HVAC Sizing in Utah: Get It Right the First Time

Undersized HVAC is the single biggest complaint Utah homeowners have after new installs. In a climate with 100°F summers and sub-zero winters, getting the load calculation right is critical.

Why Utah Is Different

• Extreme temperature swings: -10°F to 105°F in Salt Lake Valley
• High altitude: Lower air density affects system efficiency
• Dry climate: Evaporative cooling is viable (and cheaper) in northern Utah
• Mountain zones: Snow loads require balanced duct pressure calculations

General Sizing Guide

These are rough guidelines only — always get a Manual J load calculation:

| Home Size | Recommended BTU | Tonnage | |---|---|---| | Up to 1,000 sqft | 18,000–24,000 | 1.5–2 ton | | 1,000–1,500 sqft | 24,000–30,000 | 2–2.5 ton | | 1,500–2,500 sqft | 30,000–48,000 | 2.5–4 ton | | 2,500–4,000 sqft | 48,000–72,000 | 4–6 ton |

Don't Skip the Manual J

A proper Manual J load calculation accounts for insulation levels, window area, orientation, and local climate data. Any HVAC contractor worth hiring will perform one.

Evaporative vs. Refrigerant Cooling

In northern Utah's dry climate, evaporative coolers (swamp coolers) can cool effectively for 60–70% less operating cost — but fail in high-humidity periods. Most new builds use split systems for reliability.

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