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FOUNDER-BUILT HOUSE

Grand Junction
home project.

1,400 ft² · all-electric · Grand Junction, CO · Climate Zone 5B

Michal is building the entire house. It inspired Isotherm and provides a full-scale application of the workflow.

8,350 Btu/h

Design heating load

Whole house at 20 °F outdoor · calculated

R-26.1 effective

Wall assembly

2×6 + ZIP R-9 · 22% framing · calculated

R-105.5 effective

Roof assembly

5 in ccSPF + 19 in cellulose · parallel path

ANNUAL SOLAR EXPOSURE · MODEL OUTPUT

When does the south glass see the sun?

180 ft² south glazing · Hourly · full year · Geometry from building plans

Annual chart showing the fraction of 180 square feet of south glazing in direct sun by hour and month

HOURLY INDOOR, SLAB, AND OUTDOOR TEMPERATURES

Indoor air, slab surface, and outdoor temperature from 1–5 January.

A five-day free-float run shows how the house responds when the heating system is off. The slab surface and indoor air are plotted against the outdoor temperature on one time axis.

Indoor air, slab surface, and outdoor temperatures from 1 through 5 January with no heating