Recommended Boiler Power
0
kW
| Power (kW) | 0 |
| Power (BTU/h) | 0 |
| Power (kcal/h) | 0 |
| Power (W) | 0 |
| Area (m2) | 0 |
| Area (ft2) | 0 |
Display Settings
This calculator estimates the required boiler power based on floor area and climate zone. Enter your floor area, select the appropriate climate zone, and get the recommended heating capacity in multiple units.
Formula
Metric:
PkW = Am² × Cf
Imperial:
PBTU/h = Aft² × Cf
Where:
- P — Boiler power
- A — Floor area
- Cf — Climate factor
Climate Factors
| Climate Zone | Metric (kW/m²) | Imperial (BTU/h/ft²) |
|---|---|---|
| Mild (Southern regions) | 0.08 | 25 |
| Moderate (Central regions) | 0.10 | 32 |
| Cold (Northern regions) | 0.12 | 38 |
| Severe (Arctic regions) | 0.15 | 48 |
Unit Conversions
- 1 kW = 3,412.14 BTU/h
- 1 kW = 859.845 kcal/h
- 1 kW = 1,000 W
- 1 m² = 10.7639 ft²
Calculation Examples
Example 1: 100 m², Moderate climate
P = 100 × 0.10 = 10 kW (34,121 BTU/h)
Example 2: 1,500 ft², Mild climate
P = 1,500 × 25 = 37,500 BTU/h (10.99 kW)
Example 3: 200 m², Cold climate
P = 200 × 0.12 = 24 kW (81,891 BTU/h)
Example 4: 2,000 ft², Moderate climate
P = 2,000 × 32 = 64,000 BTU/h (18.76 kW)
Example 5: 80 m², Mild climate
P = 80 × 0.08 = 6.4 kW (5,504 kcal/h)
Example 6: 300 m², Severe climate
P = 300 × 0.15 = 45 kW (45,000 W)
Example 7: 1,000 ft², Cold climate
P = 1,000 × 38 = 38,000 BTU/h (11.14 kW)
Example 8: 150 m², Moderate climate
P = 150 × 0.10 = 15 kW (12,898 kcal/h)
Example 9: 2,500 ft², Severe climate
P = 2,500 × 48 = 120,000 BTU/h (35.17 kW)
Example 10: 50 m², Cold climate
P = 50 × 0.12 = 6 kW (6,000 W / 20,473 BTU/h)