Cascade Heat Pumps, 2 x 16kW, Barnet EN4
A house with a heating demand one heat pump could not meet. Two Samsung Gen 7 16kW units run together, 32kW in all, staged on and off by their own controls.
- PropertyLarge detached house
- Output32kW combined
- Postcode areaEN4
Two 16kW heat pumps in cascade for a large house in Barnet
We designed and installed two Samsung Gen 7 16kW high temperature heat pumps in cascade for a large detached house in Barnet EN4, giving 32kW of combined output. Samsung's cascade controls stage the two units on and off, share the running hours between them and keep the house warm on one if the other is being serviced. Hot water comes from a 460-litre indirect unvented cylinder with a 28.54kW coil, and a 200-litre buffer tank separates the heat pumps from the heating circuits. The units run on R290 and have a SCOP of 4.51.
The heat loss survey put the house's demand above what any single domestic heat pump delivers. Two 16kW units in cascade meet it, and on milder days only one needs to run, which is more efficient than one oversized unit at part load. Flow and return to each unit are in insulated copper with isolating valves on each leg. Either unit can be shut down and worked on while the other keeps the house warm.
A 460-litre cylinder with a large 28.54kW coil recovers quickly after heavy use, and the 200-litre buffer with a secondary pump keeps the system hydraulically stable however many zones are calling.
The job in short
- Where: Barnet EN4, London Borough of Barnet
- Property: Large detached house
- Heat pumps: Two Samsung Gen 7 16kW (AE160CXYBEK), R290, in cascade
- Output: 32kW combined
- Hot water: UK Cylinders 460-litre indirect unvented, 28.54kW coil
- Also fitted: 200-litre buffer tank, secondary circulation pump
- Efficiency: SCOP 4.51
- Paperwork: MCS, DNO notification, Building Control; 7-year Samsung warranty
Photos from the job
Thinking about a heat pump in Barnet?
We measure every room, calculate the heat loss, check the radiators and the space for a cylinder, and send a written price with the grant already taken off. No cost and no obligation.
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