Boiler Quote: Viessmann 30kw v 35kw

bajangal

Been quoted for new combi boiler. Two bedroom detached bungalow. Mainly 1 person. Removing hot water tank from airing cupboard and boiler from kitchen wall. Can you cast your eyes over these quotes and I welcome your feedback. Both of these are from Gas Safe companies. Thank you.

QUOTE 1
1) Isolate & drain down existing heating & hot water system.
2 )Disconnect and remove existing boiler and water tank.
3) Power flush
4) Supply and install 35kw Viessman Vitodens 100w boiler in airing cupboard.
5) Supply and install new vertical flue.
6) Supply and fit an inline limescale reducer on mains inlet to boiler.
6) Supply and install new magnetic system cleaner (magnaclean or TF1).
7) Run new gas supply from meter to boiler position.
8) Carry out pipework to suit new boiler.
9) Install small radiator in airing cupboard. (This will now be in the kitchen)
10) Install condensation pipework from boiler to drain.
11) Pressure relief pipe to run under bath to exit wall to garden
12) Install wireless digital heating programmer.
13) Connect electrical supply to existing fused spur that fed old immersion.
14) Introduce system inhibitor to comply with manufacturers benchmark
15) Make good old flue hole inside and out
2599.10 (inc VAT)


QUOTE 2
Remove existing boiler, hot water cylinder. Supply and fit 30kw Viessman combi boiler in airing cupboard. Flush out system, make all connections to existing heating, hot and cold water supplies. Install new gas supply to boiler as necessary and connect to existing. Refill system and test. Install inhibitor. Supply and fit programme remote room thermostat. 1920 (inc VAT)

ormus

for a two bed house with one bathroom you dont even require a 30kw boiler.
id be looking for say a 24kw boiler fitted for under 1500 quid.

gas4you

ormus wrote: »

for a two bed house with one bathroom you dont even require a 30kw boiler.
id be looking for say a 24kw boiler fitted for under 1500 quid.

Thats fine if the OP only has showers, but running a bath in mid winter with a 24Kw combi will be very stressful.

cajef

gas4you wrote: »

Thats fine if the OP only has showers, but running a bath in mid winter with a 24Kw combi will be very stressful.

It always amazes me how someone can advise what size boiler would be be needed and about how much it would cost to install a new boiler without knowing the customers requirements or the work involved at that particular location, they must be psychic.:D

Canucklehead

cajef wrote: »

It always amazes me how someone can advise what size boiler would be be needed and about how much it would cost to install a new boiler without knowing the customers requirements or the work involved at that particular location, they must be psychic.:D

Hi...my thoughts exactly...you must be reading my mind.;)

Canucklehead

ormus

i can only tell you what we would pay in this area.
as for the bath, we all know that filling a bath with a combi boiler, is a right laugh.

gas4you

Combi's are always sized for hot water use. Not heating. Anyone who doesn't realise that either has no experience or simply hasn't a clue what he/she is talking about.

Ormus has hit the nail on the head with his last post.

cajef

ormus wrote: »

as for the bath, we all know that filling a bath with a combi boiler, is a right laugh.

Do we, which we is that, so you can speak for everyone on here?

Well this we never has a problem filling our bath with our combi boiler, maybe because we had the correct advice from someone that knew what was required when it was supplied.

bajangal

ormus wrote: »

for a two bed house with one bathroom you dont even require a 30kw boiler.
id be looking for say a 24kw boiler fitted for under 1500 quid.

Thank you. The figure you quote is much less than I had expected. I will have a word with the installer tomorrow.

bajangal

gas4you wrote: »

Thats fine if the OP only has showers, but running a bath in mid winter with a 24Kw combi will be very stressful.

I do have 2 baths a week. The rest of time showers. When my son comes over he has the longest showers ever.

bajangal

Thanks for all the replies and comments.
Am I to summarise that for a 2 bed, 1 bathroom bungalow with 6 radiators, mainly having showers but 2 baths per week that the 30kw would be adequate and the 35kw would be overkill?
or
should I just get the 35kw for the extra constant hot water?