Spray Foam Insulation in Three Hills, AB.

75.5% single-detached against 54.9% pre-1980: mostly older houses, mostly freestanding. The ledger also records 68.4% homeownership here, notably below Kneehill County's 74.7% — so roughly three in ten dwellings are rented.

That split changes who decides. In an owner-occupied older house, the person feeling the draught at the baseboard is the person who can approve sealing the attic plane above it. In a rented one, the heat loss and the capital decision sit with different people, and older rented stock therefore tends to be the last part of a town's building inventory to get an envelope upgrade — which is exactly where the largest per-dwelling losses usually are.

Three Hills sits about 100 km from RED DEER REGIONAL A (climate ID 3025480), the station this ledger assigns it: 5,619 heating degree days at an 18 °C base, an average January daily minimum of -17.6 °C, -43.8 °C at the recorded extreme. One hundred kilometres is one of the longest borrows in this set, and the town lies out on the prairie southeast of the station rather than in the same corridor — the figure is regional context, not a local measurement.

Prairie College — founded in 1922 as the Prairie Bible Institute — occupies a 130-acre campus that was annexed into the town by the mid-1980s, and is a major local institution and employer. A campus of that age is a set of buildings spanning most of a century, from interwar structures to post-annexation additions, all running on one operating budget. The envelope standard changes building by building across a single site.