Been advised by 2 different installers.. one said, get a worsester green star 18RI.. the other suggested getting a much bigger one because I have 13 rads. Is this true? I dont want to spend money and have high emissions when I dont need to. Help!! 
Advice pls
- Thread starter kateest
- Start date
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You need to find out the heat output of each rad, add them up then add 3Kw for the HW cylinder. This will give you the size of boiler you require.
Number of radiators is immaterial, just the outputs that count.
Number of radiators is immaterial, just the outputs that count.
Many factors, how well is your hose insulated? How good are your windows? How warm do you like it? Will you be heating bath water on demand, or will you have a hot water tank?
If you heat hot water on demand, you need to have around 27Kw minimum to get a decent flow of water for a bath or shower.....
Just having a larger boiler will not increase your fuel bills in itself, but having one too small will cut your bills as you never get the comfort or burn the has/oil to get it how you want it!
Heating hot water on demand saves money too....storing hot water always costs more.....
A house should be properly insulated, windows should be good and sealing well, if you haven't got that, you are going to increase the fuel bills!!
Remember to get a set temperature in the house, takes a set amount of fuel. A big boiler can burn it quicker and achieve the temperatures quicker......a smaller boiler simply takes longer. The carbon footprint is almost identical.
The larger boiler has more in reserve and will probably last longer because you can run it at a lower temperature!!! I do just that!!!
If you heat hot water on demand, you need to have around 27Kw minimum to get a decent flow of water for a bath or shower.....
Just having a larger boiler will not increase your fuel bills in itself, but having one too small will cut your bills as you never get the comfort or burn the has/oil to get it how you want it!
Heating hot water on demand saves money too....storing hot water always costs more.....
A house should be properly insulated, windows should be good and sealing well, if you haven't got that, you are going to increase the fuel bills!!
Remember to get a set temperature in the house, takes a set amount of fuel. A big boiler can burn it quicker and achieve the temperatures quicker......a smaller boiler simply takes longer. The carbon footprint is almost identical.
The larger boiler has more in reserve and will probably last longer because you can run it at a lower temperature!!! I do just that!!!
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