26 or 30 kW boiler?

Ellie77

Thanks for all your replies. I guess then it's a case of paying a bit extra to heat the water and fill the bath quicker. I am however bearing in mind that 26 kW is more than I have currently and the technology has obviously come on in leaps and bounds (my boiler is c.20 years old and has not been serviced in years ) so I'm hopefully going to notice a significant improvement either way.

daveyjp

It should be matched to your cold water flow rate. If your rate is adequate for a 30kw choose that one.

southcoastrgi

Just to add to your thought process, personally I would look at a different boiler make, you can get a better boiler for the same money

jk0

Yeah, I'd go with the bigger boiler. My only concern is will the gas pipe be adequate?

sk240

I would do a flow rate test (fill a bucket for 30 secs-1 min and see how many liters per min is delivered (test at at least two locations as the tap may restrict the flow)
then size the boiler to match.


I went for a 32Kw as i too was thinking bigger was better, but i could have saved myself £3-400 as a 24kw would have heated the water, as the 32kw one doesn't even get to 50% output!

GDB2222

southcoastrgi wrote: »

Just to add to your thought process, personally I would look at a different boiler make, you can get a better boiler for the same money

What do you have in mind?

I've been very impressed with WB after sales service. Having said that, I've heard lots of good things about Intergas.

Interestingly, Which scores WB very highly and Intergas only in the middle.

Ant555

Ellie77 wrote: »

Thanks for all your replies. I guess then it's a case of paying a bit extra to heat the water and fill the bath quicker. I am however bearing in mind that 26 kW is more than I have currently and the technology has obviously come on in leaps and bounds (my boiler is c.20 years old and has not been serviced in years ) so I'm hopefully going to notice a significant improvement either way.

Ref:Noticing difference.

I replaced a 20 year old 24cdi around 2 years ago - spent around £250 on parts on the 24cdi in 20 years an never had it serviced so it served us well.
I went for a WB Greenstar 30i and am happy with the results. I am planning a shower off the hot water system replacing an electric one so that was our main consideration.

Part of the install was a power flush of the system and I dont know if its the flush or the new boiler but I immediately could tell the house seemed warmer (placebo effect or real, I dont know!)
I can feel heat 'radiating' from the radiators where I definitely could not before - again, not sure if due to better boiler or due to the flush.

Hope this helps.

GDB2222

Ant555 wrote: »

Ref:Noticing difference.

I replaced a 20 year old 24cdi around 2 years ago - spent around £250 on parts on the 24cdi in 20 years an never had it serviced so it served us well.
I went for a WB Greenstar 30i and am happy with the results. I am planning a shower off the hot water system replacing an electric one so that was our main consideration.

Part of the install was a power flush of the system and I dont know if its the flush or the new boiler but I immediately could tell the house seemed warmer (placebo effect or real, I dont know!)
I can feel heat 'radiating' from the radiators where I definitely could not before - again, not sure if due to better boiler or due to the flush.

Hope this helps.

Unless your place is simply massive, 24kW is plenty of heat. So, any improvement is down to the power flush. Or, just possibly, due to draining down and refilling carefully to avoid some air locks.

FWIW, for only a few £££s extra, I'd go for the bigger boiler, as it should give a better shower.

southcoastrgi

Intergas is head & shoulders above WB, which isn't always right

southcoastrgi

GDB2222 wrote: »

Unless your place is simply massive, 24kW is plenty of heat.

24kw is the smallest combi you can buy, i personally wouldn't fit one as the flow rate isn't really good enough