Heat Only Bolier

[enfable]

Hi all,

I am looking at getting a new boiler and was wondering if a heat only one would be a better option for me as opposed to a combi? I have a 3.99kw solar panel system and all my showers are electric. washing machine is cold water fill.

Property is detached, double glazed, has cavity wall insulation and 750mm loft insulation.

I will have about a 12 - 14 radiators (I am planning to convert my garage in the future and would like to allow for this).

I have used this website http://www.idhee.org.uk/calculator.html but can not believe that the Kw I require would be under 7Kw. Is this right?

Not sure where to post so have posted also in Home & Garden