inceasing the size of my heating system

sloth

hi,

i have a question forany experienced plumbers that i hope can be answered

i have an ikon 28t combi boiler whch i have had for around 4 years now. i live in a two bedroom bungalow which has around 4 newish (4 yrs old) radiators, 4 older (but still nice and hot) older radiators and 1 towel radiator. we are looking to to do a loft extension now to add two bedrooms and another bathroom so potentially 3 more radiators and an extra towel radiator. i still have the instruction/technical booklet for the boiler so am hoping someone can advise me what details i need to know to work out whether the current boiler will comfortably be able to cope with the increased load

thanks for any help

sloth

plumb1_2

You need to look in the booklet and find out the heating output ether in BTW or KW.
Measure your excisting rads and calculate their output, then you will have whats spare.

sloth

plumb1 wrote: »

You need to look in the booklet and find out the heating output ether in BTW or KW.
Measure your excisting rads and calculate their output, then you will have whats spare.

thanks for your reply. what you mind telling me how to calculate the existing radiator's output

thanks again

HugoSP

Sloth

Have a look at this:

Measure your rads and match the sizes to the cheap panel ones here.

http://www.screwfix.com/search.do;jsessionid=Q4RKXHA5DPOD2CSTHZPCFEY?_dyncharset=UTF-8&fh_search=radiator

Remember that you get both single and double.

What type of CH system have you got? If it is a combi system then you'll be fine. If you have a conventional system with a header tank, this header tank will need to be about a metre higher than the higest rad in the system. You will almost certainly need to raise this up to the ridge of the roof if you go with the loft conversion.

When we looked at a loft conversion in a previous house we came up with the idea of using storage heaters or electric panel heaters in the loft, mainly beacause our boiler was old.

The other option you have is underfloor heating.

sloth

thanks Hugo for your post

we have a combi boiler so therefore no tank in the loft which is handy!! although also no airing cupboard which is a shame as i like nice warm clothes in the morning!! haha

wil measure my radiators tonight/tomorrow and check against screwfix. thanks (should have thought of that myself)

re the underfloor heating, i am quite keen on that idea but surely that runs off the boiler anyway so why would it be better than extra radiators? uses less btu?

thanks again

Canucklehead

Good morning: Your boiler has a flow rate of 11.5 liters/minute, output for heating 28 kw. Conclusions....no problem with the heating side but DHW would be an issue i.e. your boiler will have sufficient hot water supply for only one bathroom/shower room.

HTH

Canucklehead

sloth

thanks for the response

i understand what you are saying, but i assume i am right in saying that even though i would have a total of one seperate showerroom and one bath/showever in the house, as long as they are not both in use at the same time it shouldn't be a problem? is that correct?

thanks

Canucklehead

sloth wrote: »

thanks for the response

i understand what you are saying, but i assume i am right in saying that even though i would have a total of one seperate showerroom and one bath/showever in the house, as long as they are not both in use at the same time it shouldn't be a problem? is that correct?

thanks

Good afternoon:
Yes...just advise any guests about the situtation, otherwise:eek: Also any other hot water outlet e.g. basins, kitchen sink will impact on DHW supply to the shower/bath in question as it does now.

HTH

Canucklehead

sloth

Canucklehead wrote: »

Good afternoon:
Yes...just advise any guests about the situtation, otherwise:eek: Also any other hot water outlet e.g. basins, kitchen sink will impact on DHW supply to the shower/bath in question as it does now.

HTH

Canucklehead

thanks canucklehead for your help. sorry to do this but as you have been so helpful and seem to know what you are talking about would you be able to help me with my other query

http://forums.moneysavingexpert.com/showthread.html?t=708777

thanks again