Greenhouse Climate & Heating Requirement Calculator

Peak heat loss (kW) and annual heating energy (kWh) for a horticultural greenhouse — sizes the boiler/heater and estimates the fuel bill for glass, twin-wall polycarbonate or single-poly houses.

Length (m)

Width (m)

Ridge height (m)

Eave height (m)

Glazing

Night set-point (°C)

Design outdoor temp (°C)

Heating degree days (base 15 °C, per year)UK London 2000, Berlin 3000, Stockholm 3800, Athens 1000. GDD tables for horticulture use base 15 °C.

Fuel

Result

Footprint: 160 m²
Glazed envelope area: 323 m²
Peak heat loss (design night): 19.37 kW
Recommended heater size: 23.25 kW
Annual heating demand: 55,794 kWh/yr
Annual fuel cost (gas): €5,458/yr
Cost per m² of footprint: €34/m²/yr

Enjoy Calcurly.com ad-free — go Premium