Comments on: 4 Types of R-Value https://www.energyvanguard.com/blog/4-types-of-r-value/ Building science knowledge, HVAC design, & fun Sun, 06 Jun 2021 16:46:58 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Tyler https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-10250 Thu, 19 Jan 2017 16:17:31 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-10250 So here’s a tricky one. How
So here’s a tricky one. How would all these calculations pertain to a house made of steel shipping containers? Normal interior wood framing and insulation.

]]> By: Tapani Talo https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9272 Thu, 26 May 2016 05:54:07 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9272 In reply to Allison Bailes.

This 2016…R-4 went out the
This 2016…R-4 went out the window before oil embargo 1973. I swear that we are heading to intellectual ice age. MIT developed South Wall glass that delivers R-12 to R-14 is something that you have to experience to understand what a great fenestration does to you. I had it for 20 years before moving to current location. I feel like I have gone to camping in the 60’s or earlier. Summer’s sun and winter cold – bot unbearable with regular double glazing. So planning a new home …and back to comfort

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9294 Wed, 25 May 2016 17:50:30 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9294 In reply to Bill Nickerson.

Great question, Bill. The
Great question, Bill. The total U-value of a window is calculated by averaging the U-value for three areas: center of glass, edge of glass, and frame. They can give the glass assembly a better U-value with coatings. They can give the frame a better U-value with insulation. You can also get a better U-value with more frame and less glass.

Sometimes 1 + 1 = 2. Sometimes 1 + 1 can equal 3 or even 4.

]]> By: Bill Nickerson https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9293 Wed, 25 May 2016 05:01:52 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9293 Allison I struggle with this.
Allison I struggle with this. If a pane of glass is R-1 how do we get to R-4 with one more and an air gap?

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9292 Tue, 24 May 2016 18:00:47 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9292 In reply to Stephen Christensen.

You’re right, Stephen. Foil
You’re right, Stephen. Foil-faced bubble wrap, insulating paint, and similar products do play a little fast and loose with the definitions. They’re giving credit to a product for the R-value of an assembly.

But R-value actually does include all three forms of heat transfer: conduction, convection, and radiation.

]]> By: Stephen Christensen https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9291 Tue, 24 May 2016 17:56:38 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9291 Any thoughts on products that
Any thoughts on products that assign “R value” to building materials with low emmissivity? I think this is a fast and loose application of the term “r value” since my understanding if R is resistance to conductive heat transfer, not radiant heat transfer.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9279 Wed, 04 May 2016 06:56:04 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9279 In reply to David Butler.

Well, David, I’ll just have
Well, David, I’ll just have to cover that in another article. I try to keep my articles from getting too long, and I like to have them lead into followup pieces.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9289 Wed, 04 May 2016 06:52:53 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9289 In reply to TAPANI TALO.

Comfort begins with a great
Comfort begins with a great building enclosure.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9287 Wed, 04 May 2016 06:51:01 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9287 In reply to John Hatfield.

Thanks, John. It’s an
Thanks, John. It’s an important topic that, as you say, isn’t well understood.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/4-types-of-r-value/#comment-9285 Wed, 04 May 2016 06:16:42 +0000 http://energyvanguard.flywheelsites.com/?blog_post=4-types-of-r-value#comment-9285 In reply to Debbie Coleman.

You’re welcome, Debbie. I’ve
You’re welcome, Debbie. I’ve been meaning to use that photo for several years now and this was a great article for it.

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