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trying to install a heat pump

trying to install a heat pump

Old Sep 15th 2022, 7:11 pm
  #16  
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Default Re: trying to install a heat pump

Originally Posted by barlaventoexpert View Post
have you spoken to FF Solar in the Aljezur/Rogil Industrial Park.

Yes, I have spoken to FF solar several times over the years, and I talked to them about this as well.
They have great material and experience, but terrible prices.
And every time I go there, the sales people tell me lies. The lies they told my would probably not be noticed by most people, but I'm a technical person and I do my research.
The last time, it was about solar system batteries. The sales lady told me enthusiastically that a battery would pay for itself in 8 years.
I called her on it; "That's not true is it?"
"No." she admitted.

So even though they're just a few km from me, I'm looking for someone else.
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Old Sep 15th 2022, 7:13 pm
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Default Re: trying to install a heat pump

Originally Posted by petitefrancaise View Post
I'm in Texas and I have 2 heat pumps for airconditioning/heating and the noise is barely noticeable as Pulaski says. I installed these 4 years ago. Great investments for me as they cut my air con bill by 50% from previous units ( not heat pumps) installed in 2009 by previous owners.

So actually, a heat pump is a reversible air conditioner.
When used as an air conditioner, it's an air conditioner. The new ones are more efficient than the old ones, but the principles of operation are exactly the same.

If you saved money, that's a good thing.
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Old Sep 15th 2022, 9:45 pm
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Default Re: trying to install a heat pump

Originally Posted by macliam View Post
the quality of advice/work - is dependent on where you are. So whilst I really think heat pumps are the way forward (I first had experience of them in the 1970s), I think the market needs to "evolve" before it becomes an off-the-shelf solution. Believe me, I wish it were otherwise........

If you have the technical experience to assess, design, fit and maintain the system, OK...... otherwise you are hostage to fortune.

Back to square 1, yes; what we need is good objective advice. And that's a problem when the advice person is also the installation and sales person.
This is why I prefer to do everything myself; even though I'm not as knowledgeable as the professional installers, I know who I'm working for.

And once I'm into it all, I will be pretty good at solving any problems that arise.



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Old Sep 15th 2022, 10:02 pm
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Default Re: trying to install a heat pump

Originally Posted by liveaboard View Post
So actually, a heat pump is a reversible air conditioner.
When used as an air conditioner, it's an air conditioner. The new ones are more efficient than the old ones, but the principles of operation are exactly the same.

If you saved money, that's a good thing.
That's how I got to know about them...... back in the 70s an ex-apprentice to my da had become a refrigeration engineer. He built a new home and also built and installed a water-source heat-pump, because it was, at heart, a reverse fridge (and hence a reversed air-conditioner). However, reversed does not mean the same as reversible and I am always a little dubious about the reversible air conditioner as a form of heating (although it's a great idea). I have not gone into it, but it seems likely that such a unit, while flexible, is probably slightly less efficient than a dedicated air-conditioning unit and also slightly less efficient than a dedicated heat-pump for heating. However, that's relative and probably overcome by its flexibility and the advances in design and manufacture. Likewise, the term "heat-pump" is being used in other ways these days .... for example the heat-pump tumble drier descries the closed-loop re-use of already heated air, rather than the generation of heat (although this system also saves energy and costs).

However, whatever the use of technology, anything that can efficiently produce more than one Kw of heat or cooling per Kw of input electricity is a winner.... given that electricity is easily available at a good price. It then comes down to the cost of purchase and installation versus alternatives.... plus any other "negatives" that may apply. It also solves one of my other bugbears.... energy storage, as heat stored as hot water in a well-insilated unit is a good storage solution too. So it is quite possible that a reversible heat-pump could outperform an older dedicated unit and best not to get hung up on relative efficiency.
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