Trying to weight up the cost/expense benefits of updating our boiler.
Current boiler: GlowWorm Space Saver MKII (1989) - 65% efficiency (when new).
Replacement: Combi - 90% efficiancy
Replacement Cost: £3800
Current annual gas usage / cost: 20,000kWh (£2,000 + £102 standing charge)
Efficiency Saving: 25%
Saving: £500 per year
On the face of it, it seems a bad deal as even at current prices, this would take us just under 8 years to make it cost effective, by which time I am assuming any new boiler will start having issues. I am also sure gas prices will come down in the next 5 years.
However we live in a hard water area so I am sure the existing boiler is full of limescale and wonder if the efficiency would be worse than 65% now that it's 33 years old? If this is the case we could be looking at a better return?
Current boiler: GlowWorm Space Saver MKII (1989) - 65% efficiency (when new).
Replacement: Combi - 90% efficiancy
Replacement Cost: £3800
Current annual gas usage / cost: 20,000kWh (£2,000 + £102 standing charge)
Efficiency Saving: 25%
Saving: £500 per year
On the face of it, it seems a bad deal as even at current prices, this would take us just under 8 years to make it cost effective, by which time I am assuming any new boiler will start having issues. I am also sure gas prices will come down in the next 5 years.
However we live in a hard water area so I am sure the existing boiler is full of limescale and wonder if the efficiency would be worse than 65% now that it's 33 years old? If this is the case we could be looking at a better return?
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