ESI Mechanical Room Thermostat | Single-Zone Heating Control
by ESI
Original price
£12.90
-
Original price
£12.90
Original price
£12.90
£12.90
-
£12.90
Current price
£12.90
ESI Mechanical Room Thermostat — ESRTM
Simple, reliable on/off temperature control for single-zone central heating systems. The bimetallic strip mechanism requires no power to operate — it directly switches the boiler or zone valve circuit at the set temperature. The preferred choice where proven reliability matters more than programmability, and ideal for rental properties where tenant-proof simplicity is essential.
Key Features
- Voltage-free switched output — compatible with most UK boiler wiring centres
- 10–30°C temperature range
- No batteries required — bimetallic strip operation
- Flush wall plate fitting — neat, compact installation
- Compliant with Part L Building Regulations when used with TRVs on all other radiators
- Suitable for rental properties and straightforward single-zone installations
Technical Specification
| Model | ESRTM |
| Control Type | Mechanical (bimetallic strip) |
| Output | Voltage-free switched |
| Temperature Range | 10–30°C |
| Power Required | None (no batteries) |
| Mounting | Flush wall plate |
| Compliance | Part L Building Regulations |
| Application | Single-zone central heating |
🚚 Next-day delivery on orders placed before 3pm Mon–Fri
📍 Same-day click & collect — 24 Western Avenue, Acton W3 7TZ (Mon–Fri 7:30am–5:30pm · Sat 8am–1pm)
🚚 Free delivery on orders over £50
📍 Same-day click & collect — 24 Western Avenue, Acton W3 7TZ (Mon–Fri 7:30am–5:30pm · Sat 8am–1pm)
🚚 Free delivery on orders over £50