NewsCommunityPaul’s call for Special OlympicsBy Alan Jacques – January 16, 2014 862 Keith Earls autobiography coming this October Print Team News: Tommy O’Donnell starts in exciting Munster team to play Cardiff Facebook Twitter Tommy O’Donnell reflects on most cherished Munster memories Listen: Josh Wycherley ‘has a big future at this club’ Linkedin Advertisement Previous articleDelamere has newsNext articlePenal laws (Editorial) Alan Jacqueshttp://www.limerickpost.ie TAGSfeaturedIreland rugbyMunster.RugbyMusic LimerickPaul O’ConnellSpecial Olympics WhatsApp RELATED ARTICLESMORE FROM AUTHOR RUGBY legend Paul O’Connell is calling on volunteers to line out with him at the Special Olympic Ireland Games which take place in the city this summer.From June 12 to 15, a total of 1,500 athletes will compete for Olympic glory when the Games return to Limerick following their Treaty city success in 2010.Sign up for the weekly Limerick Post newsletter Sign Up Ireland rugby captain Paul O’Connell, who is an ambassador for the Special Olympic Ireland Games, has issued a rallying call to sign up 3,000 volunteers in the next two month to ensure the success of the 2014 event.“Getting involved as a volunteer at the 2014 Special Olympics Ireland Games will be an unforgettable and rewarding experience. We all need to help Special Olympics Ireland reach its target of recruiting 3,000 volunteers to ensure that these Games are a huge success for all of the athletes involved. Your involvement is vital and is guaranteed to make a real difference,” he said.The Special Olympic Ireland Games promise to be Ireland’s largest and most prestigious sporting event this year. 1,500 athletes will descend on the city, accompanied by 500 coaches and official delegates as well as a contingent of over 3,000 family members.The Games will be supported by a team of 3,000 volunteers who will be recruited from Limerick and surrounding counties over the coming months. Athletes will compete in 13 sports in venues throughout Limerick. As well as being the main residential centre, the University of Limerick will host the athletics, aquatics, basketball, football, gymnastics, kayaking competitions and the non-competitive motor activities training programme.Special Olympics Ireland CEO, Matt English, said the success of the Games will be down to the support of volunteers.“To date we have already signed up a good number of volunteers. We will need the support of lots of different organisations and individuals to achieve all that we need to but I know that the people of Limerick will rise to the occasion as so many have done already,” he said.Anyone interested in volunteering for the Special Olympics or wishing to make a donation can do so by emailing [email protected] or by calling lo-call 1850 555 222. Email Squad Update: Murray, Farrell and Ahern out as Coombes returns in time for Cardiff clash Rhys Marshall confirmed as latest Munster departure
Freshman outside hitter Billy Fauntleroy sets the ball for the Trojans in the first set of a game against Cal State Northridge as the team hosted the USC Fall Tournament at the Galen Center. Photo by Kaan Demiroz | Daily TrojanThe men’s volleyball team will wrap up its preseason play at the UCLA Fall Tournament this weekend. The Trojans will face off against three teams, including the Bruins, in the tournament at the Wooden Center.The weekend will start with a match against UC Santa Barbara on Friday. The Gauchos went 10-16 last season, struggling against top-tier competition and dropping their final five games of the season. The teams faced each other twice last season. In the first meeting, the Gauchos surprised the Trojans in a hard-fought 3-2 match. USC bounced back in the second meeting, claiming a 3-0 victory.On Saturday, the Trojans will face off against Cal State Northridge. The Matadors went 12-15 last season, playing the Trojans twice. Similarly to UC Santa Barbara, Cal State Northridge came out strong and swept USC in a 3-0 victory in the teams’ first meeting. The Trojans returned a month later and battled for a 3-2 win, leaving the teams level at 1-1 on the season.Following the game against Cal State Northridge, the team will face UCLA for a preseason rivalry match. The Bruins were 17-10 last season, and finished ranked No. 6 in the AVCA Division Coaches’ rankings. The rivals met twice last season, and the Bruins came away victorious both times. In the first meeting, UCLA won 3-1. The second came late in the season, with UCLA sweeping USC 3-0.Previously, the Trojans went 1-5 in the USC Fall Tourney, a tournament the team hosts at the Galen Center each year. USC split teams for the tournament, notching a solo victory over Concordia in a 3-0 sweep. However, the Trojans fell to Cal State Northridge, Grand Canyon, Stanford, UC San Diego and UC Santa Barbara in three sets. The tournament allowed for third sets to be optional, but the Trojans took the extra set each time for experience.After the UCLA Fall Tournament, the regular season will officially begin for the Trojans with a non-conference home matchup with Princeton at the Galen Center. The team will then travel to Hawaii for the Texaco Rainbow Warrior Classic, facing off against Juniata, Stevens Institute and Hawaii.
Women’s World Cup 2019: 13 crazy stats from the U.S. rout of Thailand Forward Alex Morgan finished with five goals for the United States as it netted four times in a six-minute period, before adding six goals in the final 20 minutes.The scoreline could have been even greater if Jill Ellis’ side had not been so wasteful in the opening period — although it was still a record margin of victory at a World Cup finals — and the Thailand coach said her players were extremely disappointed in the aftermath. Related News Women’s World Cup 2019: Updated group stage results and standings Thailand coach Nuengrutai Srathongvian had no complaints with being on the receiving end of a record-breaking 13-0 scoreline against the United States at the Women’s World Cup on Tuesday.The world champions dominated the first half and led 3-0 at halftime but flexed their muscles after the break as a hapless Thailand side collapsed. A good night for the @USWNT…#USATHA | #FIFAWWC pic.twitter.com/VqQOV8o7gM— FIFA Women’s World Cup (@FIFAWWC) June 11, 2019″We accept the score today. We haven’t done enough,” Srathongvian said.”We accept that they are very strong and they were excellent all round. We accept our mistakes and we’re going to improve.”As for the emotions of my players, they were waiting for this moment. They were really disappointed because the score wasn’t what they had been expecting.”They are all athletes. They will be resilient.”Srathongvian thanked the United States players for embracing their Thai counterparts following the final whistle.”The US players after the match saw that our players were very disappointed and let down,” she added. Women’s World Cup 2019: 3 takeaways from USA’s record-setting win over Thailand “They wanted to encourage us to continue fighting. We thank them very much for that.”We have got two more games to play and we need to bounce back. We need to learn from here.”Thailand, ranked 34th in the world, take on Sweden in Nice on Sunday.
MOST READ Officer dies of cardiac arrest after fan violence in Spain Steam emission over Taal’s main crater ‘steady’ for past 24 hours “That’s what he does, man,” Walker said. “That’s what he does. He gets every rebound, he dominates the paint. It showed in his numbers. Twenty-four? That’s unbelievable, man. We’re going to need that from him every night if we want to make a push. We’re going to need that Dwight Howard to be there every night for us.”Even with Howard’s early dominance, both teams were playing their first game since the All-Star break and had to shake off the accompanying rust that resulted in roller-coaster play. The Hornets held a 55-53 halftime lead after hitting 46 percent behind the arc. Charlotte then had a 13-0 run to start the third quarter, sparked by seven points from Michael Kidd-Gilchrist.And the Hornets still needed Walker’s big fourth quarter, when he had 14 points on 5-for-6 shooting, to secure the victory.The Hornets outscored the Nets 31-22 in the fourth, and Howard managed to tack on just two more rebounds to his total in that final quarter.“I was tired,” Howard said with a sigh afterward. “I was tired. I should’ve got more.”TIP-INSNets: Have yet to win in February. Their last win came Jan. 31 against Philadelphia. … Russell started for the first time since Nov. 11. The guard had arthroscopic surgery to “remove loose bodies” in his knee. Russell returned to the lineup Jan. 19, but has been playing in a reserve role. … Allen Crabbe’s second 3-pointer was his 140th of the season, moving him into sole possession of seventh place in Nets’ single-season history.Hornets: Howard had his fifth game of 20 or more rebounds this season, one shy of the most by a player in Charlotte franchise history. … Charlotte has just 10 home games remaining this season. … This marked the first game the Hornets played since general manager Rich Cho was fired last week. Assistant general manager Buzz Peterson has assumed the position in an interim role.STATUS: HOPEFULAtkinson said he’s “hopeful” that both Rondae Hollis-Jefferson and Caris LeVert will be able to return to the lineup for Monday’s game against Chicago. Hollis-Jefferson has missed the last 10 games with a right groin strain, and LeVert has missed the last four games — the first for a concussion, the last three for a right knee sprain.“I know that’s not an NBA official term — hopeful — but I’m going to stay with hopeful,” Atkinson said. “They both worked out pretty hard again (Thursday) morning, but we’ll see how they look (Friday).”FINDING RHYTHMThe All-Star break has both positives and negatives, according to Clifford. GALLERY: Barangay Ginebra back as PBA Governors’ Cup kings Charlotte Hornets’ Kemba Walker (15) gets by a grimacing Brooklyn Nets’ Spencer Dinwiddie, who was caught in a screen by Hornets’ Dwight Howard (12) during the first half of an NBA basketball game in Charlotte, N.C., Thursday, Feb. 22, 2018. (AP Photo/Bob Leverone)CHARLOTTE, N.C. — Dwight Howard said he was tired. He called his legs “noodly” and “wobbly.”“My legs and mind wasn’t on the same page,” the Charlotte center explained. “Next time, I’ve got to make sure they’re on the same page so I can get more rebounds for the team and we can get a good win.”ADVERTISEMENT UK plans Brexit celebrations but warns businesses may suffer Phivolcs records 2 ‘discrete weak ash explosions’ at Taal Volcano Sea turtle trapped in net freed in Legazpi City Don’t miss out on the latest news and information. “When guys get into a rhythm of playing 3-4 times a week, even though they’re fatigued, they’re in a rhythm,” Clifford said. “The break is great for everybody, it’s a reset. You get refreshed. And then the first game or two, it’s a little bit more like early in the season where they’ve got to get back into rhythm, feel comfortable again.”UP NEXTNets: Host Chicago on Monday.Hornets: Visit Washington on Friday.Sports Related Videospowered by AdSparcRead Next Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew Phivolcs records 2 ‘discrete weak ash explosions’ at Taal Volcano LATEST STORIES Even with his exhaustion, Howard dominated the interior Thursday night, grabbing a season-high 24 rebounds while adding 15 points as his Hornets topped the Brooklyn Nets 111-96.Kemba Walker led Charlotte with 31 points on 12-of-22 shooting as the Hornets improved to 25-33 with their second straight win. All five Charlotte starters scored in double digits and the Hornets hit 52.4 percent from 3-point range.FEATURED STORIESSPORTSTim Cone, Ginebra set their sights on elusive All-Filipino crownSPORTSGinebra beats Meralco again to capture PBA Governors’ Cup titleSPORTSAfter winning title, time for LA Tenorio to give back to Batangas folkDante Cunningham had 22 points and 12 rebounds for the Nets, who lost their eighth straight game and fell to 19-41.D’Angelo Russell, starting for the first time since November knee surgery, scored 19 points on 7-of-16 shooting. Nueva Ecija warehouse making fake cigarettes raided, 29 Chinese workers nabbed It’s too early to present Duterte’s ‘legacy’ – Lacson View comments Carpio hits red carpet treatment for China Coast Guard PLAY LIST 02:14Carpio hits red carpet treatment for China Coast Guard02:56NCRPO pledges to donate P3.5 million to victims of Taal eruption00:56Heavy rain brings some relief in Australia02:37Calm moments allow Taal folks some respite03:23Negosyo sa Tagaytay City, bagsak sa pag-aalboroto ng Bulkang Taal01:13Christian Standhardinger wins PBA Best Player award Howard set the tone from the start, with 10 points and 11 rebounds after just 10 minutes of play in the first quarter in leading the Hornets to a 32-28 edge.“That first quarter really hurt us,” Nets coach Kenny Atkinson said. “It wasn’t going as well with Dwight Howard in there, but we all have to help him (center Jarrett Allen) and do a better job; that is a load and a half.”Hornets coach Steve Clifford, who was an assistant in Orlando when Howard began his NBA career there, said he is surprised the 32-year-old who has had both knee and back surgery still is capable of nearing his career high in rebounds (26).“You’re talking about a guy that’s had major knee surgery and major back surgery,” Clifford said. “You’d never know it.”It is what his Hornets teammates have come to expect from Howard, who recorded his 37th double-double.ADVERTISEMENT
Prison break…$18M approved for emergency shelters’ constructionBy Lakhram BhagiratPresident David Granger, in a three-minute pre-recorded statement early Monday night, said that following the second meeting of the National Security Committee (NSC) on Monday, approval was given for a four-part emergency plan to bePresident David Granger, along with Ministers Joseph Harmon, David Patterson and Basil Williams following the National Security Committee meetingimplemented in light of the fire that destroyed the Georgetown Prison. Up to press time, four armed and dangerous prisoners remained on the run.“The NSC has approved the immediate implementation of a four-part emergency plan, which includes the construction of temporary structures to safely and securely house prisoners in the short term and protect the population; the completion of recovery operation to account for and accommodate every single prisoner; the implementation of legal measures to immediately reduce prison population and importantly, the immediate recapture of those inmates who escaped custody,” the President told the nation.He informed that the NSC received up-to-date reports on the death, destruction and displacement caused by the fire set by rioting prisoners. He added that the Guyana Defence Force, Guyana Police Force, Guyana Prison Service, and Guyana Fire Service were working together to ensure public safety and that a manhunt was being executed to recapture the escapees.The President informed that air and ground patrols were being conducted, whileMembers of the National Security Committee meeting on Mondayvigilance has been heightened on roadways and key points to ensure maximum safety of citizens. He stated that the NSC would be convening another meeting shortly and assured that all measures were being implemented to ensure the situation returned to normalcy.“I mourn the loss of prison warden Odinga Wickham, who was murdered in the execution of his duties and I extend condolences to his family. We will ensure that the best medical attention will be given to everyone else, who received injuries in the riot,” he said.“The Government is continuing to implement measures, particularly the major recommendations which were made by the Commission of Inquiry in the March 2016 prison riot. These include the expansion of the infrastructure of the Mazaruni prison. The Government is committed to public safety and for the reform of the Guyana Prison Service,” President Granger added.By the end of Monday, close to 300 inmates are expected to be safely relocated to various detention facilities across the country, including at Mazaruni, New Amsterdam and Timehri. The remainder will be housed at Lusignan, where temporary facilities are currently being installed by engineers from the Public Infrastructure Ministry. Tents, in addition to portable toilets, are being set up to protect inmates from the elements, while construction begins on three holding shelters, washrooms and reinforced gates. A budget of $18 million has been approved to execute these works.Public Security Minister Khemraj Ramjattan is appealing to citizens who might have information on the inmates that are on the run to come forward and cooperate with law enforcement officers. The next 72 hours, he said, will be critical in terms of implementing the four-point plan.“We should reduce the number at Lusignan from 1000 to about 450 by virtue of what we are doing administratively and also by the process of transfers…So, it is a very complex set of arrangements that we are putting in place to ensure the safety of all as well as the recapture of those who have escaped,” he said.Thus far, the Guyana Police Force has issued wanted bulletins for Stafrei Hopkinson Alexander; Uree Varswyk aka “Malcolm Gordon” and Mark Royden Durant aka Royden Williams and “Smallie”.Calm and unitySocial Cohesion Minister, Dr George Norton, in a statement, called for calm and unity to prevail during the trying times.“We condemn all efforts to use this opportunity to polarise and fracture us as a nation. This is not a time for division in our society as every Guyanese must be each other’s keeper given the current circumstances,” the Minister said.The Ministry is appealing to citizens across the length and breadth of our country to desist from engaging in hate speech, particularly in the areas of politics, race, ethnicity and religion via social media and in their respective communities. Additionally, persons are being urged to desist from spreading rumours and unconfirmed reports, which may incite negative actions and animosity, the statement added.The Minister is also encouraging citizens to follow important safety precautions communicated by the Public Security Ministry. He also commended the Joint Services for the work, which has been done so far and expressed confidence that ongoing efforts to recapture the prison escapees and all other approaches to restore normalcy would be successful. “We take this opportunity to offer sincere condolences to the loved ones of prison warden Odinga Wickham, who lost his life in the line of duty. In addition, the Ministry wishes to convey regrets on those injured and otherwise affected by the incident,” the statement concluded.Around 16:45h on Sunday, the Georgetown Prison went up in flames.
CLICK HERE if you are having a problem viewing the photos on a mobile deviceSANTA CLARA – Here is how the 49ers (1-6) graded in their 39-10 home loss Sunday to the Los Angeles Rams (7-0):PASS OFFENSE: FC.J. Beathard again proved too slow on the trigger, leading to two interceptions and a career-high seven sacks, the first of which resulted in a lost fumble. He has yet to have a turnover-free start, and at 1-8 as a starter, his leash is shortening to where he may at most have three losses …
As we did when we successfully hosted the 2010 Fifa World Cup, the people of South Africa must work together, saving electricity and planning for load shedding, to help us through the current power crisis, writes Minister of Public Enterprises Lynne Brown. Over the past 20 years, electricity has been provided to more than 5.8-million South African households, reducing the percentage of households without electricity from about 50% in 1994 to the current 14%. (Image: Media Club South Africa) Minister of Public Enterprises Lynne BrownWhen South Africans stand together, we are able overcome the odds. It is a characteristic that has long defined us as a nation. We demonstrated this tenacity when we successfully hosted the 2010 Fifa World Cup.That success demonstrated our capabilities to the world and earned us the reputation of a country that can deliver.Our national power supply remains under pressure as Eskom is at times unable to produce the full electricity required due to maintenance and unexpected breakdowns at power stations.In this instance it becomes necessary to interrupt supply to certain areas through load shedding.Our demand for electricity has reached the point where at least level one load shedding, a point which requires that 1 000 MW be removed from the grid, and sometimes level two, which requires the removal of2 000 MW.The government apologises for the inconvenience caused as a result of the unplanned electricity disruptions and remain deeply concerned over the effect it has had on the lives of South Africans. Its impact on business is equally troubling as our economy is dependent on electricity for economic growth.Click image for a larger view:The government is working to secure South Africa’s future energy supply through an energy mix made up of coal, solar, wind, hydro, gas and nuclear energy.In the meantime, let us help the country by trying to work around load shedding. We should take time to familiarise ourselves with the schedule in our areas.This way we will be able to plan ahead so that the power disruptions have less of an impact on our family life and businesses. Households and businesses are encouraged to prepare for at least two-hour power outages between 7am and 10pm daily.Be aware of the national energy alerts on radio and television, and immediately respond to them by switching off high-energy appliances such as geysers, pool pumps, ovens and air conditioners so that we pass the critical period with limited disruptions.The energy situation going forward remains extremely tight. But let’s bear in mind that we are all in this situation together and need to do everything possible to get through this short-term strain.The government is confident that its analysis of the situation and the measures it is introducing will bring relief in the foreseeable future.We are supporting the national grid through the more frequent use of diesel powered open-cycle gas turbines to help bridge the immediate gap between supply and demand.Work is under way to reduce maintenance backlogs and improve the performance of power plants to reduce unplanned outages. These are a major concern.There are also plans in place to restore 960 MW of generation capacity at Majuba Power Station by the end of the year, after one of its storage silos collapsed last year.These immediate interventions are receiving our highest priority through the Interministerial War Room established by Cabinet to fast-track the implementation of a five-point plan to turn the current situation around.The War Room is led by Deputy President Cyril Ramaphosa, supported by relevant ministers and a Technical War Room of directors-general.Our energy crunch is a result of a number of complex factors. It includes the legacy of apartheid, where millions of marginalised black South Africans were deliberately excluded from the national grid.Over the past 20 years, electricity has been provided to more than 5.8-million households, reducing the percentage of households without electricity from about 50% in 1994 to the current 14%.Over the medium term, the government is working to secure the national grid by buying an additional 1000 MW from private power producers, which will come on stream within 18 months.The launch of an independent power producer programme that harnesses waste energy from the sugar, paper, and pulp industries to produce about 800 MW is part of the department’s plans.A number of potential gas-to-power projects have also been identified. These include both new gas-fired power stations and conversion of diesel-fired power stations to gas.Our energy situation affects all of us. In the interest of the nation, we need to work together to solve our collective problem in the spirit and manner in which we rose to the challenge of 2010.Like in our preparation for the 2010 Fifa World Cup, failure is simply not an option. We can and will overcome this tight energy situation when we stand together.
Over the past few months, I’ve taken a look at some critical issues for indoor air quality. Starting with the issue of how much time we spend indoors, I then wrote about kitchen ventilation, the panoply of indoor air pollutants, problems with filters in general and with high-MERV filters. Now let’s take the next step: a look at what research has been done on high-MERV filters and what can be done to overcome those unintended consequences I wrote about. Study #1 Article: Residential AC Filters by John Proctor, ASHRAE Journal, October 2012. In this article, John Proctor summarized some of the results he and his colleagues have found from studying California homes. One of the concerns in their research for the California Energy Commission was homeowners changing out 1-inch-thick standard fiberglass filters with 1-inch-thick pleated filters.RELATED ARTICLESSeven Reasons Your Filter Isn’t Cleaning the AirAll About Indoor Air QualityAll About Air Purifiers The Air Conditioning Contractors of America (ACCA) protocols for HVAC design assume a pressure drop of 0.10 inches of water column (i.w.c.) across the filter. (Keep that number, 0.1 i.w.c., in mind as a reference point. I’ll be coming back to it.) If a system is designed with a standard filter for that pressure drop, the pressure drop with a pleated filter of the same size will most likely be higher. In addition, poorly designed and installed duct systems already have external static pressures that are too high. The typical furnace or air handler is rated for 0.5 i.w.c. but many run much higher pressure. David Richardson of the National Comfort Institute says that in the testing they’ve done, the average system is running at about 0.82 i.w.c. Result: In the California study, Proctor et al. found that the pressure drop across the filter in 34 HVAC systems was 0.28 i.w.c. That’s nearly three times what ACCA protocols assume. It’s also more than half of the rated external static pressure for the whole system. Study #2 Article: Is There a Downside to High-MERV Filters? by David Springer, Home Energy Magazine, 2 November 2009. David Springer of the Davis Energy Group published this great article with a lot of detail about what they did and what they found, including blower energy use, compressor energy use, and the specific filters they tested. I’ll let you go there for the details because here I’m mainly going to focus on the issue of pressure drop across the filter and the resulting effect on air flow. And speaking of filter pressure drop, here’s their chart for filters with MERV ratings from 2 to 13. Chart of filter pressure drop for filters with MERV ratings from 2 to 13. [Image Credit: David Springer, Home Energy Magazine article, Nov. 2009]They tested all the filters at the same width and height (16″ x 25″) but the depth varied from 1″ to 4″. They used 492 feet per minute (fpm) as the face velocity because that’s what the ASHRAE filter standard (52.2) calls for. With that face velocity and those dimensions, the air flow rate is 1,367 cubic feet per minute (cfm). (Flow rate equals area times velocity; see my article on the continuity equation for more on this.) Results: As you can see, there’s not a steady increase in pressure drop as the MERV rating increases. What does happen, though, is that the pressure drop jumps up significantly as soon as you change from the standard 1″ fiberglass filter (MERV-2) to the next level at MERV-6. They also found “a definite trend toward lower air flow with higher-MERV filters for systems using PSC motors.” (PSC stands for “permanent split capacitor.” A PSC motor is the one powering most HVAC blowers. Variable speed blowers have electronically commutated motors, ECMs.) The final result I’ll mention here is that they didn’t see as much difference as they expected for filters of different depths. For example, “the 4-inch Filtrete 1550 (MERV 12) was only marginally better than the 1-inch Filtrete 1700 (also MERV 12) and the two other [1-inch] MERV 11 filters of the same brand (1000 and 1085).” Study #3 Article: The Effects of Filtration on Pressure Drop and Energy Consumption in Residential HVAC Systems by Brent Stephens, Atila Novoselac, PhD, and Jeffrey A. Siegel, PhD, HVAC&R Research, Vol. 16, #3, May 2010. This one is an academic paper so if you want all the details, equations, and references to other works, click the link above and download the paper. (Brent was a student at the time he wrote this paper and has a page on his filter research on his website at the Illinois Institute of Technology, if you want to dive even deeper.) They looked at filter pressure drop and energy consumption, both theoretically and using four months of data from two air conditioning systems in a test house in Austin, Texas. Results: What they found is what you would expect, and in their limited range of MERV ratings tested, they did see an increase with each step up the MERV scale. Here are their results for filter pressure drop: Low-MERV (<4) 0.10 i.w.c. Mid-MERV (8) 0.19 i.w.c. High-MERV (11) 0.32 i.w.c. So the low-MERV filter is hitting the ACCA design pressure drop. The mid-MERV is twice as much and the high-MERV is three times as much. They also found that air flow in the high-MERV filters dropped by 7% and 11% in the two HVAC systems compared to the low-MERV filters. Likewise, the mid-MERV filters also showed decreased air flow relative to the low-MERV filters, this time 3% and 8% lower in the two systems. Summarizing the results As you can see above, the research shows that in general, HVAC systems with high-MERV filters have a higher pressure drop across the filter. This part is common to all three studies above. What happens with the air flow depends on what kind of blower the HVAC system uses. In a system with a PSC blower, the air flow drops and energy use doesn’t change much. The Stephens paper cites a 2002 study showing that 90% of all residential HVAC systems had PSC blowers. Certainly that number has fallen in the past 16 years, as high-performance homes and high-performance HVAC systems have become more popular. But I’m sure the vast majority of homes still have PSC motors running the blower. For those with the other type, the electronically commutated motor (ECM), the controls on those motors typically ramp up the motor speed as the pressure increases so relatively constant air flow is maintained. But there’s a penalty. Blowers with ECMs can be more efficient than those with PSC motors when they’re operating against the pressure they’re designed for. But when the pressure is higher, they can end up using more energy than the PSC blower. How to get good air flow AND good filtration So what can you do to be able to use a high-MERV filter and not suffer a high pressure drop across the filter and the resulting loss of air flow (PSC blower) or increased energy use (ECM blower)? It’s actually pretty simple. You just have to make the filter large enough to have a low face velocity. Remember my article on the continuity equation? As a duct gets larger in cross-sectional area, the velocity goes down. A lot of filters have a table printed on the side showing the pressure drop at a given air flow, and that’s something that you have to learn to use. John Semmelhack, owner of the building science consulting firm Think Little in Charlottesville, Virginia, does this regularly because he has to. He designs and commissions a lot of ducted minisplit heat pumps that have very low external static pressure ratings. With a system rated for air flow at 0.20 i.w.c, you don’t want to give up even the ACCA recommended 0.10 i.w.c. So he goes for — and gets — 0.03 i.w.c. Yeah! Really! We’re in the process of having a Mitsubishi ducted minisplit installed in our office and that’s what we’re going for, too. So, yes, most systems with high-MERV filters do have problems with excessive pressure drop across the filter and reduced air flow (or increased energy use). But that’s just because of lack of awareness of — or lack of interest in — how to do it properly. Allison Bailes of Decatur, Georgia, is a speaker, writer, building science consultant, and the author of the Energy Vanguard Blog. You can follow him on Twitter at @EnergyVanguard.
Former Boston Celtics player Nate Driggers, (9) right, seen here in a scrimmage in 1996, was found guilty on April 20, 2017, of receiving guns that were stolen off a freight train in Chicago. (Joseph Rodriguez / Greensboro News & Record via AP)CHICAGO — An eight-year prison sentence has been handed to a former Boston Celtics player found guilty of receiving guns stolen off a freight train in Chicago.Nate Driggers was found guilty in April of being a convicted felon in possession of stolen guns.ADVERTISEMENT E.T. returns to earth, reunites with grown-up Elliott in new ad Frontrow holds fun run to raise funds for young cancer patients Trending Articles PLAY LIST 00:50Trending Articles01:48NBA: Kawhi, George seek more for Clippers than beating Lakers00:50Trending Articles01:37Protesters burn down Iran consulate in Najaf01:47Panelo casts doubts on Robredo’s drug war ‘discoveries’01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:49Robredo: True leaders perform well despite having ‘uninspiring’ boss02:42PH underwater hockey team aims to make waves in SEA Games Read Next LOOK: Loisa Andalio, Ronnie Alonte unwind in Amanpulo for 3rd anniversary Nonong Araneta re-elected as PFF president 22 and through: Indians’ AL record win streak stopped at 22 MOST READ Evidence presented at trial showed the 44-year-old Driggers bought 30 of 111 Rugers stolen by gang members in 2015 from a rail car parked in a rail yard and quickly resold 29 of them. Only 19 guns have been recovered.In asking for the maximum sentence of 10 years, prosecutors said Driggers’ actions have contributed to the “very dark place” Chicago finds itself in when it comes to gun violence.FEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSSEA Games: Philippines picks up 1st win in men’s water poloSPORTSMalditas save PH from shutoutDriggers on Thursday again denied ever selling guns.Drafted by Celtics in 1996, Driggers appeared in 15 games that season. WATCH: Streetboys show off slick dance moves in Vhong Navarro’s wedding Fire hits houses in Mandaluyong City BSP sees higher prices in November, but expects stronger peso, low rice costs to put up fight View comments Brace for potentially devastating typhoon approaching PH – NDRRMC Don’t miss out on the latest news and information. LATEST STORIES