The house from the garden, with the solar panels across the rear roof.

A Mitsubishi Ecodan, solar and a battery
in Winchmore Hill

An 11.2kW Mitsubishi Ecodan designed room by room to run at 55°C, with ten solar panels on the rear pitch and a 9.5kWh battery.

Price my heat pump
  • 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

NICEIC approved contractorGas Safe RegisterMCS certifiedRECC, Renewable Energy Consumer CodeTrustMark, Government Endorsed QualityVaillantClivetSamsungDaikinMitsubishi ElectricBosch

We installed a Mitsubishi Ecodan 11.2kW heat pump with a 250-litre cylinder, a 4.45kW solar system of ten panels and a 9.5kWh battery in Winchmore Hill N21. Every room was checked against its existing radiators so the system could run at 55°C, which gives it a designed seasonal efficiency (SCOP) of 3.99.

A SCOP of 3.99 means almost 4 units of heat for every unit of electricity over a year. The £7,500 grant was applied, and at 32dB the unit sat within permitted development, so no planning application was needed.

How the job was done

Step by step, in the photographs taken on site.

  1. 1

    Every room checked

    The heat loss survey went room by room, comparing what each room loses on a cold day with what its existing radiator can give at 55°C. The design confirmed the radiators could stay, which kept the job simpler and the house familiar.

  2. The house from the garden, with the solar panels across the rear roof.
    2

    Solar on the rear pitch

    Ten panels across the rear roof slope give 4.45kW of generation. Through the middle of the day the heat pump can run on the house's own electricity, and the battery keeps the surplus for the evening.

  3. The Ecodan on its feet, standing off the boundary fence.
    3

    Sited off the fence

    The Ecodan stands far enough off the boundary fence that the fan does not blow straight back off it, which is what makes a badly sited unit sound louder than it is.

Every photograph from the job

4 photographs, no faces, nothing staged.

The house from the garden, with the solar panels across the rear roof.
The house from the garden, with the solar panels across the rear roof.
The Ecodan on its feet, standing off the boundary fence.
The Ecodan on its feet, standing off the boundary fence.
The unit from the side, with space kept round it.
The unit from the side, with space kept round it.
The inverter and battery on the wall indoors.
The inverter and battery on the wall indoors.

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 pumps

What a heat pump costs

Ten real quotations, before and after the grant

What a heat pump costs

Heat 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 pumps

Winchmore Hill N21: questions about this job

What is SCOP?

The seasonal coefficient of performance: how many units of heat a heat pump delivers for each unit of electricity, averaged over a year. 3.99 means almost four. It depends on the design flow temperature, which is why the room-by-room survey matters.

Do I need planning permission for a heat pump?

Usually not, if the unit meets the permitted development conditions, including the noise limit. This one measured 32dB, well within them.

More of our finished work

Other jobs we have photographed. Tap one for the project.

All 34 projects
Daikin multi-split condenser in New Southgate N11 Air conditioning N11 New Southgate Daikin multi-split condenser Wall-mounted on brackets rather than stood on the ground, which is usually what a narrow side return leaves you, and the refrigerant lines dropped in a single trunked run. Read the case study Samsung monobloc air source heat pump in Wood Green N22 Heat pump N22 Wood Green Samsung monobloc air source heat pump Stood on a levelled base built up out of the border rather than on soil, so the feet stay out of standing water and the unit does not settle out of level over a winter. Read the case study Samsung monobloc air source heat pump in Enfield EN3 Heat pump EN3 Enfield Samsung monobloc air source heat pump Set tight against the flank wall on anti-vibration feet, where it takes up none of the usable garden and the pipe run to the cylinder stays short. Read the case study Vaillant aroTHERM plus 7 kW air source heat pump in Enfield EN3 Heat pump EN3 Enfield Vaillant aroTHERM plus 7 kW air source heat pump Stood on rubber anti-vibration blocks on the existing patio slabs rather than on a new base, against the rear fence and beside the drainage the house already had. Read the case study Air source heat pump with solar and battery storage in Tottenham N15 Heat pump, solar and battery N15 Tottenham Air source heat pump with solar and battery storage The whole electrical side on one wall: inverter, battery modules and every isolator in reach, with the conduit dressed in straight runs so a fault years from now can be traced without stripping the wall. Read the case study Solar panels on ballasted frames, flat roof in Cricklewood NW2 Solar and battery NW2 Cricklewood Solar panels on ballasted frames, flat roof Low-tilt frames standing on the pebble finish of a new-build flat roof and held down by weight, so nothing is fixed through the waterproofing, with a clear strip left along the parapet to walk and work from. Read the case study Samsung monobloc air source heat pump in Camden NW1 Heat pump NW1 Camden Samsung monobloc air source heat pump Levelled on packers on an existing tiled patio rather than bolted through it, so the tiling stays intact and the unit still sits dead flat. Read the case study Samsung Gen 7 12kW high temperature heat pump in North Finchley N12 Heat pump N12 North Finchley Samsung Gen 7 12kW high temperature heat pump On wall brackets on the side of the house, clear of the ground, which keeps the side passage usable and the coil away from leaves and splashback. Read the case study Cascade pair of air source heat pumps in Barnet EN4 Heat pump EN4 Barnet Cascade pair of air source heat pumps Two machines in cascade on a flat roof, flow and return in insulated copper with isolating valves on each leg, so one can be shut down and worked on while the other keeps the building warm. Read the case study Samsung monobloc air source heat pump in Leytonstone E11 Heat pump E11 Leytonstone Samsung monobloc air source heat pump 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. Read the case study

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.

Call 020 3393 1331

Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed

Which best describes the property?

Page updated