Comments on: Getting Mechanical Ventilation Inside Conditioned Space https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/ Building science knowledge, HVAC design, & fun Fri, 11 May 2018 20:17:04 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Michael https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-11412 Fri, 11 May 2018 20:17:04 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-11412 I got a quote on spray
I got a quote on spray foaming my attic that was around 6k and more than half of that was removing the existing insulation. I can encapsulate my ducts with closed cell spray foam for under 2k. I have R 30- R40 in my attic. Is there a good reason to spend the extra 4k and completely seal the attic?

]]> By: Bo https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10312 Sat, 11 Feb 2017 03:51:10 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10312 Re: Duct tape comments
Re: Duct tape comments
I would like to think that anyone installing an ERV/HRV in the manner photographed knows the proper duct-sealing methods. There’s got to be another explanation (of why it appears to be duct tape). Besides, if it actually is duct tape, Allison would be too embarrassed to post the photo!

]]> By: Jim Vaughn https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10311 Fri, 10 Feb 2017 21:26:13 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10311 I’m with Alex. Who uses fiber
I’m with Alex. Who uses fiber duct tape on a mechanical system? If one is going to use tape on any part of a mechanical system, it at least needs to be UL Listed 181.

With all the thought and effort that went into installing the system, seems like someone might have thought to bring a bucket of duct mastic.

]]> By: John https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10310 Fri, 10 Feb 2017 18:25:12 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10310 In reply to Thomas Dugan.

If residential construction
If residential construction keeps installing mechanicals in attics I agree brining this attic space within the building envelope makes sense. ccSPF isn’t a requirement. It could be done with ocSPF or a combination of fluffy stuff and rigid exterior foam on top of the roof deck.

]]> By: Kris https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10309 Fri, 10 Feb 2017 18:20:28 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10309 In reply to Matthew Damon.

No. HRV/ERV’s are not
No. HRV/ERV’s are not designed to move high volumes of air and require air volumes which are basically balanced (Air In = Air Out). Also a HRV/ERV requires exhaust air from within the home in order to function as intended.

HRV exhaust air will temper incoming supply air.
ERV exhaust air will temper incoming supply air and transfer some moisture.

]]> By: Thomas Dugan https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10308 Fri, 10 Feb 2017 15:47:56 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10308 Good article. Yet another
Good article. Yet another reason to justify sealing the attic with closed cell foam under the roof decking and bringing the attic space inside the conditioned envelope.

]]> By: Matthew Damon https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10307 Fri, 10 Feb 2017 14:16:55 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10307 Can the Air Cycler be
Can the Air Cycler be combined with an HRV in a supply only installation with a FHA furnace? It seems like just opening a damper in winter would distribute freezing cold air through a home (specifically, mine!).

]]> By: Alex Bodian https://www.energyvanguard.com/blog/getting-mechanical-ventilation-inside-conditioned-space/#comment-10306 Fri, 10 Feb 2017 14:01:51 +0000 http://energyvanguard.flywheelsites.com/?blog_post=getting-mechanical-ventilation-inside-conditioned-space#comment-10306 Very nice application. And
Very nice application. And good steps to seal & separate the space. But it looks like gray [duct] tape sealing the vent pipes to the system… That will deteriorate and fall off in a couple of years. What effect will leaking humid air have on the insulation in that space?

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