B
BigBurner
You harp on about the need for extra servicing on unvented cylinders then recommend a product that, if faulty, can deliver CO around the whole house in a very short time. Warm air needs to be serviced on a regular basis and is generally dearer than a standard boiler to service through the need to remove components every time to check the heat exchanger integrity.
Copper coil heat exchangers can be used.
Room sealed units do not push CO around a house.
