- Removing the drywall and 30 year old fiberglass batt insulation from the exterior shell and replacing it with closed cell foam insulation. Also removing the batt under the house and replacing it with closed cell foam. A thermal imaging test showed holes in the insulation at various places in the house.
- Installing a Heat Recovery Ventilation (HRV) system to maintain air quality when the windows are closed and to recover heat (or cool) when stale air is exhausted.
- Removing the gas hydronic boiler and installing a geothermal heat pump with hydronic heating and forced air air conditioning.
- Replacing the gas fired tank water heater with an on-demand electric hot water heater. The gas fired water heater has a pilot and the water often becomes luke warm if the pilot is off in the summer and we don't use any hot water for a few days. We get all of our hot water in summer from the solar thermal system.
- Replacing the current solar PV system with new panels that generate 2x as much power from the same amount of area (reminds me of the progress in PCs in the 1980's).
- Replacing the old, hand-started pellet stove with a 94% AFUE gas fire place.
- Putting in automatic thermal shades on the ridge skylight to reduce thermal losses through the glass in winter.
- A bunch of other aesthetic and structural work including refinishing the hardwood floors, retexturing the drywall and painting, putting a skylight in the living room, blocking up the unused forced air heating vents in the floor, removing ceiling fans, and replacing the carpet upstairs.
The house will, in the end, generate more energy than it uses. We intend to use the extra for an electric car and for our current plug-in Prius conversion.
Now for some pictures. Here's the pellet stove that we'll replace with a gas fireplace:
Here's a picture of one of the ceiling fans in the family room that will be removed:
Here's a picture of the space above the upstairs bath entrance that will be converted into a mechanical closet for one of the two HRV systems and the on-demand electric hot water heater:
We'll be donating the hydronic furnace, hot water heater, insulation under the house (it's only 4 years old), and the ceiling fans to charity so that somebody can reuse them.
In the coming 4 months, you'll be hearing how the work is going.