Heat Pump Flow Temperature Calculator

Calculate the optimal flow temperature for your heat pump based on outdoor conditions, system design parameters, and target indoor temperature. This free calculator helps you optimize your heat pump's efficiency by determining the correct flow temperature using weather compensation principles.

System Design Parameters

Design Heat Loss (6 kW)

Design Outside Temperature (-3°C)

Indoor Design Temperature (21°C)

Design Radiator Output at ΔT50 (10 kW)

Current Conditions

Target Indoor Temperature (21°C)

Current Outside Temperature (10°C)

Heat Pump ΔT (Flow - Return) (5°C)

Calculated Results

Required Flow Temperature

--°C

Required Flow Rate

-- L/min

Estimated COP

Heat Load

-- kW

Return Temperature

--°C

Electrical Power

-- kW

Flow Temperature vs Outdoor Temperature

Weather Compensation Curve Current Setting

How it works:

This calculator uses weather compensation curves to determine the optimal flow temperature. It calculates the current heat load based on the difference between indoor and outdoor temperatures, then determines the flow temperature needed to deliver that heat through your radiators. The flow rate is calculated based on the heat output and the temperature difference (ΔT) across the heat pump.