"Simes" wrote in message
om...
Hi,

Following on from my kettling post.

My father wants the old boiler out and a combi fitting. He had a visit
from a recommended CORGI guy who suggested either a Vokera or
Ravenheat/Biasi for a budget option. I queried Ravenheat but the guy
insists that they were pants but have now improved massively.

Anyone agree/disagree?

Simon.

What is his hot water usage? Does he take frequent baths and requires fast
bath fills? If not then a decent combi is the way. Good simple combi's are
Ferroli Modena and Worcester Bosch Junior at around 11 to 12 litres/min.
Great for frequent showers and a simple designs with no 3-ways valves.

If he wants high flowrates it is cost effective to use two Juniors and
combine the outlets. Worcester will supply a drawing on how to do it. Two
Juniors are available for around £1000 to 1100 depending on what sized units
you buy. They have 24 and 28 kW you could use two 24kW or two 28 kW combi's
or one of each. That is cheaper than the Worcester HighFlow 18 litres/min
floor mounted combi and can deliver about 21.5 litres/min and never run out
of hot water.

Have one combi do the downstairs heating on its own programmer/timer and one
do upstairs. Natural zoning, so you don't have to heat upstairs when you
are not up there. No external zone valves either, and simple wiring up too.
Also if one goes down you will have another combi to give some heat in the
house and DHW too. Combine the outlets for DHW and all the baths you want
very quickly and no waiting. It will do two showers no problem at all. A
win, win, situation.