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Vaillant ecoTEC PLUS 837
Vaillant ECOmax 635 (2004-2008)
✔ Direct replacement – no modification required
Name:VAIL 0020254034 SERVICE VALVE
ECOTEC PLUS 630 VU 306/5-5 A R4
Honeywell Home T4R Wireless Programmable Thermostat Kit Y4H910RF4003 0020010842 Vaillant ecoTEC PLUS 837Honeywell HomeT4 is designed to provide automatic time and temperature control of domestic systems. It is compatible with 24 V to 230 V on or off appliances such as gas boilers, combi boilers and zone valves and can be used as a temperature sensing device in an S or Y Plan system. It is well suited to control combination boiler installations or additional zones in an S Plan Plus system. Compatible with 24 V to 230 V on or off appliances such as gas
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