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thermalwerk

Service area · London

Home climate engineered for Ealing homes.

Ealing covers an unusually broad range of London housing stock — elegant Chiswick townhouses, the 1930s semi-detached belt around Ealing Broadway and Northfields, Edwardian terraces in Acton, and a growing number of substantial new builds around the regenerated parts of West Ealing and Southall.

That mix is why we do well here. Heat pump retrofits work beautifully in 1930s semis where there is garden space for the outdoor unit and radiators that can be upgraded room by room. Viessmann system-boiler swaps suit the older terraced and Edwardian stock. Air conditioning makes real sense in south-facing Chiswick flats where summer afternoons push indoor temperatures into the upper twenties.

We turn up when we say we will, write clear quotes and explain our thinking. The same standards we apply in Kensington and Chelsea apply here — Ealing homeowners are no less demanding, and we would not want it otherwise.

Residential architecture in Ealing, London

Borough

London Borough of Ealing

Postcodes

W3, W4, W5, W7, W13, UB1, UB2

Population

~366,000

Typical property

1930s semi-detached

What we work on

The properties we see most

1930s three-bedroom semis with bay windows and side returns, particularly around Pitshanger, Ealing Common and Northfields. Substantial Edwardian terraces along routes like Hamilton Road and Grosvenor Avenue. Chiswick townhouses and mansion flats in W4. Post-1970s apartment buildings, some with dated communal plant rooms. A growing tail of new-build developments on infill sites across W5 and W13.

What Ealing homes ask for most

Most common: heat pumps.

Ealing is a heat pump sweet spot. 1930s semis are large enough to benefit from the running-cost economics, usually have garden space for the outdoor unit, and their original radiator sizing can often be worked with (or upgraded cheaply where needed). We install more heat pumps in W5 and W13 than almost any other postcodes. Boiler work remains steady. Air conditioning grows each summer in Chiswick and on south-facing flats.

Local considerations

What we think about before we quote.

01

Permitted development — usually straightforward

Most of Ealing's residential streets are not in conservation areas, so outdoor unit siting under MCS-020 permitted development is the norm rather than the exception. Easier quoting, faster installs.

02

Chiswick conservation areas

Parts of Chiswick (Bedford Park, Grove Park, Strand-on-the-Green) are in designated conservation areas with tighter external plant rules. We handle the siting and any planning pre-application conversation where needed.

03

Parking and van access

Mostly free on side streets away from Ealing Broadway and Chiswick High Road, with paid meters closer to town centres. Side returns on the 1930s semis make outdoor unit installs quick once we're on site.

Representative projects

The kind of work we do in Ealing.

Illustrative of typical installations in the area. Verified customer case studies with permissions are added as they become available.

W5

postcode area

Vaillant 11kW aroTHERM plus air source heat pump + cylinder swap

A typical Pitshanger 1930s semi retrofit. Heat pump sited in the side return, 300L heat-pump cylinder replacing a tired indirect one, radiator sizing reviewed and upgraded in two rooms, BUS grant of £7,500 deducted. Homeowner reports running costs notably lower than the old gas combi.

W4

postcode area

Daikin 2-zone multi-split air conditioning

A south-facing Chiswick flat with an open-plan kitchen-living space and a main bedroom. Two wall-mounted indoor units, condenser sited on the flat roof of a rear extension, full F-Gas commissioning and a Daikin Online Controller set up on the homeowner's Wi-Fi.

W13

postcode area

Viessmann Vitodens 100 combi + system flush + TRV upgrade

A West Ealing Edwardian terrace where the old combi had died mid-winter. Like-for-like swap plus a full chemical flush, new magnetic filter, and fresh TRVs on every radiator. Job done in a single working day with hot water back on by evening.

Customer stories

What homeowners tell us after the install is finished.

Placeholder reviews shown while we build a verified Google and Checkatrade profile.

Replaced our old combi with a heat pump. Quiet, much cheaper to run, and the team left the plant room tidier than they found it.
RM

Rachel M.

Dulwich · Heat pump

We had three quotes for a new Viessmann boiler. Thermalwerk was not the cheapest, but they were the only ones who actually explained the sizing.
DK

David K.

Islington · Boiler replacement

Two Daikin units fitted across an open-plan living space. Clean cable runs, properly commissioned, works brilliantly. Glad we waited for them.
PS

Priya S.

Kensington · Air conditioning

Talk to us

Thinking about a project in Ealing?

Tell us the postcode and the system you're thinking about — we'll come back the same working day with a proper plan and a realistic timeline.