Old Harlow: plumbing, heating and air-conditioning companies
Old Harlow has 4 plumbing, heating and air-conditioning companies (SIC 43220) and 8 electrical and other installation companies registered here (Companies House, 1 Sep 2026); 0 are MCS-certified for air-to-air yet. If the office is in CM17, summer 2026 had ≈11 nights above 18 °C there (6 times the 1991–2020 average of 1.9).
SIC 43220
Open a company
AJC PLUMBING AND HEATING SERVICES LIMITED, incorporated 2003, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| AJC PLUMBING AND HEATING SERVICES LIMITED | 2003 | Active | CM17 |
| FIVE OAX BATHROOM,PLUMBING & HEATING LIMITED | 2006 | Active | CM17 |
| PREMIER DRAINAGE COMPANY LTD. | 2012 | Active | CM17 |
| SAM'S HEATING & PLUMBING LIMITED | 2011 | Active | CM17 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| CLARITY IN SOUND LIGHT AND VISION LIMITED | 43210 · electrical installation | 2001 | Active | CM17 |
| L & R CONTRACTS LIMITED | 43210 · electrical installation | 2003 | Active | CM17 |
| M M INTERIORS LIMITED | 43290 · other construction installation | 2003 | Active | CM17 |
| NETCOM SERVICES LTD | 43210 · electrical installation | 2025 | Active | CM17 |
| OCTAGON ELECTRICAL CONTRACTS LTD | 43210 · electrical installation | 2025 | Active | CM17 |
| SELECT FIRE SERVICES LIMITED | 43210 · electrical installation | 1995 | Active | CM17 |
| SSE COMMERCIAL LIMITED | 43210 · electrical installation | 2002 | Active | CM17 |
| T M R CONTRACTS LIMITED | 43290 · other construction installation | 2003 | Active | CM17 |
Heat and planning around Old Harlow
In Old Harlow last summer (2026) there were ≈11 nights that stayed above 18 °C — 6 times the 1991–2020 average of 1.9 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities). The figure is the household-weighted mean of 1 postcode districts where these offices are registered.
12% of sampled postcodes in Old Harlow sit in a conservation area (529 live postcodes across 1 districts).
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).
Companies House snapshot 1 Sep 2026, 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. Hot nights: ERA5-ARCO, June–August, minimum at or above 18 °C, household-weighted across the districts where these offices are registered, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points, snapshot 25 Sep 2026. Distances are an equirectangular approximation to 0.1 km.
Better than a town directory that only lists names: each plumbing company links to its Companies House record and the local hot-night count.