Green Homes News

Has any one else used AI to run an energy model on their house?

Green Homes 2 - Sun, 2026-01-25 16:35
In the past few months I've been using the free versions of the mentioned AI platforms to run energy models on the deep energy retrofit I'm working on. The process is…
Categories: Green Homes

Attic Chimmney Chase Insulation

Green Homes 2 - Sun, 2026-01-25 12:03
I have a serious icicle roof issue on a 1970 raised ranch. The first thing I want to insulate is my open chimney chase, see pictures. Should I just frame…
Categories: Green Homes

Concrete free slab with FPSF and PWF using Glavel – second attempt

Green Homes 2 - Sun, 2026-01-25 09:48
I think I screwed up the posting of sketch so trying this again.Looking at an approximately  16′ x 28′ one story main bedroom addition in climate zone 6A on well…
Categories: Green Homes

Best supplemental heat for extreme cold

Green Homes 2 - Sun, 2026-01-25 07:18
We just built our passive house in Northern Wisconsin. It is ICF construction with a Carrier mini split system. This is our first winter here and January has brought a…
Categories: Green Homes

Insulating low-slope residential roof

Green Homes 2 - Sun, 2026-01-25 00:39
Hello and thank you for advise. I really appreciate everything I have learned from this site so far. I have read insulating low pitched article and comments after the roof…
Categories: Green Homes

Where should a foot drain be in a “michigan” basement?

Green Homes 2 - Sat, 2026-01-24 20:28
Not the state of Michigan. An old cellar that was dug out to a basement. it’s defining feature is an outer three foot foundation, then a two or three foot ledge…
Categories: Green Homes

Zone 4A – Cathredal Attic Insulation at Roof Valley

Green Homes 2 - Sat, 2026-01-24 18:03
Hi allI am in the process of building a two story, wood framed, L-shaped house in climate zone 4A. One part of the building will have the underside of the…
Categories: Green Homes

Max length of ERV fresh air intake duct?

Green Homes 2 - Sat, 2026-01-24 13:38
I'm planning to retrofit an erv system in my finished home. My options for running the fresh air duct are limited. One option is to have a 20 foot run…
Categories: Green Homes

Suggestions on Basement Insulation Approach

Green Homes 2 - Sat, 2026-01-24 13:24
Hi there GBA,After reading through a number of articles and forum posts I've started trying to insulate my walkout basement.  I am in zone 6a and am using 1.5" Thermax…
Categories: Green Homes

BTRboard: Green building for the masses?

Green Homes 2 - Sat, 2026-01-24 12:11
This product is being touted as "The Most Advanced Wall Sheathing" system and is getting incorporated by some major home building companies here in Zone 7 country. It's a system…
Categories: Green Homes

Concrete free slab with FPSF and PWF using Glavel

Green Homes 2 - Sat, 2026-01-24 12:08
Looking at an approximately  16' x 28' one story main bedroom addition in climate zone 6A on well drained coarse sand with daylight not far down hill.  This is my…
Categories: Green Homes

A question about window SHGC ratings

Green Homes 2 - Sat, 2026-01-24 02:09
A question about window SHGC ratings -I understand a low SHGC helps to block unwanted heat gain through windows.But if a window is fully shaded, such as within a deep…
Categories: Green Homes

Challenges with heat distribution between levels

Green Homes 2 - Fri, 2026-01-23 17:56
We’re struggling in our current house with heat.  It’s a 19th century farmhouse that I rebuilt to the best of my amateur ability.If we heat the lower level to 70…
Categories: Green Homes

Any experience with Micro-Air EasyStart?

Green Homes 2 - Fri, 2026-01-23 12:46
After uploading the data plate images for the compressor (Trane XB13), air handler, interface module, ERV, and thermostat, Gemini AI said that it was good equipment and should produce heat…
Categories: Green Homes

Rim Joists with two layers of rigid EPS foam

Green Homes 2 - Fri, 2026-01-23 11:37
Hi,   I'm insulating the rim joists in my 125 year old home. There is currently nothing but wood there (and an anti mold spray from a recent remediation). Due to…
Categories: Green Homes

Attic Ventilation and HVAC

Green Homes 2 - Fri, 2026-01-23 05:27
My HVAC contractor installed HVAC in the attic along with a dehumidifier. We have a ridge vent along with soffit vents. Attic is air sealed with R60 insulation. We will…
Categories: Green Homes

The Cold North: How “green” is new construction versus rehab of old houses?

Green Homes 2 - Fri, 2026-01-23 04:47
It seems to come up all the time as freezing temps dominate our northern winters.Is energy efficient new construction really “green” compared to deep energy retrofits to old housing stock?…
Categories: Green Homes

Experience with North American tilt and turn window suppliers?

Green Homes 2 - Fri, 2026-01-23 02:03
Shopping for tilt and turn windows (Zone 5 climate) and found Seemray.com offering fiberglass frames with German hardware. Anyone here used them or similar NA-made European style windows? Curious about…
Categories: Green Homes

Oversizing HRVs and ERVs: How Much Energy Can It Save?

Green Homes 2 - Fri, 2026-01-23 02:00
Oversizing HRVs and ERVs may improve IAQ, comfort, and energy performance—and the math often supports the investment.
Categories: Green Homes

Climate Zone 5 Manual J Calc Question

Green Homes 2 - Thu, 2026-01-22 20:55
Our project is a chainsaw retrofit in Climate Zone 5. We cut off the eaves and the building is air sealed from the sill to the ridge. We are installing…
Categories: Green Homes

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