Paul;

Then give the advice. If you are so bent on being the perfectionist.... I
tried to answer it as simply as possible. And your correct [symantics.] But
that's fine.

Like I said you are obviously bent on putting other's down. All of your
posts are either telling someone to get the **** out or someone's wrong in
their posting. I haven't truly seen anything positive from your end.

I don't have to put up with your bull either. I can just troll ....

Zyp

p j m@see _my _sig _for_address.com wrote in message
news
On Sun, 20 Feb 2005 13:34:25 -0800, "Zyp" wrote:

John;

This may be a bit lengthy but I'll try to explain as breifly as possible.

The only way you can compare one unit to another [efficiency] is work in
the
same language. In other words, heat [btu/h]. Capacity vs. energy
consumed.

To relate, a heat pump is measured in HSPF [Heating
Seasonal Performance Factor] and COP [Coefficient of Performance.] Both
have relationship [ratio] between the energy consumed vs. heat energy
delivered.

A furnace on the other hand consumes natural gas or propane gas and
delivers
heat energy vs. energy consumed and has a specifiec amount of waster AFUE
[American Fuel Utilization Efficienty]

The easiest way to make a comparison is to convert the energy the 'heat
pump' uses [kWh] to btu/h. (3413 btu/h per kWh). Then compare the amount
of btu/h energy delivered to the occupied space. This is representative
of
the COP. [A heat pump with a COP of say 2.0 has a 'coefficent' of 200% as
compared to a electric strip heater of the same capacity.] Keep in mind
though, that when the conditions change [outdoor temp's] the COP decreases
as well as the capacity delivered.

On the other hand, a natural gas furnace delivers the same btu/h no matter
what the outdoor temperature is. But, is either 80% efficient or 90% -
93%
depending on the model. The remainder of the which goes up the flu stack.

When you compare $ for $ [which if you ask, I will be happy to send you a
power point presentation based on the costs associated with different
energy
sources and different uses] you would find a heat pump actually is just as
effient as a gas fired heater,

Nonsequitor. That's like saying the moon is as low as water -
it simply doesn't make any sense at all, it's gibberish.

What you meant to say was 'cost effective'. This can only be
computed when fuel costs are known and stated ( gas v oil v
electricity ).

provided it doesn't reach a low COP [low
outdoor temp's]. This 'higher efficency' state only occurrs around 70º F
ambient.

Oh, ****ing bull****. WTF are you talking about ? You're
supposing someone runs their heat pump in heat mode when it's 70
outside ??? And that's the 'only' time heat pumps make economic sense
??? Bull****. Nonsense.

When the temp. outside drops to 50º F the COP really starts to
take a dive and the gas fired furnace becomes the winner. [More
efficent.]

Bzzt. Wrong.

At ANY temp above the economic balance point, a heat pump will
continue to provide cheaper heat, IE, 'more heat energy out of it than
you put electrical ( source ) energy into it '.

IOW - even at 30 F or less, a heat pump continues to provide
economical heat. Now, it may very well not provide *ALL* the heat you
need at that point, but what heat it DOES provide is less expensive
than anything else, such as fuel-fired, etc, *IF* the fuel costs made
sense to begin with.

The economic balance point is derived from the cost of fuels
and electricity at the time. In areas with high gas/oil costs and low
KW costs, it makes sense. In areas with high KW costs and low oil/gas
costs, it does not.


The time to consider a heat pump is when other fuels are either expensive,
or unavailable.

I hope this is helpful.

Misleading in it's bulk. You started of with a few simple
facts that you got right, but then you ****ed up completely.

If you're going to give advice on a subject, you should study
it and understand it first.



Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'

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