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Harnessing America's heat pump moment

heatpumped.org

11–20 of 571 posts

Re: Harnessing America's heat pump moment

#11
One other challenge is for existing homes a water heater may only have a gas line running to it. Want a heat pump hot water heater? Hiring the electrician alone, not to mention potentially ripping up walls will ruin any economic advantage.

Re: Harnessing America's heat pump moment

#12
post #9

Earlier quoted context omitted.

Cold climate heat pumps have improved a lot, even in the last 10 years. Modern models can maintain comfortable temperatures down to -15F (-26C). Lots of happy customers in this reddit thread: https://www.reddit.com/r/heatpumps/comments/146jg7k/cold_cli...

> I’ve tested it down to around -5 degrees (f), and it was 100% able to keep the house above 63 degree (f). Some customers will accept that. Most will not. Reddit is not a particularly representative sample of the entire market.

ok, Reddit is not representative. what qualifies you to speak for what customers will accept?

Re: Harnessing America's heat pump moment

#13
post #9

Earlier quoted context omitted.

Cold climate heat pumps have improved a lot, even in the last 10 years. Modern models can maintain comfortable temperatures down to -15F (-26C). Lots of happy customers in this reddit thread: https://www.reddit.com/r/heatpumps/comments/146jg7k/cold_cli...

> I’ve tested it down to around -5 degrees (f), and it was 100% able to keep the house above 63 degree (f). Some customers will accept that. Most will not. Reddit is not a particularly representative sample of the entire market.

63 when it’s -5 out seems totally fine. More than fine for much of the US.

Re: Harnessing America's heat pump moment

#14
post #2

[flagged]

This is outdatated nonsense, I had my system installed 10 years ago and it works down to -15F... even the cheap $1k systems on Amazon work below freezing now Like any piece of equipment, just check the specs before you buy...

It's semi-true even with modern systems and shouldn't be outright dismissed as "nonsense".

A normal person is scared of the prospect of losing heating when it's most needed. -15F accounts for many places in the US, but many others, not so much. Even New Jersey, which we don't think of as the frigid North, can theoretically drop below that number, and nobody wants "almost always" when it comes to life-giving heat in the coldest winter.

Re: Harnessing America's heat pump moment

#15
post #2

[flagged]

The physics of heat pumps disagrees with you. The freezing point of water has no bearing on at what point they become less effective.

Heat pumps lose efficiency as it gets colder. There are no laws of physics which contradict this.

Re: Harnessing America's heat pump moment

#17
post #9

Earlier quoted context omitted.

> I’ve tested it down to around -5 degrees (f), and it was 100% able to keep the house above 63 degree (f). Some customers will accept that. Most will not. Reddit is not a particularly representative sample of the entire market.

ok, Reddit is not representative. what qualifies you to speak for what customers will accept?

I spent 5 years installing and maintaining A/C equipment for residences and a few small commercial locations.

Re: Harnessing America's heat pump moment

#18
post #2

[flagged]

Yep, you get what you pay for. They've started fielding systems that will handle extremes much better, but you dont get that kind of performance without tradeoffs. cascade systems, 200psi r600, 450psi CO2, refrigeration systems are an engineering game irl. They require much more experience to design, setup, and charge correctly. The biggest issue I have with heat pumps for life support heating/cooling, is they have so many single points of failure its scary. Compressors can and will die if anything else in the system goes too far out of the intended cycle. Extreme weather moments or natural disasters can physically break condensors, evaporators, and lines. Electrical surges can and will fry computers, inverters, and controllers. And almost none of those can be serviced on your own.

t. certified

Re: Harnessing America's heat pump moment

#19
post #9

Earlier quoted context omitted.

Cold climate heat pumps have improved a lot, even in the last 10 years. Modern models can maintain comfortable temperatures down to -15F (-26C). Lots of happy customers in this reddit thread: https://www.reddit.com/r/heatpumps/comments/146jg7k/cold_cli...

> I’ve tested it down to around -5 degrees (f), and it was 100% able to keep the house above 63 degree (f). Some customers will accept that. Most will not. Reddit is not a particularly representative sample of the entire market.

If you read just a smidge of the context, it's a sizing issue, not a capability issue.

Re: Harnessing America's heat pump moment

#20

Earlier quoted context omitted.

This is outdatated nonsense, I had my system installed 10 years ago and it works down to -15F... even the cheap $1k systems on Amazon work below freezing now Like any piece of equipment, just check the specs before you buy...

It's semi-true even with modern systems and shouldn't be outright dismissed as "nonsense". A normal person is scared of the prospect of losing heating when it's most needed . -15F accounts for many places in the US, but many others, not so much. Even New Jersey, which we don't think of as the frigid North, can theoretically drop below that number, and nobody wants "almost always" when it comes to life-giving heat in…

I live north of New Jersey by 300 miles and have only used a heat pump for winter heating for 10 years
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