Green Homes News

Diminishing returns of added insulation

Green Homes 2 - Mon, 2023-01-16 02:45
Journal of Light Construction ( published an article a few days back that presents interesting information on the diminishing returns of adding insulation. Some of you may find it interesting.…
Categories: Green Homes

Where to Invest When Preparing Your House for Power Outages

Green Homes 2 - Mon, 2023-01-16 02:00
How best to cope with disruptions in grid-tied utility services during winter
Categories: Green Homes

Low-voltage connections to current transformer for make-up air unit

Green Homes 2 - Sun, 2023-01-15 19:17
I'll be using an Electro Industries packaged make-up system with two current transformers to energize the unit:  one on the range hood circuit and the second on the electric dryer…
Categories: Green Homes

Quad Pane Alpen Windows with Thin Glass

Green Homes 2 - Sun, 2023-01-15 16:19
In another question on the site someone asked about Alpen windows and in looking at the Alpen site they mention using thin glass instead of a suspended film for energy…
Categories: Green Homes

Total Net Free Vent Area Question

Green Homes 2 - Sun, 2023-01-15 14:40
So, i am trying to better understand this calculation as it applies to this client's house for the purposes of sizing ridge vents and soffit vents.  Its a 12/12 single…
Categories: Green Homes

Heat pump with limited home insulation — worth it?

Green Homes 2 - Sun, 2023-01-15 11:20
Hi there, We're debating some major home improvements and are trying to understand whether installing a heat pump makes sense. I'd appreciate any and all advice you can provide!Our situation- 1930s…
Categories: Green Homes

Mini to complement gas FAU

Green Homes 2 - Sun, 2023-01-15 10:54
Situation:  Climate zone 5B.  My existing 75 AFUE furnace actually keeps our 1500 sf mobile home plenty warm, albeit by burning a considerable amount of LPG, and although it's now…
Categories: Green Homes

Insulate Low Slope Metal Roof

Green Homes 2 - Sun, 2023-01-15 08:46
Good Day GBA,My sons and I built this screen porch (12ft x18) with a low pitch 1.5:12. In order to get more use out of it I'd like to install…
Categories: Green Homes

Deflection performance in floor trusses compared to other joist types

Green Homes 2 - Sat, 2023-01-14 20:18
Looking for any input on this. In planning a build, we're looking to achieve a high deflection rating, such as L/720 for super stiff floors. The preference is to go…
Categories: Green Homes

Best plane for air barrier in a double wall, and easiest way to frame said wall

Green Homes 2 - Sat, 2023-01-14 14:13
Please see the attachment. I’m working on a double wall assembly design and I’d like people’s thoughts on two issues, air sealing and framing the double wall. My experience is…
Categories: Green Homes

Need new boiler, considering mini-splits & HPWH instead

Green Homes 2 - Sat, 2023-01-14 11:57
Hello All - we have a ~1700 SF place (not counting a full unfinished basement) in NH that has an old 3 zone oil boiler which is starting to leak. …
Categories: Green Homes

Lochinvar Boiler Sizing?

Green Homes 2 - Sat, 2023-01-14 10:27
Zone 4 (York, PA) Finish carpenter currently working on updating our personal home, this is our first winter here and the gas bills are as bad as I expected.  I ran…
Categories: Green Homes

Air sealing with 1/4in open cell spray foam

Green Homes 2 - Sat, 2023-01-14 09:36
I know it's not closed cell, i know its not 2in minimum, but if i spray a mist with a wide spray nozzle and standard door and window foam to…
Categories: Green Homes

Zip R Sheathing – Climate Zone 6

Green Homes 2 - Sat, 2023-01-14 07:59
I received great feedback from my question about crawl spaces so I'm back with another question.  Building a new home in Vermont (Climate Zone 6) and learned that Vermont Efficiency…
Categories: Green Homes

ROI and comfort gain of deeper walls when using ZIP R6

Green Homes 2 - Sat, 2023-01-14 04:51
Zone 5Retrofitting a porch, 23’x15’, sloped roof, to create a four-season room. Three exterior walls, lots of glass (continuous rows of windows and patio door, with knee wall and wall…
Categories: Green Homes

Leaving 2nd floor and basement unfinished to improve house envelope

Green Homes 2 - Fri, 2023-01-13 22:41
Due to budget limitations, I am considering leaving the 2nd floor and basement unfinished rather than cheap out on the house shell. The builder I am working with is advising…
Categories: Green Homes

Optimal Building Exit for Septic System

Green Homes 2 - Fri, 2023-01-13 18:12
Hello,I am working on the septic system placement for my house.  There are basic distance requirements in Idaho from the well of 100 ft. (partial circle on attached image) and…
Categories: Green Homes

HVAC Reality Check: Are Duct Systems Dumb or Essential with Corbett Lunsford

Green Homes 2 - Fri, 2023-01-13 17:34
Here's a very good video from Corbett Lunsford's Youtube channel "Home Performance" where he discusses the advantages to using a ducted air system.
Categories: Green Homes

The Retrofit Podcast: Episode 1, Josh Salinger

Green Homes 2 - Fri, 2023-01-13 14:22
We kick off our new podcast series with a conversation about energy retrofits with Birdsmouth Design-Build's Josh Salinger
Categories: Green Homes

Working with XPS and ISO boards: Best glues, tapes, and circular saw blades

Green Homes 2 - Fri, 2023-01-13 13:07
The title almost says it all:- On an unvented roof, if I were to have a layer of polyiso or XPS (2"), topped by a layer of XPS (2"), which…
Categories: Green Homes


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