On Mon, 07 May 2018 22:09:41 +0100, trader_4 wrote:

On Monday, May 7, 2018 at 2:05:17 PM UTC-4, Jimmy Wilkinson Knife wrote:
On Mon, 07 May 2018 18:54:21 +0100, wrote:

On Mon, 07 May 2018 18:15:37 +0100, "Jimmy Wilkinson Knife"
wrote:

On Mon, 07 May 2018 15:36:47 +0100, Unquestionably Confused wrote:

On 5/7/2018 9:08 AM, Jimmy Wilkinson Knife wrote:
On Mon, 07 May 2018 15:05:56 +0100,
wrote:

On Monday, May 7, 2018 at 9:44:59 AM UTC-4, Jimmy Wilkinson Knife
wrote:
On Mon, 07 May 2018 14:36:24 +0100, KenK
wrote:


[snip]

Why on earth could an AC unit not run backwards? You just reverse
the pump. Every one I've seen in the UK (commercial and home) has
been able to do this. The controller usually has settings for
heating, cooling, or automatic. On automatic you can simply set a
range (say 18 - 22C) and if it goes over, it cools, if it goes under,
it heats.

What you're describing is what is referred to a split unit system or
inverter. After screwing around with a through the wall A/C unit which
was noisier than all get out in the size needed to cool the addition, I
finally got smart and picked up a split system (air handler inside,
compressor/inverter outside). What a difference. Very quiet (hard to
tell it's running, actually), and much cheaper than our old A/C unit.
And, as you say, when heat is needed, the system reverses itself and
heats the interior drawing heat from outside even when it's in the 20F
degree range outside.

I wasn't aware they still made the one way systems. I know of several commercial and domestic places around here in the UK who have had AC units fitted (and they only wanted to cool the room down), and they're all reversible.

Heat pumps are not used much here in South Florida either. I have a
Mini split heat pump and I don't think the heat function has ever been
used. There are heat strips in the air handler for the central air
system and I doubt they have ever been on either.
My wife has a little 1.4 KW heat strip in the electric fireplace in
the living room and that is all she ever uses. That is still very
seldom. Nobody has a furnace.

I guess it depends on the weather where you live as to what gets manufactured.

--
If god is so amazing, why did the dinosaurs die out?

Wow, you really think so, Sherlock?

You'd think in the 1st century manufacturers would make stuff for the international market.

(I'm assuming you're referring to my reply, not my sig, which for some reason you quoted).

--
Murphy says to Paddy, "What ya talkin into an envelope for?" "I'm sending a voicemail ya thick sod!"