Caerdydd: plumbing, heating and air-conditioning companies
Caerdydd has 3 plumbing, heating and air-conditioning companies (SIC 43220) and 7 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 CF3, summer 2026 had ≈12 nights above 18 °C there (12 times the 1991–2020 average of 1.0).
SIC 43220
Open a company
CF3 PLUMBING & HEATING LTD, incorporated 2026, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| CF3 PLUMBING & HEATING LTD | 2026 | Active | CF3 |
| COOK’S HEATING AND COOLING LTD | 2023 | Active | CF3 |
| TRI 3 LTD | 2023 | Active - Proposal to Strike off | CF3 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| R2 HEATING ENERGY LTD | 43290 · other construction installation | 2025 | Active | CF14 |
| MR GAS HEATING AND PLUMBING LTD | 43290 · other construction installation | 2025 | Active | CF14 |
| WEG SOLAR LTD | 43290 · other construction installation | 2024 | Active | CF5 |
| AJ FIRE LTD | 43290 · other construction installation | 2025 | Active | CF3 |
| BECKINSALE-UK LTD | 43290 · other construction installation | 2025 | Active | CF3 |
| JCSTRUCTURES LTD | 43290 · other construction installation; 71129 | 2026 | Active | CF15 |
| PANDA SOLAR LTD | 43290 · other construction installation | 2026 | Active | CF15 |
Heat and planning around Caerdydd
In Caerdydd last summer (2026) there were ≈10.4 nights that stayed above 18 °C — 13 times the 1991–2020 average of 0.8 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities). The figure is the household-weighted mean of 4 postcode districts where these offices are registered.
4% of sampled postcodes in Caerdydd sit in a conservation area (4,538 live postcodes across 4 districts).
In Wales 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.