Comments on: Beautiful Duct System in a Beautiful Crawl Space! Was I Dreaming?

By: Jeremy Jeffers

Jeremy Jeffers — Wed, 23 Jul 2014 22:05:59 +0000

Currently in process of
Currently in process of building our house, I’ve googled and read various “how to” info on "conditioned", "closed", and "encapsulated" crawl spaces. I’ve read supply air of 1 cfm per 30 to 50 sq. ft. of crawl space. I would like to know how the cfm was calculated on this project and the square footage of crawl space. How was the duct opening size determined? Was the cfm requirement for space entered into the design of HVAC system? What determined location of the supply duct, just close to center of space? We have 2380 sq. ft. of crawl space and my thinking is that we need more than one supply opening to distribute air more efficiently but more importantly is determining duct opening size or sizes.

By: Roland

Roland — Sun, 30 Jun 2013 22:13:08 +0000

G. Ameno

G. Ameno
You can still seal your crawl space but you will need to have a combustion fan installed for the gas appliances. They are commonly called fan in a can and provides make up air for gas appliances installed in sealed spaces for combustion safety! Roland

By: g ameno

g ameno — Sun, 30 Jun 2013 21:40:53 +0000
My crawl space abuts a
My crawl space abuts a partial cellar and gas fired hot air furnace and water heater. Would sealing off the out side affect the air supply to this equipment?

By: Roland

Roland — Sat, 29 Jun 2013 15:32:18 +0000
Allison, great article! We
Allison, great article! We sealed over 1800 crawl spaces in North Carolina last year and it never ceases to amaze me the difference that it can make! Keep up the good work!

By: Dick Peters, P.E./CM - The HVAC Whisperer

Dick Peters, P.E./CM - The HVAC Whisperer — Sat, 29 Jun 2013 09:30:24 +0000

Great post. I sealed my
Great post. I sealed my crawlspace years ago. Not as nice as this one! Don’t have an inch of flex!

Now, fish the project and solve the ridiculous and soon to be non code everywhere(already in CA)bypass ducts and dump zones in zoned systems. (VIDEO) http://youtu.be/dpmItbbeNuI 
ENJOY!

By: W. Blake Talbott

W. Blake Talbott — Sat, 29 Jun 2013 06:05:20 +0000
Great crawl space for a party
Great crawl space for a party as long as it is for non smokers.

By: Eric Lowry

Eric Lowry — Sat, 29 Jun 2013 03:11:15 +0000
I had the opportunity to
I had the opportunity to learn from Dr. Joe yesterday and the seminar was in his home directly above the crawl space pictured. Lots of good information and seeing it put into practice is even better. I've only seen a couple of these well done crawl spaces out of the multitude that I have crawled through.

By: Bill Smith

Bill Smith — Fri, 28 Jun 2013 19:52:30 +0000
This is why I sometimes
This is why I sometimes regret not doing much new construction work:-) No one ever calls and says "Please come and let me pay you to see how well my house is built".

I'm glad to see that there may be an end to those damp nasty places so that the tyvek suit can stay in the van and I won't be pulling cobwebs out of my beard.

By: Allison Bailes

Allison Bailes — Fri, 28 Jun 2013 18:39:57 +0000
James F.:
James F.: I don't know enough about hydronics and how it's done here to say whether that kind of bypass is a problem on this side of the pond.

Dixie W.: I'm with you on that!

Keith H.: Done! I should have had them in there from the beginning, so thank you for pointing out that omission.

Melissa B.: Ah, Houston. I was born there and lived my first 10 years in that humid, muggy, moist city. That's why I can appreciate how cool and dry the summers are here in the Atlanta area.

By: Melissa Baldridge

Melissa Baldridge — Fri, 28 Jun 2013 18:10:59 +0000
Thanks for the article,
Thanks for the article, Allison. I lived in Houston for 20 years, so I get your pain. Even here in Colorado, though (read, "bug-free," mostly), crawls are a mess and almost always a big part of peoples' comfort issues. I love it when I can help a client make those better. And less creepy.