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MAINSTREAM FLEET LIMITED: plumbing, heating and air-conditioning company in London
MAINSTREAM FLEET LIMITED is an active limited company (no. 03365607), incorporated in 1997, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in N18 (London), and 2,891 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
2,891 similar companies within 10 km. London
What homes around N18 need
In N18 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).
3% of sampled postcodes in N18 sit in a conservation area (on-record, 548 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 |
|---|---|---|---|
| KINECTID LTD | 13118633 | N18 | under 0.1 km |
| WARM TOUCH HEATING LIMITED | 03722128 | N18 | ≈0.3 km |
| SECURE PLUMBING SOLUTIONS LTD | 16985405 | N18 | ≈0.5 km |
| BOAT HEATING PLUMBING & AIR CONDITIONING LTD | 16677588 | E17 | ≈0.8 km |
| WACHMEISTER - PLUMBING & HEATING LTD | 10092840 | E4 | ≈0.9 km |
| GAFREY'S HEATING SPECIALISTS LIMITED | 11568594 | E4 | ≈0.9 km |
| DTECH FACILITIES LIMITED | 12821886 | E4 | ≈0.9 km |
| DTECH TECHNOLOGIES LIMITED | 15645807 | E4 | ≈0.9 km |
| CARTER WRIGHT LIMITED | 11805343 | E4 | ≈0.9 km |
| MORGAN CARTER LIMITED | 11825819 | E4 | ≈0.9 km |
Company record
| Field | Value |
|---|---|
| Company number | 03365607 |
| Name | MAINSTREAM FLEET LIMITED |
| Status | Active |
| Incorporated | 6 May 1997 |
| SIC | 43220 · plumbing, heat and air-conditioning installation; 45200 |
| Registered office postcode | N18 3QT |
| Outcode | N18 |
| 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 03365607 |
Companies House record: MAINSTREAM FLEET LIMITED, company 03365607, 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.