Home / Installers / London
THERM-FIX LTD: plumbing, heating and air-conditioning company in London
THERM-FIX LTD is an active limited company (no. 12906725), incorporated in 2020, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in N1 (London), and 3,763 similar companies have a registered office within 10 km. If you need an MCS-certified air-to-air installer, MCS lists 0 installers certified for air-to-air heat pumps yet (checked 25 Sep 2026), so no company here can offer the £2,500 grant route today.
Active
Within 10 km
3,763 similar companies within 10 km. London
What homes around N1 need
In N1 last summer (2026) there were ≈10 nights that stayed above 18 °C — 5 times the 1991–2020 average of 1.9 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
56% of sampled postcodes in N1 sit in a conservation area (on-record, 2,282 live postcodes).
In England an air-source heat pump on a house can be permitted development under Class G when the conditions hold, including the MCS 020a noise limit of 37.0 dB(A) (§3.2 Step 8).
Hot nights: ERA5-ARCO, June–August, minimum at or above 18 °C, 2026 against the 1991–2020 mean, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points, snapshot 25 Sep 2026. Noise limit from the decision contract, checked 25 Sep 2026.
Nearest similar companies
| Company | Number | District | Distance |
|---|---|---|---|
| WATERCRAFTS PLUMBING LIMITED | 11835930 | N1 | ≈0.1 km |
| THORNE & THORNE LIMITED | 11889601 | N1 | ≈0.1 km |
| COMMERCIAL GAS SAFETY CERTIFICATES LTD | 10782861 | EC1V | ≈0.2 km |
| FIXNOW PLUMBING & ELECTRIC LIMITED | 16953534 | EC1V | ≈0.2 km |
| QUANTECH ENVIRONMENTAL LTD. | 02412825 | EC1V | ≈0.3 km |
| SPEEDHEAT LIMITED | 04596132 | EC1V | ≈0.3 km |
| APEX PLUMBING & BUILDING SERVICES LTD | 06499618 | EC1V | ≈0.3 km |
| COONEY AND COMPANY UK LIMITED | 06903608 | EC1V | ≈0.3 km |
| DRAINAGE MAINTENANCE LIMITED | 07105240 | EC1V | ≈0.3 km |
| HAMILTON HVAC LTD | 07405977 | EC1V | ≈0.3 km |
Company record
| Field | Value |
|---|---|
| Company number | 12906725 |
| Name | THERM-FIX LTD |
| Status | Active |
| Incorporated | 25 Sep 2020 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | N1 7NW |
| Outcode | N1 |
| Nation | England |
| Air-to-air signal | not yet observed, checked 25 Sep 2026 |
| F-Gas | not yet observed, checked 25 Sep 2026 |
| MCS air-to-air | not yet observed, checked 25 Sep 2026 |
| Retrieved | 25 Sep 2026 |
| Dataset | https://download.companieshouse.gov.uk/BasicCompanyDataAsOneFile-2026-09-01.zip |
| Companies House page | Company 12906725 |
Companies House record: THERM-FIX LTD, company 12906725, status Active, retrieved 25 Sep 2026. The address shown is the registered office, not a verified operating base. This catalogue is a directory of incorporated businesses, not an exhaustive installer register. Snapshot 1 Sep 2026, retrieved 25 Sep 2026. The 10 km count is equirectangular to 0.1 km. MCS air-to-air confirmed in this catalogue: 0, checked 25 Sep 2026.
Better than a reviews catalogue: the Companies House record, the district hot-night count and the MCS air-to-air observation are on one page.