Hi Bob
On (25 May 96) Bob Knowles wrote to Alec Cameron...
 BK> It is my understanding of underfloor heating that you do not use it as a
 BK> the whole heating system but as "background heating" IE you may aim for
 BK> 16 c (61 f) with your underfloor heating and then top up the rooms that
 BK> you are using with other forms of heating. This tends to stop the
 BK> problems that one has with quick changes in the outside temps as we have
 BK> here in Oz. Mind you I would be aiming at a higher design myself than
 BK> 16 c as I hate the cold and wouldn't mind if the indoor temperature went
 BK> up a bit during the day.
Which says something about "comfort" levels. I am sensitive to increments of 

C deg, and if alone at home [winter] the room is held in the range 18- 19C. 
f
working hard [rare!] I set down to 17C.
 BK> I would have thought that the reverse cycle unit down there would have
 BK> been a bit dodgy because of the low out door ambient you experience, do
 BK> you have a electric element booster in it?  Usually around 7c (45f) the
 BK> output of reverse cycle on heating is only equivalent to electric 
eaters
 BK> of the same power consumption.
When we lived in Epping, the freezing of the outdoor evaporater in winter was
a big! nuisance. On cold mornings, the a/c was virtually useless.
But here in Bundanoon the humidity is so low as a rule, there is little frost
build up on the coils. No, have no booster but we get effective heating at
outside air temps below zero C, but remain conscious that it could be cheaper
to run resisitive heating then. These are the circs when the gas heat in the
next room is turned up. I tend to washup yesterday's dishes! very early a.m.
which raises the rooms' comfort with added heat [off peak] and humidity.
Thanks for describing your system. You have worked at it!
 BK> BYW I am glad it was you having the 2.5c (36.5f) the other morning, real
 BK> brass monkey weather.... I complain when it goes down to 10c (50f) here
 BK> even lowder if it drops to 5 which is rare thank goodness.
Chicken! At 10C I often make a dash to the backyard, in shirt and pants. But 

sure hurry back inside!
Cheers.....ALEC
... FLASH! Energiser bunny arrested, charged with battery.
--- PPoint 1.92
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