duct sealing

Can’t Anyone Get Things Right?

Posted on April 18,2015 by CarlSeville in duct

In my business of certifying buildings, most of my work involves working with architects, contractors, and trade contractors who are trying to create green buildings. Unfortunately, they frequently miss the mark in some key areas. Many of them are well intended but don’t have a broad enough view of their projects. Others only do the minimum required to meet a green building standard forced on them by someone else. And a few, thankfully, seem to get it and work hard to do the right things. This post, the first in a series about problems I run across, will focus on HVAC.

Thou Shalt Commission Thy Ducts!

Posted on April 18,2015 by ab3 in air conditioner

The typical new home gets a heating and air conditioning system that's about two times too large. I've  discussed oversized air conditioners many times before.

Tighter Houses with Less Effort

Posted on April 18,2015 by ScottG in Aeroseal

Builders who specialize in high-performance houses spend a lot of time tracking down and correcting air leaks. The process can involve a number of materials and sealants, such as special gaskets, tape, and caulk, plus a lot of time and attention to install them correctly. Researchers at the Western Cooling Efficiency Center at the University of California-Davis think they've found a way to make the process much faster and easier.

New Videos: Sealing Ducts and Installing Dense-Packed Cellulose

Posted on April 18,2015 by GBA Team in cellulose

GBA has released two new videos: one on installing dense-packed cellulose in stud cavities, and the other on sealing duct seams with mastic. Both videos were recorded in March 2013 at NESEA's Building Energy 13 conference in Boston.

Why Don’t More HVAC Contractors Own Duct Leakage Testers?

Posted on April 18,2015 by ab3 in Bailes

HVAC contractors own a lot of equipment. Of course, they have pressure gauges to test refrigerant charge in air conditioners and heat pumps, and many more pieces of technical equipment. One piece that few contractors own, however, is a duct leakage tester. With more and more state energy codes requiring duct leakage tests, doesn't it seem obvious that HVAC contractors need to be like plumbers and test their own work before passing it off?

Cool Tool for Duct Testing

Posted on April 18,2015 by CarlSeville in Duct Blaster

Some days I like my work, and some days I don’t, but I guess that’s just the way the world is. This love/hate relationship really rears its ugly head when I have to go out and do blower door and Duct Blaster testing on homes. It’s not one of my favorite things to do, but if the weather’s nice and the drive’s not to far, it can end up being a good, and reasonably profitable, day.

How to Track Down Leaks in Forced-Air Ductwork

Posted on April 18,2015 by ScottG in duct

Leaky ducts in a forced-air heating and cooling system are an all-too-common problem contributing to significant energy losses and lower indoor air quality. Mark Renfrow knows that. Duct tests at his 3,400-sq. ft. home revealed “huge leakage.” A contractor addressed the problem by applying mastic to any accessible ductwork. But the key word is “accessible.” Many parts of the system apparently are not so easy to reach.

Sealing Ducts: What’s Better, Tape or Mastic?

Posted on April 18,2015 by user-756436 in duct

Most residential duct systems have numerous leaks that waste energy and lead to room-to-room pressure imbalances. Unfortunately, though, few building inspectors outside of California bother to enforce existing code requirements that residential duct seams be sealed with mastic or high-quality duct tape.

Duct Leakage Testing

Posted on April 18,2015 by user-756436 in Duct Blaster

For years, Americans who would never put up with leaky plumbing pipes have been willing to accept leaky ducts. While water damage is hard to ignore, the damage caused by leaky ducts is more subtle. Yet leaky ducts not only waste huge amounts of energy — they can also lead to comfort complaints, moisture problems, mold, and rot.

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