I have gas central heating the main components of which are:
Baxi Bermuda PW3 Deluxe gas fire with baxi 401 back boiler
Grunfoss UPS 15-50 central heating pump
ACL lifestyle LP522 controller
Danfoss stuetermostat room thermostat
Honeywell L641A 1039 hot water thermostat
Tower MP3 22C...