Pricing a boiler change

[Christopher buzzard]

Hey. 1st post so sorry if it's been asked/answered before.
Gas safe engineer for 13 years but through my firm which I still work for. 3 months ago I applied for my own registration number so I can do minor gas works outside of my normal working hours. Now out of my probation period. The advice I'm seeking is that I've had a friend who asked to have a new boiler fitted. Change from a non condensing system to a condensing boiler system. Boiler going in the same place. Use the same flue hole. Run condensation, upgrade 15m of gas pipe to 28mm, full power flush and fit A magnaclean filter. He will buy everything so I only charge labour. That's what I'm struggling with. I haven't a clue how to charge for something like this. Do I charge hourly? Is there a rough guide as to what to charge that someone could help me with.
Any advice appreciated

 

[ShaunCorbs]

day rate i would allow 3-5 days depending on what needs to be done

 

[Scott_D]

Change to a combi?

 

[Christopher buzzard]

No sorry Scott. . Keep a system boiler but condensening. Minimum pipework alterations to boiler. Apart from gas pipe upgrade.

 

[Last Plumber]

No sorry Scott. . Keep a system boiler but condensening. Minimum pipework alterations to boiler. Apart from gas pipe upgrade.

28mm?

Why such an increase?

 

[Christopher buzzard]

Hey. MI require 20 mbar working pressure. Comes out of the floor in 15 mm copper to the original boiler and disappears. 22 mm comes out of the meter which is the other side of the house. Airing on the side of caution and experienced I wanna upgrade it.

 

[ShaunCorbs]

What size boiler ?

 

[Christopher buzzard]

25kw

 

[ShaunCorbs]

25kw

Yea I would do it in 28mm

 

[London Gas]

What area do you live in?

In London I would price this by the day but you need to weigh up what you need to cover your time and what you want a friend to pay, most companies I have subbed to would charge anywhere from 4-600 a day for this type of work.

 

[Christopher buzzard]

Cheers London gas. On the east coast. Suffolk. Nothing like those day rate prices here!

 

[Gasmk1]

£250.00 upwards for a day rate

 

[Last Plumber]

What size boiler ?

Regardless of route and distance ?

 

[ShaunCorbs]

Regardless of route and distance ?

25kw any more than 4 elbows and you need 28mm due to the distance

 

[king of pipes]

£600 is a fair price i am on the east coast maybe £500 For a mate time hmrc has had their bit it not over the top . cheers kop