quote for replacement conventional boiler for combi

t45

Hello,
I live in a top floor (3rd floor) conversion. The property is quite old. I currently have a very old conventional boiler and cylinder with tank etc in loft. They have been in the property for a number of years .
I am looking to update the property across all areas (electrics, plastering etc etc) including boiler and system. I am looking at a combi boiler if this is possible to install in this type of property.
What would be the approximate costs of such work – I have had a quote of just over 5K – i can provide breakdown of costs.
i’m not sure what i should consider to be reasonable.
The property is 2 bedrooms, all on one level with 6 radiators, 2 of which will be removed. The others remaining will be replaced with thermostatic valves.
The current system is gravity fed – my cooker hob is gas fed, oven is electric and shower is fed from the water system. In order to accommodate a combi (i believe they require more gas feed than a conventional??) I will replace oven as all electric and also electric shower. Mains are outside at ground level and piping comes up to my level but not sure how thick the pipes are by the time they reach me on level 3 – could there be an extra cost for this piping if it needs to be widened or replaced to accommodate gas feed to a combi boiler?
Any ideas of approx cost would be most appreciated.
Thank you.

diywhynot

Post the quote up for informed (and other ) comments.

t45

Hi there, this is my quote for a Worcester-Bosch Greenstar* 25 is Compact combination condensing boiler. Price is £5, 115 plus VAT.

My discounted price is £4, 765 plus VAT – and this is all exlcluding the extras like scaffold and flushing etc.

Any thoughts on whether this is about right would be welcome.

My property is a top floor (3rd floor), 2 bedroom flat with 6 radiators – 2 of which will be removed. So in effect this will be for 4 radiators only. It is a small property.

Thank you.


Installation details:
Convert existing system to a pressurised combination system
Remove and dispose of existing boiler, cylinder, and cold water storage tanks
Locate new boiler on the wall, as high as possible above the existing appliance
Condense to be pumped to the loft, out through the roof, and connect to the soil stack
Carry out a full system power cleanse using a KAMCO CF90 Clearflow pump (NB not a power 'flush')
Notify new appliances (as required) with the Gas Safe Register and the relevant Local Authority

Parts, materials & heating controls:
System cleansers and inhibitors
Electrolytic scale reducer
Vertical flue kit + elbows, brackets and extensions
Flashing kit
Integral filling loop
DT10RF wireless programmable room thermostat
3 amp fused spur + box
Junction box 6 way
Condensate trace heater kit
Condense pump
Freezer kit
All other required materials

Manufacturer warranty 7 year free extended warranty covering parts and labour for all boiler breakdowns or malfunctions

Price £5,115 + VAT

Discount £250 + VAT (this if for green scheme offer)
Discount £100 + VAT if deposit is paid within 5 days of receipt)

TOTAL DISCOUNTED PRICE £4,765 + VAT


These are also extras that would need to be added too:
To remove and dispose of existing asbestos flue TBA.
To erect scaffolding in order to gain access to the roof TBA.

Highly recommended installation upgrades**

Carry out a full system Powerflush* using a KAMCO CF90 Clearflow pump £395 + VAT

Optional extras and upgrades**
Supply and fit thermostatic radiator valves P.O.A.

[Deleted User]

This seems a bit high to me, I got a british gas quote for upgrading to a worcestor combi with poweflush and it's just under £4000. I suspect running your condensate up to the roof is adding to the cost in your quote. I'd recommend getting at least three quotes, the other estimators might also come up with better ideas about how to route the flue and condensate.

diywhynot

t45 wrote: »

Hi there, this is my quote for a Worcester-Bosch Greenstar* 25 is Compact combination condensing boiler. Price is £5, 115 plus VAT.

My discounted price is £4, 765 plus VAT – and this is all exlcluding the extras like scaffold and flushing etc.

Any thoughts on whether this is about right would be welcome.

My property is a top floor (3rd floor), 2 bedroom flat with 6 radiators – 2 of which will be removed. So in effect this will be for 4 radiators only. It is a small property.

Thank you.


Installation details:
Convert existing system to a pressurised combination system
Remove and dispose of existing boiler, cylinder, and cold water storage tanks
Locate new boiler on the wall, as high as possible above the existing appliance
Condense to be pumped to the loft, out through the roof, and connect to the soil stack
Carry out a full system power cleanse using a KAMCO CF90 Clearflow pump (NB not a power 'flush')
Notify new appliances (as required) with the Gas Safe Register and the relevant Local Authority

Parts, materials & heating controls:
System cleansers and inhibitors
Electrolytic scale reducer
Vertical flue kit + elbows, brackets and extensions
Flashing kit
Integral filling loop
DT10RF wireless programmable room thermostat
3 amp fused spur + box
Junction box 6 way
Condensate trace heater kit
Condense pump
Freezer kit
All other required materials

Manufacturer warranty 7 year free extended warranty covering parts and labour for all boiler breakdowns ormalfunctions

Price £5,115 + VAT

Discount £250 + VAT (this if for green scheme offer)
Discount £100 + VAT if deposit is paid within 5 days of receipt)

TOTAL DISCOUNTED PRICE £4,765 + VAT


These are also extras that would need to be added too:
To remove and dispose of existing asbestos flue TBA.
To erect scaffolding in order to gain access to the roof TBA.

Highly recommended installation upgrades**

Carry out a full system Powerflush* using a KAMCO CF90 Clearflow pump £395 + VAT

Optional extras and upgrades**
Supply and fit thermostatic radiator valves P.O.A.

Horrendous:eek: Quotes from recommended independents, compare like for like. Boiler spec is poor. V. low flow rate and not WB's best product. Assume mains water flow and pressure have been measured?

t45

Thank you DIY and Spartacus – I agree - think this quote is quite a lot.
People tend to say that BG quote quite high but this isn’t even BG – thank you – I will ask some independents for some quotes and also get a quite from BG.
The engineer who gave this quote said the piping could be a risk but he would have no means of knowing until the work was complete and then they would try the system which at this point if it didn’t work they would need to add extra costs for scaffold to do piping etc. I would expect by this point if I paid out 5k I would not be happy to have to pay out additional costs for the scaffold and piping but I would have no choice as everything would be fitted and if it didn’t work I would have to pay out more.
Would either of you recommend either locating the piping in my kitchen from my current boiler and seek what size it is – I believe from what I can see in my boiler cupboard the gas pipe is 22mm but whether this is greater on the pipes below the floor and out through the building I do not know.
I do know that the starting pipe at the mains at ground level is very thick –but whether or not this decreases with height I do not know. I also know that the other properties in the building do have combis.
Out of interest, what boiler would you suggest for a combi in this size property and would it be a Worcester Bosch? how about the Valaint boilers or Glow worm or any others?,...any ideas, any recommendations.......
Thank you so much, this site is invaluable as are the comments left by all of you informed members.

t45

...also this as the quote without adding cost of potential paperwork nor the cost of removing and disposing the asbestos flue........
Incidentally how much would be approximate price of additional pipework to top floor – 3rd level?...any ideas of approximate costs.....I guess scaffold would be required too......
The engineers did say that if scaffold was required they have a sub contractor that although are expensive, they are very good....so i guess we would also be looking at a higher cost for this too.......

[Deleted User]

I'm looking at getting a WB boiler, as they seem to have the best reviews. Regarding the piping, again I would get some more quotes in, I was surprised by the different stories about what could and couldn't be done that I got from different plumbers. It's a tedious process getting different quotes, but for a big expense like a boiler I think it's worth it.

The quote I got from BG was not much higher than from a local plumber, and included some more add-ons, and was fixed (so nothing more to pay no matter what problems they find apparantly). So I'm thinking of going with BG at the moment.

diywhynot

OP: what make and model boiler is being replaced? Did you ask for a combi quote or was it recommended to you? Your location in the UK will impact on price.

We install Vaillant and Glow-worm products. Mixed reviews on WB from RGIs.

diywhynot

[quote=[Deleted User];64300876]I'm looking at getting a WB boiler, as they seem to have the best reviews. Regarding the piping, again I would get some more quotes in, I was surprised by the different stories about what could and couldn't be done that I got from different plumbers. It's a tedious process getting different quotes, but for a big expense like a boiler I think it's worth it.

The quote I got from BG was not much higher than from a local plumber, and included some more add-ons, and was fixed (so nothing more to pay no matter what problems they find apparantly). So I'm thinking of going with BG at the moment.[/QUOTE]

How many quotes have you had and have any of them been from RGIs recommended to you? Perhaps you could post up the details of specification/quotes for guidance.

t45

thank you - i am in the process of getting some other quotes.
we had a quote from big company early in week and this was also closer to 5k!!!! and again scaffold seemed to be a big add on....and the installation/conversion fee was very high.....and this was for a worcester bosch combi installation - current system is old, conventional boiler potterton kinffisher so this needs to go (even though it hasnt actually broken down!!!) - a combi would free up much needed space in out kitchen and loft area......i will get some quotes from rgi installers as i think this may save some money as these big companies must be charging high amounts for a reason!!!....out but combi is better than what we currently have ....i live in surrey (so maybe they add on some fee because of location!!!)....i asked for combi quotes as this is what would seem to be best for my lifestyle needs - i also live in a flat, good size.......i shall keep you all informed.......thank you all for your help and ideas - very much appreciated.....