Any plumbers advise if this quote is reasonable: £3400 (cash):


1. Add Cleanser to the central heating system prior to works commencing.
2. Drain down and remove the existing Glow-worm Hideaway central heating boiler.
3. Drain down and remove the existing hot water cylinder, cold-water tank and header tank.
4. Supply and install a Worcester 440 Cdi condensing combination boiler above the existing boiler position.
5. Run a new 28mm and 22mm gas supply from the garage in the exisiting boxing to the new central heating boiler.
6. Supply and install a TD 200 plug in programmer.
7. Supply and install a RT 10 room thermostat.
8. Supply and install all pipe-work and wiring.
9. Brick up the existing flue.
10. Tile the floor area beneath the existing boiler position to allow the new jig to be fitted.
11. Supply and install new chipboard to the area beneath the existing tank positions in the loft area (5 sq. m).
12. Fill, test and commission the central heating.
13. Add inhibitor to the central heating.
14. Replace TRVs and lockshields on all 12 radiators (11x Drayton TRV4, 12x L/S with integral drain off, and 1x wheelhead)

Like the (cash) in brackets is it a tax fiddle.

Price for the center of London would be good.

Is the Installer Registered or is it a BG quote

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Installer is Gas Safe Registered and a Worcester Bosch accredited installer and hence the work comes with a 6 year manufacturer backed warranty.
We live in Cheshire.

Aren't boilers etc rateable at 5% and not 20% anyway? But to answer your question yes I assume its VAT evasion.

VAT would be 5% & 20%.

£3000.00 including VAT for a top job would be nearer the mark.

Is the mains pressure and flow up to the job, and will 20ltrs/min replace what you what need.

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Really?

£3500 was the best quote we had. All the others were £3600-£4000. I'm sure this may be because they are Worcester Bosch installers. We did get one from a plumber who wasn't but his quote wasn't any cheaper. We wanted the peace of mind of a 6 year warranty. But it on the other hand it seems unlikely to me that anything can go wrong in that time period.

Yes one of the plumbers checked the mains pressure from the outside tap. Also the hot water outlet from the boiler is being upgraded to 22mm from the current 15mm.

I'm wondering about the DHW flow rate. I know the Highflow have a large heatbank (60 litres ?). After that has been depleted what flow rate would we expect to get from the 440CDi? Would it really be 20l/min?

What are the hot water needs.

I'll check the manual.

20ltrs/min is at 35 degree temperature rise, so should be constant.

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We have two bathrooms: one main and one en-suite. We currently have electric showers in both but the main bathroom is going to be renovated and a mixer valve shower installing.

Its 5 bedroom house and we general have a high hot water demand in winter. The 550CDi Highflow goes outside our budget.

Don't like the sound of high demand in the winter, that's when it will be at it's lowest.

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What would you recommend? You mean Mains Pressure is at its lowest?

No, the mains is at it's coldest.

Lets assume the mains is 10c at the moment, so the boiler can deliver 20Ltrs/min at 45c.

In the winter the mains could be 3-5c so you'll only be getting 20Ltrs at 38-40c, so to get it hot enough for a bath you would need to reduce the flow to say 18Ltrs/min.

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DHW flow rate should be fine. I find it hard to believe that I could get a quote for £3000 inc. VAT.

Probably won't if they are all approved installers, and know each other.

You need the 6 year warranty that's guaranteed.

You need an annual service to keep it.

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What do you think of the WB Highflow models?

DV, you are fitting a Worcester Tupperware Bosch combi & it's going to cost you £3.4K(Cash)!!! Bloody Hell!!
You'd get a better quality boiler & an unvented cylinder system cheaper than that. This 6 year Warranty thing is a complete scam. Just watch them squirm out of that, I mean will the plastic in these WTB boilers last 6 years??

A good system boiler & a 200Ltr UV cylinder would cost no more than £1,500 + install, where do they get £3.4K from??
Christ, I wish we could get these prices here in Glasgow.........

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