Looking to size the right boiler for our house. A combination of different roof/wall materials throughout the building though makes it tricky to provide accurate data for the various on-line boiler size calcs. I'm getting answers anywhere from 15kW up to 30kW.
Our current boiler is inadequate to heat the house in the depths of winter and is rated at 18kW. However, I know it is badly compromised by a partially blocked heat exchanger so I doubt it is getting close to that figure.
I'd like to go for a viessmann compact 100 in either 19kW or 26kW format. Given that both of these modulate down to the same 7.9kW figure, can I install the 26kW model without worrying about the output being too high for our house (and thus causing the boiler to run inefficiently)?
Cheers,
iep
Our current boiler is inadequate to heat the house in the depths of winter and is rated at 18kW. However, I know it is badly compromised by a partially blocked heat exchanger so I doubt it is getting close to that figure.
I'd like to go for a viessmann compact 100 in either 19kW or 26kW format. Given that both of these modulate down to the same 7.9kW figure, can I install the 26kW model without worrying about the output being too high for our house (and thus causing the boiler to run inefficiently)?
Cheers,
iep