Gas
Boiler "Upgrades"
There's a good chance with energy prices constantly on the increase you might be tempted into upgrading your boiler for a more efficient model in order to save money? There is bound to be some special promotion or discount if you decide to sign up immediately. However, if saving money is your primary objective you should consider the following: -
- What is the life expectancy of your existing boiler?
- How much on average are your existing bills per year?
- How much will it cost for a boiler upgrade?
- How much more efficient will the new boiler be compared to your existing one? Thus, what savings are you likely to make per year?
- Will you need to include any additional costs that might be associated with a boiler upgrade (decorating etc)
- What is the life expectancy of the new boiler?
- Estimated percentage rise in gas prices / per year
- Could you get a grant from the government towards the cost of a replacement?
- If the money you intend to spend on the replacement was instead left in the best available savings account how much money would in make in interest?
OK, so with all the above in mind let's take a look at a few scenarios: -
SCENARIO 1
A household currently spends approximately £500 per year on their gas bills. A boiler replacement package will cost £4000.00 and is expected to last for approximately 15 years. Interest on their savings is 3%. Gas prices increase on average by 15% per year. The new boiler is expected to be 40% more efficient.
Assuming a constant level of energy consumption: -
Keep Existing Boiler
Cost of gas over 15 years = -£23,790.00
Savings of £4000.00 + interest @ 3% = £6232.00
Balance = -£17,558.00
Boiler Replacement
Cost of gas over 15 years (with a 40% increase in efficiency) = -£14,274.00
Cost of replacement boiler = -£4000.00
Balance = -£18,274.00 (Worse off with boiler replacement)
SCENARIO 2
A household currently spends approximately £1000 per year on their gas bills. A boiler replacement package will cost £4000.00 and is expected to last for approximately 15 years. Interest on their savings is 3%. Gas prices increase on average by 15% per year. The new boiler is expected to be 40% more efficient.
Assuming a constant level of energy consumption: -
Keep Existing Boiler
Cost of gas over 15 years = -£47,580.00
Savings of £4000.00 + interest @ 3% = £6,232.00
Balance = -£41,348.00
Boiler Replacement
Cost of gas over 15 years (with a 40% increase in efficiency) = -£28,548.00
Cost of replacement boiler = -£4000.00
Balance = -£32,548.00 (Better off with boiler replacement)
SCENARIO 3
A household currently spends approximately £750 per year on their gas bills. A boiler replacement package will cost £4000.00 and is expected to last for approximately 15 years. Interest on their savings is 3%. Gas prices increase on average by 10% per year. The new boiler is expected to be 40% more efficient.
Assuming a constant level of energy consumption: -
Keep Existing Boiler
Cost of gas over 15 years = -£23,829.00
Savings of £4000.00 + interest @ 3% = £6,232.00
Balance = -£17,597.00
Boiler Replacement
Cost of gas over 15 years (with a 40% increase in efficiency) = -£14,298.00
Cost of replacement boiler = -£4000.00
Balance = -£18,298.00 (Worse off with boiler replacement)
SCENARIO 4
A household currently spends approximately £1000 per year on their gas bills. A boiler replacement package will cost £4000.00 and is expected to last for approximately 15 years. Interest on their savings is 3%. Gas prices increase on average by 10% per year. The new boiler is expected to be 40% more efficient.
Assuming a constant level of energy consumption: -
Keep Existing Boiler
Cost of gas over 15 years = -£31,772.00
Savings of £4000.00 + interest @ 3% = £6,232.00
Balance = -£25,540.00
Boiler Replacement
Cost of gas over 15 years (with a 40% increase in efficiency) = -£19,063.00
Cost of replacement boiler = -£4000.00
Balance = -£23,063.00 (Better off with boiler replacement)
Thus, in conclusion it will not always be financially viable going for the upgrade. The financial viability will depend on a number of factors, but primarily how much gas you expect to use and being able to predict how much gas prices are likely to rise over the life expectancy of the new boiler.
From and environmental stand point, the more efficient replacement boiler will always win hands down, although making sure you don't have the boiler temperature set too high (much above 50°C), could ensure you save copious quantities of gas even with your existing boiler.
Remember, the greater the difference between boiler water temperature and room temperature, the greater the energy required to keep it there!
Annual Service
After your annual service has been completed check your thermostats and boiler temperature controls are set to original (pre-service) values. You might find they have been turned up to ensure you burn more gas.
Also check your water pump, if this is set too high it will potentially be making a noise all the time and will also ensure the pumps life expectancy is reduced. Guess what, these aren't going to be cheap to replace, unless of course you sign-up to a top-of-the-range service contract with top-of-the-range prices!
Double Glazing
There's no doubt that having double-glazing is more energy efficient than single glazing. However, we suggest you apply the same principles as we have above to gas and boiler replacements.
How much heat is lost to the environment through single-glazed windows compared to double-glazed windows could to a large extent depend on the mean external air temperature. If you live in a cold environment, double-glazing is going to be far more cost-effective than if you live in a place close to the equator or where the mean temperature is high.
Again, double-glazing does not last forever, so take into account the potential energy saving over the life of the product to see if you can recoup your investment. If no, then you might only be doing it for ethical reasons.