What heat pump output do I need?
Heat pump output is determined by the heat loss of the house, not by its floor area. Why an accurate design matters and what documents to prepare.
Read moreHeat Pumps
Everything about heat pumps: the principle, output, costs, installation, noise, subsidies and suitable solutions for new builds and older houses.
Article list
A heat pump for an old house with radiators
Can a heat pump be used in an old house with radiators? Yes, but the heat loss and radiator water temperature need to be assessed, and a high-temperature variant may be required.
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Underfloor heating and a heat pump: why they complement each other
Underfloor heating works with a low water temperature, making it the ideal partner for a heat pump. The benefits, cooling through the floor and a comparison with air conditioning.
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Weather-compensated heat pump control: how to set the heating curve
Weather-compensated control sets the heating water temperature according to the outdoor temperature. How the heating curve works and why its setting has a major effect on consumption.
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A heat pump and a backup heat source: fireplace, boiler or electricity
Does a heat pump need a backup source? How the electric backup heater works, when it makes sense to keep a boiler or fireplace, and what the bivalent point is.
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How to reduce heat pump consumption: 10 practical tips
Ten tips for reducing the electricity consumption of a heat pump: heating curve, water temperature, thermostatic heads, hot water, maintenance and photovoltaics.
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Heat pump heating costs: what increases and reduces them
What heat pump heating costs depend on and why some people pay little and others a lot. The most common causes of high bills and how to prevent them.
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Heat pump or gas boiler: a comparison
A comparison of an air-to-water heat pump and a gas boiler: investment, running costs, cooling, maintenance and suitability for different houses. No blanket promises of savings.
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Does a heat pump work in frost? Output, defrosting and myths
Yes, an air-to-water heat pump also heats in frost. How its output and efficiency change at low temperatures, why it defrosts and what is normal.
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How an air-to-water heat pump works
An air-to-water heat pump takes heat from the outdoor air and transfers it to the heating and hot water. The principle explained simply.
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