Advice on costs of converting conventional boiler to combi

keith969

Pressurised unvented system every time. Lots of hot water from multiple showers/taps simultaneously, and backup with an immersion heater. And you can put the HW cylinder anywhere (mines in the garage).

patel1977

keith969 wrote: »

Pressurised unvented system every time. Lots of hot water from multiple showers/taps simultaneously, and backup with an immersion heater. And you can put the HW cylinder anywhere (mines in the garage).

Thanks for your quick reply.

Which make & model you recommend? How many liters cylinder will I need,

neilmcl

patel1977 wrote: »

Thanks for your quick reply.

Which make & model you recommend? How many liters cylinder will I need,

Might be worth starting your own thread for this.

fezster

rayudu wrote: »

2) Right now we have 1 bathroom, combi boiler would be good option. In case if we add another bedroom and bathroom. I will consider having electric shower in the new bathroom.

If i go down the 2nd option, right now we have 7 radiators and 1 bathroom what is the minimum capacity (21,24,28, etc) boiler we can consider?

With one bathroom, a combi may well serve your needs just fine. An unvented is more suited to a house with multiple hot outlets being used simultaneously. It is more expensive to buy, requires annual maintenance of it's safety features, and requires an adequate flow rate and working pressure on your water main to get the intended usage from it. Plus you need somewhere to put the cylinder - space you could gain if you had a combi installed.

fezster

patel1977 wrote: »

I have a system boiler which is 10 years old. Planning to have the kitchen done and move the boiler in the airing cupboard.

We have 4 bedroom house, 11 radiators, 1 bathroom & 1 electric shower downstairs.

Can anyone suggest should I go for a combi or stick with the same one.

I'm based in Leicester.

When asking for quotes, what points should I ask.

Thanks

What is "the same one"? Do you have a cylinder at the moment? Is it vented or unvented?

With one bathroom and one electric shower - again, as per OP and my previous post, you may not get any real benefit from an unvented, as the electric shower will not utilise the hot water.

patel1977

Vented
Cylinder yes

Combi recommendation please?

Will I require to do radiator cleaning and the other bits etc?

no1catman

rayudu wrote: »

2) Right now we have 1 bathroom, combi boiler would be good option. In case if we add another bedroom and bathroom. I will consider having electric shower in the new bathroom.

If i go down the 2nd option, right now we have 7 radiators and 1 bathroom what is the minimum capacity (21,24,28, etc) boiler we can consider?

Live in a traditional thirties semi - have eight rads., + bathroom towel rail (with many rungs), had an Ideal 24 fitted nearly two years ago with radio wall controller. It's much quieter than the previous Ferroli - which no engineer liked.

Personally, I'd go with a new one, with the quotes you've got - check for facebook pages, and yell.com see what reviews/comments you can find.

thorganby

no1catman wrote: »

Live in a traditional thirties semi - have eight rads., + bathroom towel rail (with many rungs), had an Ideal 24 fitted nearly two years ago with radio wall controller. It's much quieter than the previous Ferroli - which no engineer liked.

Personally, I'd go with a new one, with the quotes you've got - check for facebook pages, and yell.com see what reviews/comments you can find.

This is Money Saving Expert and it is never good advice to replace an solid old boiler with a new one costing £3K if it can be easily repaired at a reasonable cost.

The fact that you chose to have one second rate boiler replaced with another second rate boiler is not a good recommendation for the OP!

This site https://www.sortedgas.co.uk/boilers explains which boilers should be avoided and which boilers are far superior ones to choose from.

Any make of boiler will work when first installed but for how long?

robatwork

rayudu wrote: »

Does it fit for 40L model?

Your thread has been derailed a bit but to get back to you. The Suprima range is 30 - 100 L see this

https://www.potterton.co.uk/literature-library#PottertonSuprima|Literature2

I am not 100% sure but fairly confident it's the identical PCB for all those models. Check with the guy selling before you buy though.

no1catman

thorganby wrote: »

This is Money Saving Expert and it is never good advice to replace an solid old boiler with a new one costing £3K if it can be easily repaired at a reasonable cost.
The fact that you chose to have one second rate boiler replaced with another second rate boiler is not a good recommendation for the OP!
This site https://www.sortedgas.co.uk/boilers explains which boilers should be avoided and which boilers are far superior ones to choose from.
Any make of boiler will work when first installed but for how long?

Your link grouped - Worcester Bosch - Ideal - Baxi - Vokera - together in a second tier (so mine new one is 'second rate' after all); Valiant being amongst the top few.

But putting that aside for the moment, intrigued to know where I advised the OP to spend three-grand on a replacement!?
Previously lived in a 19th century terraced house, had a Gloworm c/htg system about 42" x 15" x 18" with external pump, a real pain, too often problems with the cold water tank float.
C/Htg installer would I had contact with at work (always better to deal with people you know) - installed a Worcester Combi 2003 I think - but not condensing 'too early to know how reliable they are'. Fantastic improvement on performance, and efficiency - gas usage - so no apology for recommending new for very old.

2007 moved to 30s semi - gas boiler sited over gas cooker - !!!!!! - no a good idea. Called the guys back - so yes the fitted a Ferroli boiler. In 2018 had an expansion tank problem - considering the cost went for a new one - different installer - local very experienced plumber - 'no need to pay for the name'.

Maybe a MSE ultimate would be to install it DIY - my late-Father did that in the family home, but then again he also re-wired the house - well remember the channels in the wall being cut, and by trade he was a motor engineer.