Green Homes News

Heat pump system for a 5-plex?

Green Homes 2 - Tue, 2023-03-21 09:09
I have a 5-plex that has 4 700 sq-ft 1 br apts, 2 on main floor, 2 on second floor (each with large living room, eat-in kitchen, medium sized bedroom,…
Categories: Green Homes

Hydrogen Holds Promise as a Natural Gas Replacement in the U.K.

Green Homes 2 - Tue, 2023-03-21 02:00
But many challenges remain before it can become a serious option
Categories: Green Homes

Repurpose abandoned ductwork?

Green Homes 2 - Mon, 2023-03-20 23:11
About 18 months ago I finally installed a couple of ductless minisplits in my ~1600sf single story house.  The furnace and ductwork were located in an unconditioned attic.  Is there…
Categories: Green Homes

Anybody using heat pumps + boilers w/Kumo Station?

Green Homes 2 - Mon, 2023-03-20 21:29
I'm doing a whole-house renovation (100 yr old brick home in Zone 5) and have supplemented the original steam boiler system with a dual-zone Mitsubishi system (one SVZ blower per…
Categories: Green Homes

50 gallon hybrid hot water tank too small

Green Homes 2 - Mon, 2023-03-20 21:23
We were given a Bosch hybrid hot water tank from our power utility for free, it was brand new but very old, has to be one of the first ones…
Categories: Green Homes

Zone 7, new tight house excessively dry

Green Homes 2 - Mon, 2023-03-20 20:46
New house build in zone 7. First full winter in the home. House is .2 ACH50. Fully electric with a Mitsubishi heat pump and air handler ducted throughout the home.…
Categories: Green Homes

Convert propane combi-boiler with air source heat pump

Green Homes 2 - Mon, 2023-03-20 19:19
Hi like-minded people! I live at 8000 ft amsl in SW Colorado and have a pv system that powers my home utilizing our utility’s net metering program. But, I rely…
Categories: Green Homes

Is it possible to build a floating fence?

Green Homes 2 - Mon, 2023-03-20 19:05
Hey hope everyone is doing well. I planted hemlocks about 5 years ago for privacy in my small yard. The hemlocks have grown but they take up a considerable amount…
Categories: Green Homes

double-stud wall with vapor-barrier on exterior-side of interior-wall

Green Homes 2 - Mon, 2023-03-20 16:24
considering a double-stud wall with an integrated-service-cavity as described here: also read below from here:> In taller walls, it’s important to connect the inner and outer studs for…
Categories: Green Homes

Flangeless window install with exterior insulation

Green Homes 2 - Mon, 2023-03-20 15:47
I’m thinking our wall assembly will be 2x6 with ZIP sheathing and 3” of Rockwool Comfortboard 80 external insulation. Hoping for quality flangeless windows that are recessed into the wall…
Categories: Green Homes

Exterior Rigid Polyiso Foam Insulation

Green Homes 2 - Mon, 2023-03-20 15:19
Hi! I currently I have a home in zone 3C (Bay Area) which has an old portion with two rooms all under one gable roof line. One of those rooms has…
Categories: Green Homes

Landscape Fabric Over Wet Substrate

Green Homes 2 - Mon, 2023-03-20 12:52
Working on the gravel driveway and it just rained all over my nicely leveled ground. Should the dirt be dry before I put the fabric down and cover it with…
Categories: Green Homes

Heat Pump Installers

Green Homes 2 - Mon, 2023-03-20 11:55
I'm in Southeast Wisconsin, and I'm looking for an HVAC contractor willing and able to install heat pumps.  The guy I've been using for years tried to talk me out…
Categories: Green Homes

Exterior roof insulation

Green Homes 2 - Mon, 2023-03-20 11:21
Whats the best detail for mineral wool exterior insulation on a sloped roof as follows: Climate zone 4 PNW location so fire prevention important. Slope 1 in 4 Metal roof…
Categories: Green Homes

Original Skylight in Bathroom

Green Homes 2 - Mon, 2023-03-20 11:05
We have an original skylight in a bathroom in an old DC rowhouse.  There is a door (36” x 36”) several feet below the skylight that rocks open when you pull…
Categories: Green Homes

HUCE Special Seminar

Green Homes - Mon, 2023-03-20 10:00
Location: HUCE Seminar Room 440, 26 Oxford St., Cambridge

"Tracking Flows of Carbon at the Global Scale: What we’ve learned from atmospheric measurements" with Ralph Keeling, Professor of Geochemistry, Scripps Institution of Oceanography, University of California, San Diego.... Read more about HUCE Special Seminar

Categories: Green Homes

Energy Policy Seminar

Green Homes - Mon, 2023-03-20 10:00
Location: 414AB, David T. Ellwood Democracy Lab, Rubenstein Building, 79 JFK St., Cambridge

Jim Stock, Vice Provost for Climate and Sustainability, will present "What's Up with Natural Gas Prices? The Climate Implications of U.S. LNG Facilities."... Read more about Energy Policy Seminar

Categories: Green Homes

R-Value Increase vs Fuel Usage

Green Homes 2 - Mon, 2023-03-20 09:24
My first question on this forum! We have an 1800's stone house in Pennsylvania (border of 4A and 5A zone) and are slowly remodeling, starting with our kitchen. Obviously there…
Categories: Green Homes

HP vs Propane vs Oil vs Natural Gas

Green Homes 2 - Mon, 2023-03-20 07:35
It's decision time or close to it for my project. It's comprised of a very old home to renovate with a new detached garage that will have an apartment above.…
Categories: Green Homes

Please help me evaluate these wall options

Green Homes 2 - Mon, 2023-03-20 06:38
In the attached image I'm showing 3 wall design options (A, B, & C) that I'm trying to evaluate and select from. My criteria are listed below. Please let me…
Categories: Green Homes


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