A Samsung heat pump
with two heating zones in Enfield
An 8kW Samsung Gen 7 sized from a heat loss survey, a 300-litre cylinder for a family's hot water, and the house split into two zones so each part is heated on its own schedule.
- Our own job, photographed on the day
- Free survey and a fixed written price
- MCS certified, NICEIC approved electrics
Accredited, and fitting the brands you know
We fitted a Samsung Gen 7 8kW air source heat pump to a family home in Enfield EN3, with a Joule 300-litre unvented cylinder and a two-zone heating system. The size came from a room-by-room heat loss calculation, not from the size of the old boiler.
The unit runs on R290, a refrigerant with a global warming potential of 3, and carries Samsung's 7-year warranty through our approved installer status. The cylinder's stainless inner vessel has a 25-year warranty.
How the job was done
Step by step, in the photographs taken on site.
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1
Sized from the heat loss, not the boiler
The survey measured every room and worked out how much heat each one loses on a cold day. That total, not the rating of the gas boiler it replaced, is what set the heat pump at 8kW.
A heat pump sized too big cycles on and off and wears out sooner; one sized too small cannot keep up in January. The calculation is how you avoid both.
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2
Tight to the flank wall
The outdoor unit stands against the side wall on anti-vibration feet. It uses none of the garden anyone would actually sit in, and the pipe run to the cylinder inside stays short, which keeps the heat losses on the way down.
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3Two zones, two schedules
The house is split into two heating zones with their own controls, so the part of the house in use can be warm without heating the part that is not. The 50-litre buffer tank keeps the heat pump running smoothly when one zone closes and the other stays open.
Anti-freeze valves on the outdoor pipework drain it if the power is ever off in a freeze, so a winter power cut cannot split a pipe.
Thinking about a heat pump?
What this job involved, applied to your own house.
Air source heat pumps
Whole-house heating with the £7,500 grant
Air source heat pumpsWhat a heat pump costs
Ten real quotations, before and after the grant
What a heat pump costsHeat pump or air conditioning?
Which one a house actually needs
Heat pump or air conditioning?Air-to-air heat pumps
Heats and cools, room by room
Air-to-air heat pumpsEnfield EN3: questions about this job
Why does a heat pump need a buffer tank?
Not every system does. Where the heating is split into zones, a buffer gives the heat pump a steady volume of water to heat when only one small zone is calling, so it runs in long even cycles instead of starting and stopping.
The survey decides whether yours needs one.
Can a heat pump heat a 300-litre cylinder?
Yes. A cylinder made for a heat pump has a larger coil so it heats properly at the lower temperatures a heat pump produces. It is sized for the household, and 300 litres suits a family home with a bath and several showers.
More of our finished work
Other jobs we have photographed. Tap one for the project.
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On its own slab set clear of the fence line, with the condensate taken away below ground level instead of being left to run across the paving and freeze.
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Book a free heat pump survey
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.
Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed
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