"Gary R. Lloyd" wrote in message
...
On Sun, 21 Nov 2004 10:01:15 -0500, "Steve@carolinabreezehvac"
wrote:


"Astro" wrote in message
newspshte04v1v1dc2q@athlon2600...
Anybody had any experience with the Nyle "cold climate heat pump"? This
is
a standard, air-source heat pump that claims effective heating down to
0F.

http://www.nyletherm.com/spaceheating.htm

Reading the blurb, it looks like it's just a two stage compressor
system.
So I'd guess in their example, that what they're selling as a 3-ton
unit
is something more like a 6-ton two stage which runs at 3+-tons until
some
critical temperature (around 30F?) then kicks in the second stage for
extra output. Nothing revolutionary. But it does seem to get around the
standard complaint of normal heat pumps not being able to keep up with
load requirements at low temps.

The reason this caught my eye is that I'm looking at replacing a heat
pump
in one of my rental properties and I'd like to put in something "eco
friendly". Geothermal is not an option, and I was planning on putting
in a
high efficiency Carrier or Lennox HP or maybe a York Stealth. This Nyle
unit showed up as an added option but I'm a little loathe to get a unit
that nobody's ever heard of.

Any thoughts?

Its BS...and its not a 6 ton with a dual stage comp....its a dual stage
comp
alright, but the capacity is not even close to 4 tons.
You can only get a COP of so much...once that is passed, you WILL have a
form of secondary heat needed....period.

If you are looking at the Stealth, (soon to be discontinued) You might
want
to spend the extra $200 and get an Affinity by York.
Lennox parts are impossible to get and Carrier designs are not static.


Seems I recall some years back reading about a heat pump with a small
gas burner in the outdoor unit which added just enough heat to prevent
the coil from freezing in subzero temps.

I wonder whatever happened to those?

_______________________________

Liberals are thieves and dictators, unlike
conservatives who are dictators and thieves.


York used to have a nat gas powered heat pump...it had a Briggs and Stratton
engine that powered the compressor and the heat generated by the engine was
removed by the refrigerant and sent back into the system..
Called the Triathlon...it was a failure due to several reasons...lack of
trained installers...lack of service by owners....it just didnt fly.
It would have been great had it been marketed right....

You can get ammonia units still, Arkel, that use a gas burner for AC and
heating....but unless you want a huge fuel bill, its best to simply go with
a gas furnace.