"David" wrote in message
om...

Has anyone tried pumping the hot air form the top of a conservatory
into the floor ?
I am planning to put in a thick concrete floor above insulation
(polystyrene ?) and am thinking about laying 4 or 6 inch drainage hose
in the concrete. Then with a couple of fans, piping the hot air from
the roof apex down under the floor.
The idea is to use the concrete pad as thermal storage, keeping the
conservatory warmer on marginal evenings.
It may still be necessary to vent some or most of the hot air on hot
days, but the system could be useful for some of the year.
The fans could be thermostatically controlled so that if the air temp
rose above say 22C they start to store the excess heat.
Anyone have any experience with this ?

Good idea to store heat for later use. But will the sun be playing on the
conservatory floor storing heat in the thermal mass anyhow? Heat stored
further down the concrete slab may not rise into the room above in time to
be useful. It is called admittance. Have tiles on the conservatory floor or
better still have slate tile which have a very high admittance value.

When installing ducting under floors with air running through beware of
condensation inside. They are fine in dry climates, but in the damp UK?
Also have fine mesh grills to stop rodents and insects crawling through and
if possible access to clean the ducting.



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