Inputs
Estimated Results
Cooling
—
tons
Cooling
—
BTU/hr
Supply CFM
—
CFM
Heating
—
MBH
SF / Ton
—
ft² per ton
CFM / SF
—
CFM per ft²
Rule-of-thumb estimates only — not a substitute for a Manual J or block load calculation. Use for early feasibility and equipment pre-selection.
Reference — Typical Ranges
| Building Type | SF / Ton | CFM / SF | Heat (BTU/SF) |
|---|---|---|---|
| Office | 300–400 | 0.8–1.2 | 25–40 |
| Retail | 200–300 | 1.0–1.5 | 30–50 |
| Restaurant | 100–200 | 1.5–2.5 | 50–80 |
| School | 250–350 | 1.0–1.5 | 30–50 |
| Medical Office | 200–300 | 1.0–1.8 | 35–55 |
| Warehouse | 500–800 | 0.3–0.6 | 10–20 |
| Hotel | 350–500 | 0.7–1.0 | 20–35 |
| Residential | 400–600 | 0.5–0.8 | 20–35 |
| Server / Data | 50–150 | 2.0–5.0 | — |