Heating Needs Calculator

Estimate peak heating power and daily energy demand from area, insulation, ΔT and infiltration.

Building & Climate

Floor area (m²) Average ceiling height (m) Insulation level

Indoor setpoint (°C) Outdoor design (°C) Infiltration (ACH @ design)

Rule of thumb: 1 ACH adds ~0.33·V·ΔT W of loss (V in m³). ΔT = T_in − T_out.

System & Fuels

Heater efficiency (%) Wood energy (kWh/kg) Propane energy (kWh/kg)

Valores típicos: madera aire-seca ~3.8–4.3 kWh/kg; propano ~13.6 kWh/kg (PCI).

Results

Peak fabric loss — kW H·A·ΔT (H per m² · area · ΔT)

Peak infiltration loss — kW 0.33·ACH·V·ΔT

Total peak heat loss — kW — BTU/h

Daily energy (24 h @ peak) — kWh/day Para dimensionar combustible en días muy fríos.

Wood needed (per day) — kg/day Incluye eficiencia del equipo.

Propane needed (per day) — kg/day Eq. aprox. a garrafas de 13 kg.