I need to replace my duff oil boiler but having read a load of stuff, I am not convinced that a condensing unit is the way to go.
Convince me by all means, but:
- I'm not bothered by the legislation - I can work round that - I just want the most cost effective solution.
- I will be installing a 180 ltr thermal store/heat store WITH SOLAR INPUT and an Alpha pump.
- Big house, well insulated, 23 rads, but only 2 occupants, one bathroom, 1 bath of dhw used each morning.
My assumptions are:
- Solar input will mean the boiler won't run in condensing mode (if at all) during summer burns (insufficient temp diff)
- Ditto for spring & autumn 50% of time
- Boiler will hit max effeciency with full condensing ONLY in cold winter months when CH is on and there's no solar contribution.
So, I am paying £400 more for a boiler that only runs in condensing mode for 3 months a year??!! And it will be less reliable than a standard boiler? Makes the payback period closer to 20 years than 10. Not cost effective!
PLEASE feel free to correct any incorrect assumptions or add anything I have not considered. Thanks.
Convince me by all means, but:
- I'm not bothered by the legislation - I can work round that - I just want the most cost effective solution.
- I will be installing a 180 ltr thermal store/heat store WITH SOLAR INPUT and an Alpha pump.
- Big house, well insulated, 23 rads, but only 2 occupants, one bathroom, 1 bath of dhw used each morning.
My assumptions are:
- Solar input will mean the boiler won't run in condensing mode (if at all) during summer burns (insufficient temp diff)
- Ditto for spring & autumn 50% of time
- Boiler will hit max effeciency with full condensing ONLY in cold winter months when CH is on and there's no solar contribution.
So, I am paying £400 more for a boiler that only runs in condensing mode for 3 months a year??!! And it will be less reliable than a standard boiler? Makes the payback period closer to 20 years than 10. Not cost effective!
PLEASE feel free to correct any incorrect assumptions or add anything I have not considered. Thanks.