HVAC

What size AC or heat pump?

A quick ballpark tonnage from floor area, plus a replacement-system price range to sanity-check a quote.

Your inputs

Floor area (sq ft)

Climate

Ceiling height (ft)

Sun and insulation

Estimated size

Nearest real size3 tons / 36,000 BTU/hrEstimated capacity

Replacement-system range

$6,000 - $13,500

An estimate only, NOT a substitute for an ACCA Manual J load calculation. Rules of thumb ignore insulation, windows, orientation, air leakage and duct losses, so the real size can be a full ton off, and heat-pump HEATING in cold climates especially needs a pro. Oversizing makes an AC short-cycle and skip dehumidification. Prices are broad 2026 ballparks, not quotes, and exclude rebates.