Andy Hall wrote:
On 2008-01-23 01:02:29 +0000, "Clot" said:

Andy Hall wrote:
On 2008-01-23 00:26:22 +0000, "Clot" said:

Mark wrote:
Conservatory heater:
I was thinking along the lines of a gas wall heater such as a
Drugasar (only name I know for these heaters).

I've no experience of them. Would they go on a wall that is 600mm
high?


I suspect depends upon location and intended use. I have a south
facing aspect on a 25yo brick built house where I'm thinking of a
4x5m dwarf brick wall and uPVC D/G. I could extend and drill
through my gas heated CH at the time of construction ( the boiler
has the capacity) and I shall be putting in a power supply for
standard lighting/ TV/ light power use. At present I am favouring
not extending the CH and just relying upon an electric fan heater
for when we will occupy the space.

For that, when it's very cold, you may need two fan heaters of 2kW
each or at a pinch a 3kW may be enough.

I would do the heat loss calculations for it, but it will be in this
sort of range based on scaling from what I did.

If use will be occasional, then fan heaters are a reasonable
solution. Obviously it will get expensive for long periods of use,
plus there is the noise issue.

Thanks for the comment. I agree with both aspects. I anticipate only
occasional use in evenings in early Spring / late Autumn and
possibly during mid day in winter to read the newspaper at weekends!
Extending the CH under the floor in essentially an "outbuilding"
could be asking for fun when trying to track a problem wih the CH at
a later date is my current thought!

If you are going to have to run pipes under the floor, then what you
could do is to put them in during the construction but leave them
unconnected. That way if you do decide to use a radiator or a fan
radiator later, it won't be disruptive. Obviously if the pipes were
to run on the cold side of any insulation, you would need to make sure
that they were well insulated.

Are you going for a concrete floor or wood/chipboard?

Concrete. Thanks for the suggestion of a plastic sleeve.


- For concrete, you can use plastic pipe. John Guest and others
manufacture a sleeve pipe which is larger than the water pipe. You
lay this into the concrete during construction and then the water pipe
is run through it. The idea is that you can insert new lengths should
you ever need to (which is highly unlikely).

- For wood you can put hatches in the floor.

Either way, this is all easily done during construction, less easy
afterwards.

Quite!