David Wade <g4...@dave.invalid> wrote:
> On 19/12/2023 09:19, Mike Halmarack wrote:
> > I saw this heating and cooling method mentioned on Reddit as a less
> > expensive and more easily installable option for heating three small
> > rooms and a kitchen in a first floor flat.
>
> I am not sure about "easily installable" as it needs to be mounted on an
> outside wall, and then you need large holes in the outside wall, so you
> will probably still need scaffold to install and fit the outside vent
> covers. If there are flats above you may get all sorts of issues with
> putting such large holes in the outside wall.
Appliances Direct brands are just cheap clones, but Olimpia Splendid is one
major brand (they are popular in Italy):
https://www.olimpiasplendid.com/without-outdoor-unit
For those they're designed so you can install them without outdoor access eg
in tower blocks: you drill the hole using a cutter that keeps the core (so
not falling on somebody's head below) and then you fit a duct through the
hole which unfolds to form the grommet on the outside. There is an
additional condensate drain hole, which you will need if you can't drain it
internally.
> I see it also uses an external drain pipe, which they show in all the
> pictures, but don't mention, so you would need to run that down the
> outside of the flats.
It doesn't need to be run down the outside, you can just run a pipe through
the wall. Whoever is below may not like condensate dripping on them,
though. It is probably possible to run it into the internal drainage
system, using a condensate pump as needed (this is common for a/c room units
in big buildings which are far from an outside wall).
Bear in mind that all this is at 'outside' temperature, so you may want to
insulate pipework so it doesn't encounter the icy air.
(it seems these are primarily designed as air conditioners and I wonder how
well insulated the 'cold' parts of the unit are, or whether it's a big cold
lump inside your room)
> > It's said to be designed for a large room, though I don't know whether
> > I would need more than one of these, or be able to transfer heat from
> > a single unit in the lounge.
> >
>
> You will need more than one. That is why we put a radiator in each room.
> I have split units which distribute in the same way. virtually no affect
> on other rooms. Think of it as any other fan heater, just it costs less
> to run.
You could potentially duct air from one room to another, internally. Won't
be as good as running refrigerant (or water) lines though.
> yes you need an outside unit, but that moves the noisy stuff out the the
> room. yes you still need a drain but perhaps you could mount that at
> ground level...
>
> any questions, feel free to ask...
The 'indoor' units aren't a terrible idea if planning prevents you having an
outdoor unit. But they probably work better in a large and airy Italian
apartment than a one bed council flat.
Theo