Hi this is really a question for a heating engineer unless someone out there has had the same situation. I have brought a house and it is fitted with Johnson and starley warm air heating. It works fine but as I have always had gas central heating I'm looking to rip it out and replace it. I have been told both good and bad about warm air, one being it costs a fortune in gas? Can anyone help in the decision in keeping it or updating to GCH?
Warm air was never very popular it was mainly used in flats, warm air is a very dry heat and no good if you suffer from breathing problems as the air circulates - so does the dust.
Regular maintenance is essential, as not only is it an open flued appliance (takes combustion air from the internal space) on a wet system if the heat-ex cracks you have a leak - immediately noticeable. If a warm air unit heat-ex splits the combustion gases mix with the warm air and the products of combustion can come through the vents in all rooms - extremely dangerous.
If you consider a combi against the warm air unit - the warm air unit is just for heating. You need a water heater such as the Janus (alongside the warm air unit) for the hot water. So a heating/hot water boiler will use less gas than a warm air unit and water heater.
Thanks for that htg, I was looking to go down the GCH route as it is more modern and looks better. I know you can't be exact, and I won't hold you to it but what am I looking at for a complete install, remembering that I have nothing installed at present due to it being warm air. I have a 3 bed house, 1 front room ( about 20 ft) a kitchen, down stairs toilet, small down stairs hallway with stairs leading upstairs to small hallway, 3 rooms and a bathroom. Just a roundabout figure so I know what I looking to save up, cheers
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