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DJML HEATING LIMITED: plumbing, heating and air-conditioning company in Watford
DJML HEATING LIMITED is an active limited company (no. 10388230), incorporated in 2016, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in WD18 (Watford), and 781 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
781 similar companies within 10 km. Watford
What homes around WD18 need
In WD18 last summer (2026) there were ≈10 nights that stayed above 18 °C — 8 times the 1991–2020 average of 1.3 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
6% of sampled postcodes in WD18 sit in a conservation area (on-record, 712 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 |
|---|---|---|---|
| HULME PROJECT MANAGEMENT LIMITED | 06921705 | WD18 | under 0.1 km |
| GAS TECH HEATING LIMITED | 09982905 | WD18 | under 0.1 km |
| EXCEL MAINTENANCE SERVICES LTD | 10008572 | WD18 | under 0.1 km |
| TOWER GAS LTD | 10051981 | WD18 | under 0.1 km |
| GN HEATING LTD | 10598869 | WD18 | under 0.1 km |
| A.R.BEVERIDGE & SONS LTD | 11232979 | WD18 | under 0.1 km |
| ABC REFRIGERATION LTD | 12334172 | WD18 | under 0.1 km |
| BAKER PLUMBING AND HEATING LTD | 13421411 | WD18 | under 0.1 km |
| ATHERSTONE AIR CONDITIONING LIMITED | 17424199 | WD18 | under 0.1 km |
| WATERFORD DEVELOPMENT LIMITED | 05929002 | WD18 | ≈0.2 km |
Company record
| Field | Value |
|---|---|
| Company number | 10388230 |
| Name | DJML HEATING LIMITED |
| Status | Active |
| Incorporated | 21 Sep 2016 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | WD18 9SB |
| Outcode | WD18 |
| 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 10388230 |
Companies House record: DJML HEATING LIMITED, company 10388230, 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.