0 Helpful?

Whole-house fan in cathedral ceiling design

I'm building in climate zone 6B and I'm trying really hard not to put in AC. Our house is at 7000ft but we still get a few weeks of hot temperatures that are bearable during the day but are too hot for us to sleep at night. My thought was to do an air flush in the evening using a whole house fan.

We are doing cathedral ceilings and all the whole house fans I've seen have been installed into an attic space which we obviously don't have. Is there another option for us? Maybe a ducted whole house fan that can be ducted up through a chase and vent directly outside. I imagine a motorized baffle on the exterior side to provide sealing during the winter months and when we are not using it.

BTW we are planning radiant floor heating so we don't have forced air duct work except for our smaller HRV ducting.

Any suggestions on how to get a whole house air change at night with cathedral ceilings while maintaining my air barrier and thermal integrity in winter?


Asked by Steve Mackay
Posted Feb 13, 2018 7:09 PM ET
Edited Feb 14, 2018 7:05 AM ET


1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Several manufacturers produce whole-house fans for sloping insulated roofs. The fans are exposed to the weather.

Click here to see a website with many inexpensive models of whole-house exhaust fans for homes without attics.

A better option would be the TC1000-H fan from Tamarack -- a model with an automatic insulated damper that prevents heat flow and air flow when the unit is not in use.

Answered by Martin Holladay
Posted Feb 14, 2018 5:38 AM ET

Other Questions in Mechanicals

Slab on Grade in Climate Zone 6

In Energy efficiency and durability | Asked by Jamie B | Feb 17, 18

Innie/outie window operation

In Plans Review | Asked by Ethan T | Feb 20, 18

Lessons learned from exterior basement insulation retrofit

In Green building techniques | Asked by Mike McLaine | Feb 3, 18

what radon mitigation system do I need

In General questions | Asked by jimmie-lou | Feb 21, 18
Register for a free account and join the conversation

Get a free account and join the conversation!
Become a GBA PRO!