Spray Foam Insulation in Nisku, AB.

The climate figure here is borrowed, but from unusually close by. EDMONTON INT'L A (climate ID 3012205) is about 3 km away — the shortest station distance recorded anywhere in this ledger, since Edmonton International Airport sits essentially next door: 5,697 heating degree days at an 18 °C base, an average January daily minimum of -18.1 °C, -44.4 °C at the recorded extreme. Leduc and Beaumont are assigned the same station, so all three carry identical figures.

The Nisku Business Park was founded in 1972 by the Sparrow family — Bert, Jim, Murrey and Don Sparrow — and now covers 2,044 hectares (5,050 acres), described in one source as "as large as all of downtown Toronto from the waterfront to Forest Hill" (Wikipedia). Sources disagree on its current scale: Wikipedia cites 400+ businesses and 6,000+ workers, while leduccountybusiness.com cites 800+ businesses. That discrepancy is recorded here rather than resolved, because the ledger could not resolve it.

Beyond the existing park, the Nisku Major Employment Centre Area Structure Plan covers roughly 3,782 hectares (9,345 acres), guiding continued industrial and commercial growth (Leduc County planning documents). Leduc County levies no business tax within the park.

At that scale the building stock is the point. Energy-services and heavy-industrial shells — high-bay shops with large door openings, cold storage, offices tucked into a corner of an unconditioned building — are structures where the envelope is a single continuous surface rather than a set of framed cavities, and where what it costs to hold a temperature is decided by how continuous that surface actually is.

"The Vistas," a country-residential acreage community, sits immediately east of the park's historic core — the one residential building type the ledger records in Nisku. Acreage houses are typically larger and more geometrically complex than town lots, with attached shops and outbuildings that owners often want conditioned later.