Ruthin: plumbing, heating and air-conditioning companies
Ruthin has 5 plumbing, heating and air-conditioning companies (SIC 43220) and 6 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 LL15, summer 2026 had ≈1 nights above 18 °C there (8 times the 1991–2020 average of 0.1).
SIC 43220
Open a company
CASTLE PLUMBING AND BATHROOMS LTD, incorporated 2024, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| DI JONES HEATING ENGINEERS LIMITED | 2013 | Active | LL15 |
| CASTLE PLUMBING AND BATHROOMS LTD | 2024 | Active | LL15 |
| MNC DEVELOPMENTS LTD | 2025 | Active | LL15 |
| LP PLUMBING HEATING LTD | 2026 | Active | LL15 |
| MJR GAS LTD | 2020 | Active | LL15 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| A L WILLIAMS ELECTRICAL LTD | 43210 · electrical installation | 2017 | Active | LL15 |
| DUFFIELDS TECHNICAL SERVICES LTD | 43210 · electrical installation; 33200; 71129 | 2020 | Active | LL15 |
| DYFED JONES ELECTRICAL LTD | 43210 · electrical installation | 2015 | Active | LL15 |
| JDOUTDOORS LTD | 43290 · other construction installation | 2025 | Active | LL15 |
| SOLAR NOW LIMITED | 43290 · other construction installation | 2021 | Active | LL15 |
| ROB DENNIS ELECTRICAL LTD | 43210 · electrical installation | 2023 | Active - Proposal to Strike off | LL15 |
Heat and planning around Ruthin
In Ruthin last summer (2026) there were ≈1 nights that stayed above 18 °C — 8 times the 1991–2020 average of 0.1 (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.
15% of sampled postcodes in Ruthin sit in a conservation area (456 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.