Alright, with this is stream
cold on the way, we've got a lot
of good questions on Facebook and
otherwise about if you have a heat
pump in this situation is going to
be able to keep your house warm.
So let's start with the broad answer,
which is it depends on where you're
going to be here on Saturday
morning as far as where you live.
And what heat pump you have,
so along the coast I'm forecasting
around 13 to 15 degrees below 0
and what you're looking at here is
heating capacity at low temperatures.
Now this is not an ad for Mitsubishi.
Right now Mitsubishi and visit you
have the two best cold weather
heat pumps on the market.
And so in the red line there you're
seeing when the temperature drops
down to 13 degrees below 0 outside it
can provide 73% of its rated BTU's.
So you know if you have.
30,000 BTU system,
you're going to get most of the BTU
still out of that system at that temperature.
Some of the older heat pumps that don't
have the same type of inverter technology,
they've got a different way of
running refrigerant and the fan,
they drop more drastically and
when they get down to zero,
they really start putting out way less heat,
in some cases about 50% of the heat.
So let's say you have one of the
better systems, it will keep you warm,
give or take, to 131415 degrees below 0.
But if you've got a backup system,
the question you ask yourself is
how efficient will the heat pump
be at those temperatures?
So what we're looking at here
is something called the COPD.
It's a coefficient of performance.
And so essentially that means for every
kilowatt of energy put into the system,
how many kilowatts of heating
is it giving you?
So on a, on a relatively mild day,
a heat pump can operate at a 3.5,
which means basically the 350% efficient.
So they're really, really efficient.
But notice as the temperature.
Ups down,
you can see them in the bottom to Five Below.
You get down to COP of two or so,
and if you get really low you
can get down to 1 to one,
which 100% efficiency sounds great,
but it's actually the same as a space heater.
So a space heater is 100% efficient when
you're running it on a heat pump system.
It's going to start costing you more
and more money the lower that COP goes.
So if you're able to switch over,
it would be smart to do so when
we get very cold here.
The last frontier here guys,
is if you have an air handler.
Quite a few of those have an axillary
heat resistance strip was shown there.
So what happens is if the heat pump
cannot produce heat at extremely
cold temperature,
it'll kick that in and just pump
that out through your vents.
So I think along the coastline here,
I mean, I know because I have them
and we've gotten this cold before,
it's been able to maintain my set point.
If you're in a spot that's going
to be 25 below for 12 hours,
then you're either going to get a
reduced amount of heat or you're
not going to really get much heat.
Ball. Yeah. And so, you know,
is that gonna be catastrophic or not?
It depends on your insulation.
It depends on a number of factors
because that makes sense though,
kind of a case by case.
Well, you know, I don't know if
our production team is able to
pull up that first graph again.
And while they do,
this is something that comes up all
the time when we talk about heat pumps,
their efficiency and these
extremely cold temperatures, right.
Ohh, once it gets down to zero, you know,
is it going to lose all its efficiency?
It doesn't lose all its efficiency,
but it's not operating at the
best. Here's what took me a second.
Of this particular graph to
understand we're actually
reading this from right to left,
not left to right necessarily.
So you think you know the
temperature is dropping.
You should start on the right side.
47 is a high temperature,
right and go down to the
left towards -, 13 degrees
and it keeps going down.
And and one final point is this particular
system says it shuts down at 22 below.
But then I had a guy on Twitter
who owns cabins and Caribou and
he said it was 32 below on it
and it kept putting out heat.
I don't know.
I've never seen mines never shut down.
I don't know for sure,
but certainly it gets dicey
at that 15 to 20 below zone
if the if it's your when.
I've spoken to people with
efficiency Main before.
Yeah, it's always been.
If this is your only source of heat,
obviously keep running it right.
But if you have an option like
a wood stove or even use heating
oil for these extremely cold days,
yes, as far as what you're
paying to operate the system.
It's probably better that for that.
Yeah, that's the time.
Yeah, interesting.
Alright, Keith, nothing to ask.
Nothing.
It's just because we spent
too much time on this stuff.
That's what it is.