Will Boiler Handle 3 New Radiators

Thehooker

Hi all, any info would be appreciated, I'm planning a loft conversion which will have 1 bedroom, shower room/toilet and small study/store, will my current combi boiler cope with 3 new radiators?

The boiler is a Worcester 28Si II and currently works fine for my 2 bed semi bungalow, heats the water and runs 6 radiators at the moment with no problems.

I have the manual, but couldn't make anything of the information in it.

Thanks

bockster

my personal opinion would be yes. i have a 37kw combi but the max for heating is 28kw and that is running 11 rads.
obviously depends on the size of rads. and whether your max kw is still 28 for heating? refer to manual. (i think.. larger kw combi,s are, to a point, just larger kw on the hot water side).

i guess the corect way to go about this is to convert 28kw to btu's then add up the sum total of rads you want to heat and make sure the rad btu,s is lower. (some guesstimation may be req,d with existing rads).

all off the top of my head.
hth

EliteHeat

Yes, easily. If your builder tells you differently then never believe another word he says.

*j*

Give it a go. What do you have to lose?

The new loft conversion will presumably be very well insulated and require very little heating to bring it up to temperature.

*j*

ormus

as above. its very unlikely that your boiler cannot manage 9 average rads.

andrew-b

2 bed semi bungalow here..10 rads (variety of sizes) 18kW non-combi boiler and no problem.

Thehooker

Thanks to everyone for the posts, puts my mind at rest and ticks one more job off the list.

Canucklehead

Thehooker wrote: »

Hi all, any info would be appreciated, I'm planning a loft conversion which will have 1 bedroom, shower room/toilet and small study/store, will my current combi boiler cope with 3 new radiators?

The boiler is a Worcester 28Si II and currently works fine for my 2 bed semi bungalow, heats the water and runs 6 radiators at the moment with no problems.

I have the manual, but couldn't make anything of the information in it.

Thanks

Good evening: additional rads wouldn't be a problem but your boiler couldn't cope with another bath/shower room... the 28Si II has a low DHW flow rate and would struggle with simultaneous drawoffs...or perhaps the new shower room has an electric shower?

HTH

Canucklehead

Thehooker

Cheers Canucklehead, I was just planning an electric shower.

debbie42

We have a 28 something Worcester Bosch combi in a 4 bed detached. Only one mains shower, one electric. It works fine.