I have an Enviromax Combi C made by Firebird which is an oil fired system. It has no thermostatic controls on it and the programmer is the only way of switching the hot water on or off and likewise with the heating. It's a condensing boiler with no separate hot water tank. Does this make sense...
Hi
Looking for some advice....I have just purchased a Nest 3rd Gen and are looking to install myself. I have a Honeywell ST9400C programmer for heating and hot water positioned next to my oil fired Firebird Combi boiler. I also have a Honeywell room stat.
I have photographed the existing...