Calls for back-up heating from boiler when solar power is not available. Prevents collector and store from over heating and monitors the complete solar thermal installation. Suitable for typical UK solar thermal systems. Specifications: Output 2 relays (max 4A) power supply 230V AC 50Hz.

A replacement for most common motorised valves. Approved to EN 60730. Specifications: 230V. 50Hz. 4.5W.

3 wire installation. Override facility. Holiday mode. Boost control. EN 60730. Specifications: Switching/contact rating: 2(1)A 230VAC. Maximum load: 0.5kW. H x W x D: 97 x 150 x 34mm.

3 wire installation. Override facility. Holiday mode. Boost control. EN 60730. Specifications: Switching/contact rating: 2(1)A 230V AC. Maximum load: 0.5kW. H x W x D: 97 x 150 x 34mm.

Separate timing. 4-wire installation. Override facility. Holiday mode. Boost function. EN 60730. 24 Hour or 5 / 2 Day programmable. Specifications: Switching/contact rating: 2(1)A 230V AC Each switch. H x W x D: 99 x 153 x 36mm. Backplate fit: British Gas Standard. 24 hour or 5/2 day programmable. Suitable for underfloor heating.

Offers frost protection. Positive shut off. Approved to EN 215. Specifications: Temperature range: 10 - 27°C.

Offers frost protection. Positive shut off. Approved to EN 215. Specifications: Temperature range: 10-27°C.

Offers frost protection. Positive shut off. Approved to EN 215. Lockshield approved to BS 2767-10. Specifications: Temperature range: 10 - 27°C.