Old Hatfield: plumbing, heating and air-conditioning companies
Old Hatfield has 1 plumbing, heating and air-conditioning companies (SIC 43220) and 3 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 AL9, summer 2026 had ≈11 nights above 18 °C there (7 times the 1991–2020 average of 1.5).
SIC 43220
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SUREFLOW (2023) LTD, incorporated 2023, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| SUREFLOW (2023) LTD | 2023 | Active | AL9 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| G & C ELECTRICAL SERVICES LIMITED | 43210 · electrical installation | 2003 | Active | AL9 |
| R NARDONE & SONS LIMITED | 43290 · other construction installation | 2009 | Active | AL9 |
| BOWDEN CONSTRUCTION GROUP LIMITED | 43290 · other construction installation | 2019 | Active - Proposal to Strike off | AL9 |
Heat and planning around Old Hatfield
In Old Hatfield last summer (2026) there were ≈11 nights that stayed above 18 °C — 7 times the 1991–2020 average of 1.5 (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.
11% of sampled postcodes in Old Hatfield sit in a conservation area (428 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.