"Dave Plowman (News)" wrote in message
...
In article ,
Doctor Drivel wrote:
In one job they had reservations on a high flow combi because they
wanted DHW backup. To go for a cylinder or heat bank would have meant
taking up valuable space and more expense. A cheap backup option was a
quality main high flow combi and a cheapo B&Q £300 combi as backup. The
backup was fitted below the main combi (sizable under the stairs
cupboard). To install the cylinder and a new immersion cable and the
rest would have been far, far more expensive that the cheapo backup
combi. The CU breaker, switch and immersion and cable would have been
more than the cheap combi.

They had full DHW & CH backup (OK DHW was reduced flowrate) and the same
gas supply was used for both as they would not be on at the same time -
a throw over switch was use to prevent both being on. The cheapo combi
would be used once in a blue moon, so no reliability problems. The
pipework and effort in installing the extra combi was negligible.

So cheapo combis have their uses.

Excellent idea. Cheap combis are known for their reliability - far better
than an immersion heater. And of course everyone has room for one along
with the main one.

Remind

Please eff off as you a complete and total idiotic plantpot.