Beloved by builders, scorned by building scientists, and largely ignored by homeowners, recirculating hoods have a mixed reception. They do not require a wall penetration. They will not cause house depressurization. Some of the scientific testing shows them to be near useless in their current format but they could be a reasonable alternative to vented hoods if designed properly and maintained diligently. Is that asking too much?

Is there anyone out there with positive experiences with recirculation hoods (especially if it is supported by data)? Has anyone seen a recirculation hood design that is intrinsically superior? Or should we just continue the current advice to avoid these devices in favor of vented range hoods?

Views: 64

Discussion Forum

Depressurization/make-up air issues

Started by Don Fugler. Last reply by David Butler 2 hours ago. 22 Replies

Difficult retrofits

Started by Don Fugler. Last reply by Don Fugler Mar 18. 3 Replies

Kitchen Ventilation Resources

Started by Tom Phillips. Last reply by Don Fugler Dec 28, 2018. 2 Replies

Good Eating with Reduced Cooking Emissions

Started by Linda Wigington. Last reply by Tom Phillips Dec 27, 2018. 7 Replies

Choosing a range hood

Started by Don Fugler. Last reply by Tom Phillips Sep 25, 2018. 7 Replies

Recirculating hoods

Started by Don Fugler Aug 26, 2018. 0 Replies

Low velocity consequences

Started by Robert Bean. Last reply by Robert Bean Jun 14, 2018. 7 Replies

Latest Activity

David Butler replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"Thanks for your thoughtful reply, Brennan. My point about the load impact on tight homes with…"
2 hours ago
Brennan Less replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"David, I know the pressure reaches static levels quickly. I meant, how quickly then does radon…"
6 hours ago
David Butler replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"@Brennan, there's virtually no lag. When an exhaust fan comes on, the pressure differential…"
7 hours ago
David Butler joined Don Fugler's group
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Kitchen Ventilation

In many homes, cooking is the largest indoor source of air pollutants. Exposures can be higher in…See More
8 hours ago
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"Hi Don:  good questions, as usual. Would be great to routinely get depressurization data…"
11 hours ago
Glen Gallo replied to Rob Madden's discussion Determining Duct Leakage based solely on blower door and pressure pan testing
"delta q works cool graph does return a supply leakage sometimes it has a hard time reaching smooth…"
11 hours ago
Tom Phillips liked Don Fugler's discussion Depressurization/make-up air issues
12 hours ago
Brennan Less replied to Don Fugler's discussion Depressurization/make-up air issues in the group Kitchen Ventilation
"Hi Don, great sequence of questions, and a couple of thoughts. Overall, I just don't see…"
12 hours ago

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