small office cabin hydronic heating with air-to-water heat pump

Hi,I am building a 420 ft2 home office cabin that will also serve as a sleeping cabin when we have guests in our main house.  In the main house I…

Can cross-wiring in a Mitsubishi multi-split system cause evaporator coil failure?

I'm seeking expert opinions on whether a cross-wiring installation error in a Mitsubishi multi-split system could lead to evaporator coil failure. Here are the key details:1. System: Mitsubishi multi-split with…

Consolidating multiple exhaust vents

We're preparing to begin our mechanical rough in on a new construction home in climate zone 6a. Between make-up air and exhaust, we will need 7 penetrations, and this is…

Increase R value for closed cell attic/ roof ventilation?s

I currently have what I believe is a closed cell foam on the roof underside. Resulting in my attic being the most comfortable space in my home. There is a…

Simplified Radon

Hello all,Have you seen The Build Show architect Steve ? describe this very simplified radon system?  It is at 15 minutes into the 20 minute show."Radon Mitigation" Build Show Build:…

ERV vs Dehumidifier vs Alternatives in Tiny Home

Hello all. I've got a tiny house on wheels located near Nelson, BC, and it has frequent moisture problems. I'm trying to determine the best course of action to resolve…

Retrofit Wall Cavity Insulation

Hello.South Louisiana home constructed approximately 1867.The question relates ONLY to the front wall of the home which is approximately 12′ high (interior) x 36′ wide (interior). The front wall has…

Perfect Second Home

Cathedral Ceiling Insulation

I have a home built in 1978 that uses 2x12 rafters. There are fiberglass batts between the rafters, it looks like two 6" paper faced bats with one paper face…

Mitsubishi Mini split

We recently installed mini splits, which will eventually be run by a solar system. In the night, the electric went off, then came back on again, but the mini splits…