The statement that the vast majority of new U.S. homes are not tested with a blower door is not an argument; it is a fact. When houses get as tight as a plastic bag over the head, some mechanical ventilation is important. Bring the standard into the 21st century and in line with the energy efficiency standards for the building envelop. This new standard requires a ventilation rate of 72 cfm for my condo or approximately one air change every 3 hours. Instead of trying to steer homeowners toward methods to eliminate the negative effects of "infiltration" in a negative pressure living space it simply tells them to increase the flow rate of poor quailty "infiltration air". I have been doing this for about 15 years and I have tested a little more than 5000 houses in that time. In most cases I think we know way too little. Since the DER the Easily move forward or backward to get to the perfect spot.
Find the exact moment in a TV show, movie, or music video you want to share. Grantees can voluntarily elect to adopt the most recent version of ASHRAE 62.2 as soon as they are prepared to implement the Standard."

Steve Byers, myself, and several others actively lobbied for this. You can't take advantage of solar hot air channels without additional hardware; in most cases, you'll need ducts, blowers, and electronic controls. 136 and incorporated into 62.2. With this system we install radiant barrier OSB reflective side up on a new or existing home we then apply 2x4s on edge every 8 inches running the length of the roof and to those we cap with a reflective metal cap and then we apply a standard metal roof or you could sheet again with OSB and shingle. Inhaling fresh air helps clear your lungs and enables you to take deeper, longer breaths of air -- which increases the amount of oxygen that’s transported to your body’s cells.

You could just insert a video screen in the fireplace opening and dial in a continuous running loop of a wood burning fire to display. How many houses have exactly the right flue design to exhaust combustion contaminants without any waste? To fix 62.2 requires the following: 1.

Response to Dan Kolbert

(3) Does it make sense to make your thermal envelope deliberately leaky? The only approximation to the slog of equations in 62.2 is that this equation uses stories in 1/2 story increments rather than using a precise height. That was once true, but the default option was removed (for envelope & duct leakage) earlier this year as a result of public comments to RESNET Standard 301-201x.

I used to live in Atlanta too, working for Georgia Tech but now I live up near DC. (Please correct me if that is wrong, Martin.) The left side contains a waste air to water exchanger, a waste grey water to water exchanger and a fresh air to grey water exchanger. That is, no blower door test. How Try talking them into spending $1800-2000 for an HRV to be retro-fitted in an old house. different any way you tackle it. However the sensing devices for homes have been harder and harder to find.. fewer manufacturers offering them.
Here's my take on the ventilation debate (The reasoning behind this is that draft will make you feel colder - remember the ceiling fans? It's always better to eliminate those complications and problems by using an ERV'HRV before they occur in my opinion. You don't know the pressures across those holes. The simple equation for calculating the infiltration credit is not actually in the standard. You must be a magazine subscriber to access this feature. Just because some people want to discuss the appropriate minimum ventilation levels for homes does not mean that anyone is questioning the need for a mechanical ventilation system. Soaking in daylight for at least 15 minutes at the same time every day, particularly in the morning hours, helps your body shut off a snooze-inducing chemical called melatonin, according to an article in "Health" by the U.S. News & World Report 6. Do you? Home owners do care about both IAQ and energy

If a blower door test is done with a CFM50 of 1000, the required ventilation using the 2010 standard would drop to 29 cfm and with the 2013 version would drop to 30 cfm. It would depend on the climate. This is the nature of a prescriptive requirement.

I'm afraid as the entire 'energy related' industry moves forward, we'll all get beat up.

I'm old enough to remember those cans but young enough that I wasn't drinking alcoholic beverages from them.

I have corrected the article to reflect the information your provided. Yes, there are requirements for exhaust for local source control in kitchens and bathrooms. (For more information on providing fresh air for homes, ... and we need some common-sense (and flexible) guidelines for builders on how these systems should be installed. (4) Does it make sense to try to fool the Blower Door Police? Having your cake, and eating it. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. Using an average HRV, the cost to run the HRV continuously with perhaps intermittent circulation of the existing furnace fan -- can easily consume 200W. Under the new formula, high-performance homes will need to be ventilated at a higher rate, namely 7.5 cfm per person plus 3 cfm per 100 square feet. Sunlight is also thought to help ward off depression and stress because the “happy” chemical serotonin is higher in the brain during the time of year when days are longer. What we are now getting are excessive negative pressures and part-load humidity problems in new houses. I do not.

This may be a sensitive subject in these parts but I think this article and its recommendations are quite outdated.

3. - We're outside. (It doesn't take rocket-science or hard math to figure that out either.). I, by comparison, work predominantly with existing homes--and mostly outside of low income programs. And then you still have the part-load humidity problem. How to do this? You cannot build a tight house and suck on it with an exhaust fan and not get into trouble. And by the way, because of heat, humidity, blood sucking mosquitoes, and pollution, no one here opens their windows. So today's bathrooms can handle moisture and this buys us time to ventilate at a slower speed where the temperature won't plummet and there is no noise in the room and the best part is its automatic and the occupants don't even have to concern themselves about it. Copy URL . About as logical as giving credit for "operable windows.". Wow Here in Santa Fe, with a city code requirement of HERS 70 or better in place since 2009, we added a 62.2 code requirement in 2012 because market forces were pushing builders to ever-tighter construction - low ACH50 numbers are bragging rights at our builder lunches.

The only draft is now where the heater is where no-one sits, lies or spends their time, extracting air does not create a draft.). That's about all the At this point, I will be very reluctant to recommend the 2013 standards to my clients until such time as I can see how it works on the ground. - Aw, where you going, sweetie? How many houses have exactly the right amount of attic or crawl space ventilation without any waste? Thanks for the report, Martin. The situation may distress you -- it certainly distresses me -- but calling it an "argument" is a red herring. According to a group of studies published in a 2010 issue of the "Journal of Environmental Psychology," research participants reported feeling happier, healthier and more alive when they spent time in nature. It has a lot of parts, and they all need to work together. So, without a compelling argument that most homes are better off one way or another there was not a sufficiently strong majority to go one way or the other. As for the issue of exhaust-only or supply-only or HRV/ERV ventilation, that’s a discussion that can go on forever.

At this rate, the relative humidity in my condo is essentially the same as outside: under 25% in the winter (I live in Canada) and well over 70% during heat waves and rainy weather in the summer.

In the U.S. today, it's safe to say that almost all builders who use blower doors are building tight homes. I am planing to build a new home here in the near future and showcasing most of our 24 inventions. When I designed Rhea I took into account how people live in their homes and adjusted Rhea to compensate for peoples behaviour. © 2020 The Taunton Press, Inc. All rights reserved.

What I have found in my energy modeling is that the heat loss through ventilation is consistently one of the top components responsible for heat loss, even with an ERV or HRV, and close to the top when you add separate bath and kitchen fans.

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