heat only boiler sizing

[kingccc]

hello
we are looking at getting a new central heating system and want a second oppinion on boiler size we want a heat only boiler and our house has or will have 13 rads and looking at maybe a baxi solo or unless you could reccomend better
what are your reccomendations please

 

[Agile]

You need to calculate the whole house heat loss. D Hailsham will give you the links soon.

As a guide a three bed semi needs about 10-12 kW.

You only need to allow 2 kW for water heating.

Tony

 

[kingccc]

ok thankyou, it is a 4 big bedroomed house im not after exact figure at this stage just roughly what boiler and size is likely to go in to give us a rough price

 

[JohnD]

looking at it from a different perspective:

what is the output of your current boiler?

Does it keep the house warm enough?

On a cold night, is it running continually or does it cycle on and off?

If you run a bath on a cold night, do you notice the house getting colder for half an hour or so?

 

[Agile]

The heat requirement will vary greatly depending on loft instlation, double glass windows, solid or cavity walls or insulated cavity walls.

Typically 10-30 kW as there are so many variables.

I dont see that can be of any help. What do you want to achieve?

Tony

 

[kingccc]

ok i see your point i will do the calculation to get exact requirement, i was just pricing up to get a ball park figure but may as well get exact figure
thanks agile