Llanishen: plumbing, heating and air-conditioning companies
Llanishen has 2 plumbing, heating and air-conditioning companies (SIC 43220) and 0 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 CF14, summer 2026 had ≈10 nights above 18 °C there (14 times the 1991–2020 average of 0.7).
SIC 43220
Open a company
CITY ENERGY FACILITIES MANAGEMENT LIMITED, incorporated 2021, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| CITY ENERGY FACILITIES MANAGEMENT LIMITED | 2021 | Active | CF14 |
| ADVANCE ENERGY SERVICES LTD | 2016 | Liquidation | CF14 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| No SIC 43210 or 43290 company in this town | — | — | — | — |
Nearest plumbing companies within 25 km
733 plumbing companies (SIC 43220) have a registered office within 25 km. The nearest 10 are listed.
| Company | Number | District | Distance |
|---|---|---|---|
| GOGAS SOLUTIONS PLUMBING AND HEATING LTD | 12802614 | CF14 | ≈0.5 km |
| MARSHALL HEATING SOLUTIONS LTD | 12449628 | CF14 | ≈0.5 km |
| IPLUMB CARDIFF LTD | 16583676 | CF14 | ≈0.7 km |
| MWH HEATING & PLUMBING LIMITED | 08870132 | CF14 | ≈0.9 km |
| MDB HEATING & SON LIMITED | 13610136 | CF14 | ≈0.9 km |
| R THOMAS PLUMBING AND HEATING LTD | 08185897 | CF23 | ≈1.1 km |
| FREEFLOW VENTILATION LTD | 10294261 | CF14 | ≈1.1 km |
| PLÖCHL LTD | 15277276 | CF14 | ≈1.2 km |
| ELS PROVIDINGS LTD | 09072710 | CF14 | ≈1.2 km |
| AMC ELECTRICAL HEATING AND PLUMBING LTD | 08044867 | CF14 | ≈1.2 km |
Heat and planning around Llanishen
In Llanishen last summer (2026) there were ≈10 nights that stayed above 18 °C — 14 times the 1991–2020 average of 0.7 (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.
2% of sampled postcodes in Llanishen sit in a conservation area (1,661 live postcodes across 1 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.