♨️

Heat Pump Sizing Calculator

Free

Calculate heat pump power needed based on area, insulation and climate zone. Economic comparison and CO₂ savings.

Compliant with NF EN 378 / NF EN 14511 / RE2020

🏠Building characteristics
m\u00b2
m
\u00b0C
\u2668\ufe0fHeat pump
pers.

📊Sizing & profitability

♨️Recommended HP power

10kW

SCOP average

3,2

💰Annual savings

+717€/an

🌱CO₂ avoided/year

3.1t CO₂

Sizing
Heat loss : 6.3 kW
DHW need : +1 kW
Gross power : 7.3 kW
With margin : 8.4 kW
Ratio : 56 W/m\u00b2
Annual comparison
Old system : 1,664 \u20ac/an
HP : 947 \u20ac/an
Savings : 43%
Investment
Estimate : 4,500 \u20ac HT
Payback : 6.3 years
Needs : 13,310 kWh/an
💡
Favorable ROI (6.3 years). Don't forget subsidies: MaPrimeRénov', CEE, éco-PTZ.
📐 Calculation method
Déperditions = 150 m² × G × ΔT / 30 ΔT = 20°C - (-8°C) = 28°C P_PAC = (Déperditions + ECS) × marge sécurité Conso élec = Besoins thermiques / COP

G = heat loss coefficient by insulation level. Safety margin 15% (air-water) or 10% (geothermal). COP varies by technology.

Standards & regulations

  • NF EN 378Systèmes de réfrigération et pompes à chaleur — Sécurité et environnement
  • NF EN 14511Climatiseurs, PAC et déshumidificateurs — Conditions d'essai et performances
  • RE2020Réglementation environnementale bâtiments neufs
  • F-Gas UE 517/2014Réglementation fluides frigorigènes
  • NF C 15-100Installations électriques basse tension

This tool provides indicative estimates. Results do not substitute professional advice. Always verify with current regulations.

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