Will definitely need a 22mm feed
Quailty Black Label EN 1057 Copper Tube 22mm x 3mtr length presently £19:98p @ B&Q, joiners, elbows about £1- £1:50p each.
I actually had a hat on in bed lolWe changed our boiler a couple of years ago from an old Worcester to a Veissmann. The old system wasn't a combi though.
Bills plummeted. In fact so much so that we now leave the heating on all the time (on a thermostat) rather than timed. I do work from home though, so it makes sense. Whereas before I'd just wear more jumpers. Bills are still much cheaper, another year or two and the boiler will have paid for itself. Despite having 24hr heating.
That seems a really good dealI paid £2500 recently
WB 30CDi
7 Rads (various sizes and BTU)
6 TRV's (Drayton TRV4)
Wireless programmer (Proper WB one)
Work involved.
Removing old water tank and overflow tank.
Reomoving old boiler.
Moving boiler to a different location and installing
Connecting up to mains gas.
Moving and replacing all radiators.
New plumbing on 2 floors.
Chemical flush and inhibitor.
Took them 3 days.
Yeah the TRV's and thw wireless controller can cut the cost hugely.
But I read some of the cheaper TRV's were utter junk and thought I dont plan on redoing this anytime soon.
That would be a Valiant EcoTec plus 837, but have a look at the Vaillant Ecotec Plus 937 Power Store Combi Boiler, which has twin 7.5 ltrs tanks of store hot water.
The hot water flow rate is even higher at 15.2 to 20.0ltrs.
http://www.vaillant.co.uk/stepone2/data/downloads/f4/42/00/ecoTEC_plus_937_sales_brochure.pdf
My boiler is sited kinda outside in a small brick 'lean to' type part of the house and might not have enough room for both housings,hmmm
Confused?
The twin water cylinders are within the boiler.
Depth of boiler is 597mm, so a little deeper than a normal boiler.
Shows layout design in brochure link.
I'd replace the rads, or atlest have them cleaned, you'll be suuprised how much gunge gets built up over the years in em.
24kw should be sufficient for a decent 3 bed semi, before you upgrade the boiler i'd replace the rads, or atlest have them cleaned, you'll be suuprised how much gunge gets built up over the years in em. Its a pretty decent boiler that tbh.
I'd also look at how well insulated your house is too, that again can make a big difference in terms of heat retention, for eg, my place has double glazing, but the seals are old so lots of cold air can get in.
Well if your considering replace the whole lot, then split the heating into two zones ground & 1st floor with seperate room stat for each zone, it's known as Full Zoning, .