On Saturday, February 10, 2018 at 8:28:39 PM UTC, Roger Mills wrote:
On 10/02/2018 18:45, David wrote:
On Sat, 10 Feb 2018 18:17:08 +0000, Pinnerite wrote:
This is tricky because I cannot supply full details but this is the tale
(of woe).
I really need some informed advice here.
My daughter and her family are waiting to move into a flat that was
previously my mother's. It has the original floor standing Celsia
boiler, inside a kitchen unit. It is conveniently adjacent to the gas
meter.
The pipes run horizontally behind the kitchen units, through a wall to
the airing cupboard that houses both the cold tank and a hot water
cylinder beneath it. So the pipe runs are neat and efficient.
Behind the boiler is the pipe to the flu that runs through an outside
wall and can be seen at the front of the building.
The height inside the kitchen unit is 889/890 mm.
A British Gas salesman tested the cold water pressure (it looked pretty
fierce to me) and said, "you cannot have a Combi. Pressures too low".
His suggestion was to plonk a wall mounted unit on the opposite side of
the sink which clearly meant serious damage to the kitchen units and an
inefficient pipe run.
This is a two bedroom flat with a largish main room and the kitchen (316
cm x 300 cm).
My four bedroom house has a 110,000 BTU boiler, so I would guess the
flat would around 50,000 to 60,000 BTUs (Correct me if I am wrong).
Is there a floor standing boiler that could replace the Celsia?
The right answer must be worth a beer or three?
Get another firm round and see if they agree with BG.
Especially about the water pressure, although flow rate is usually more
important than static pressure. From your post I am guessing that BG may
have tested static pressure but that you estimated flow rate.
You can buy a water pressure meter quite cheaply if you want to test for
yourself and it is pretty straightforward to time how long it takes to
fill a container of known volume (such as B&Q orange buckets; ours have a
scale on the inside).
https://www.screwfix.com/p/rothenber...pressure-test-
gauge-10bar/53626
£20 and should, I think, fit onto the connector for a washing machine or
dishwasher. Adapters for other fittings are only a few pounds.
Cheers
Dave R
Flow rate is as important as - if not more important than - static
pressure. The OP needs to measure the flow rate at the cold tap which is
nearest to where the mains enters the house. You can do that with a
bucket and a stop-watch.
Zero your bathroom scales with an empty bucket on them. Then hold the
bucket under the full flow of the tap for 27 seconds. Then weigh the
bucket again, so as to weigh the water you collected. The weight in
pounds is the same as the flow rate in litres per minute.
--
Cheers,
Roger
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Pounds/litres? Doesn't sound right