Gas boiler
If you are thinking about upgrading or installing a central heating boiler you have to consider some characteristics.
1. First of all you have to decide on the type of fuel you want your boiler to use.
2. Evaluate the size of the household and calculate the size of the boiler you will need. Consider the number of rooms and bathrooms you have together with the people living inside the house.
3. Choose from the three central boiler heater available: a combination, conventional or a system boiler. Most households use conventional units to heat the house and the water. This unit requires a holding tank and is the largest consumer of energy from the 3.
The combination unit works without a holding tank and extra pipe work and also provides hot water on demand. Even though they are cheaper than conventional units this one takes longer to heat up the water and also allows only one tap at a time.
Being also the most expensive, system boilers have the advantage of providing more consistent temperatures and flow rates because of the heating element located inside the storage tank.