7 ft20 ft
Estimated Cooling Capacity
0.00
TONS
Area—
Climate Zone—
Recommended Unit—
HVAC Tonnage Formula
Tons = (Area ÷ 500) × Climate_Factor × Sun_Factor × Insulation_Factor × Ceiling_Factor
How to use:
- Enter your total area in square feet (required).
- Select your US Climate Zone — hotter regions need more cooling.
- Adjust sun exposure — south-facing windows increase load.
- Set your insulation quality — poor insulation means more tonnage.
- Adjust ceiling height — taller ceilings increase air volume.
Base rule: 1 ton of cooling per 500 sq ft (standard 8ft ceiling, average climate).
1 Ton = 12,000 BTU/hr of cooling capacity.
Quick Reference — Room Size vs. HVAC Tonnage
Based on standard 8 ft ceilings, average climate (Zone 4), medium sun exposure, and average insulation.
| Area (sq ft) | Tons | Recommended |
|---|---|---|
| 500 | 1.0 | 1 Ton |
| 1,000 | 2.0 | 2 Ton |
| 1,500 | 3.0 | 3 Ton |
| 2,000 | 4.0 | 3.5–4 Ton |
| 2,500 | 5.0 | 5 Ton |
| 3,000 | 6.0 | 5+ Ton |
