Heat pumps
How heat pumps work, their types, where they are used and how to choose one.
Heat pump electricity consumption: how much power does it use?
How much electricity does a heat pump use? We explain COP and SCOP, the effect of outdoor and leaving water temperature, and a worked example with clearly stated assumptions.
Heat pump drying: how fruit, vegetables and nuts are dried
Drying in a closed loop, at low temperature and with controlled humidity: why it protects product quality, how capacity is sized and how a dryer's heat pump module is designed.
Heat pumps on ships and boats: seawater-source systems
Seawater is a heat source whose temperature barely changes through the day. How is a heat pump connected on board, how is heat distributed to cabins, and why do space and vibration matter?
Absorption heat pump: a heat-driven cycle and where it is used
How an absorption heat pump runs on heat instead of a compressor, which working pairs it uses, and when it makes more sense than an electric heat pump.
What is a heat pump and how does it work? Cycle, COP and uses
A heat pump does not burn fuel to make heat; it takes heat from the outdoor air and moves it indoors. The four steps of the cycle, why 1 kW of electricity gives several kW of heat, and more.
Heat pump types: air, ground and water source systems
Heat pumps differ by where they take heat from and how they deliver it. We compare air, ground and water source systems, monobloc and split designs, and hybrid solutions.
Choosing a heat pump: what to check before you buy
The right heat pump is chosen for the climate, the heat loss and the water temperature of the heating system. The Poyraz, Boran, Vaha and Ayaz series, indoor units and what a quote needs.
Heat pump FAQ: frequently asked questions and answers
The 14 questions we hear most about heat pumps: cold climates, capacity, radiators and underfloor heating, hot water, electricity use, solar energy, noise and installation space.
Heat pump applications: where are heat pumps used?
Heat pumps are used from homes and greenhouses to factory waste heat, pools and ships. What sets the capacity in each application, and which product fits where?
Pool heating heat pump: sizing by surface, cover and season
A pool's heat demand depends more on its surface, cover and season than on its volume. A first heat-up calculation for a 70 m³ pool shows how capacity is chosen.
Is a heat pump noisy? Sound levels, dB(A) and placement
Placement matters as much as the unit. How to read dB(A) figures, what distance and walls do, and where to put the outdoor unit, with the sound levels of AD models.
Heat pump vs chiller: same cycle, different job
A chiller makes chilled water, a heat pump makes heat. Design temperatures, efficiency measures, heat recovery, and which one to choose from homes to factories.
Environmental impact of heat pumps: CO₂, electricity and refrigerants
A heat pump's impact depends on where its electricity comes from, how efficient it is and its refrigerant. A worked CO₂ example and an R290, R32, R410A comparison.
A brief history of the heat pump: from Carnot to inverters and R290
The heat pump's story: a theory in 1824, a working system at a saltworks in the 1850s, a heated city hall in Zürich in 1938, and the inverter and R290 units of today.