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OfflineMorel Guy
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Registered: 01/23/13
Posts: 15,577
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Larger air conditioner cheaper?
    #24603266 - 09/04/17 01:46 PM (6 years, 4 months ago)

Earlier this year I started using a higher btu ac.  Thought it would send the powerbill thru the roof.  Dead wrong.

Also put in a new window this year upstairs.  Before the only upstairs window was for the ac.

Powerbill peaked at $60 range.  Been using the new window a lot and it realy helps.  Even when the ac was on it didn't have to run 24/7 to not even keep up with the heat.  The old ac could not keep up with the heat, running 24/7.

Maybe I can use the old one downstairs someday.  So far the downstairs stays no warmer than 70.  Insulated the heck out of that room myself.

Wish the natural gas bill would be this low in the winter.  It's a brick house built in '52.  They did not worry so much about heating and colling costs.

I do wonder if a boiler could also be made to cool.  Some sort of boiler that could also work the opposite of heat.  Just circulaing chilled water thru the floor pipes (heated floors in my house) and radiators.


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"in sterquiliniis invenitur in stercore invenitur"

In filth it will be found in dung it will be found


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Invisiblekoraks
Registered: 06/02/03
Posts: 26,670
Re: Larger air conditioner cheaper? [Re: Morel Guy]
    #24604787 - 09/05/17 02:31 AM (6 years, 4 months ago)

Quote:

Morel Guy said:
I do wonder if a boiler could also be made to cool.  Some sort of boiler that could also work the opposite of heat.  Just circulaing chilled water thru the floor pipes (heated floors in my house) and radiators.



There's a couple of problems with this:
* The temperature difference between cool water and the rooms to be cooled would be too small to yield any sufficient cooling capacity using ordinary heating radiators.
* The loop would have to include a heat exchanger for the warmth of the house being dumped to some place cooler. The outside air evidently wouldn't suffice, as it'll generally be just as warm or warmer compared to the indoor temperature on hot days. The only viable option would be to circulate ground water through the heating system. In fact, that would lead you down the road of building a heat pump system with low-temperature radiators and heating/cooling storage.

So either way, you'd basically have to rebuild the entire system, including the active components as well as the radiators.


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OfflineMorel Guy
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Re: Larger air conditioner cheaper? [Re: koraks]
    #24604975 - 09/05/17 06:41 AM (6 years, 4 months ago)

Ya, obviously my system is a long ways from cooling.  It would need several changes like a totally new design.  But ac units dump heat outside.

The new ac works really well for the house.  Surprisingly it is far cheaper.  I did not expect that.


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"in sterquiliniis invenitur in stercore invenitur"

In filth it will be found in dung it will be found


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Invisibletrscstghst
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Registered: 10/14/07
Posts: 786
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Re: Larger air conditioner cheaper? [Re: Morel Guy]
    #24691865 - 10/07/17 06:22 PM (6 years, 3 months ago)

geothermal would accomplish what you are after I believe.  large heat exchanger buried deep in the ground pumping water to all the rooms then back underground again to exchange heat.  you basically just adjust the flow rate.  you don't want your house to be ground temp which is like 52-56*F  some supplemental heating in the winter might be needed if you aren't near a geothermal vent


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Why use up the forests which were centuries in the making and the mines which required ages to lay down, if we can get the equivalent of forest and mineral products in the annual growth of the hemp fields?
o Henry Ford


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OfflineMorel Guy
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Re: Larger air conditioner cheaper? [Re: trscstghst]
    #24694012 - 10/08/17 12:49 PM (6 years, 3 months ago)

I doubt geothermal can be done here in the city


--------------------
"in sterquiliniis invenitur in stercore invenitur"

In filth it will be found in dung it will be found


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Offlineh4dr0n
Registered: 05/16/12
Posts: 71
Last seen: 3 years, 2 months
Re: Larger air conditioner cheaper? [Re: trscstghst]
    #24912882 - 01/14/18 07:56 AM (6 years, 15 days ago)

Quote:

trscstghst said:
geothermal would accomplish what you are after I believe.  large heat exchanger buried deep in the ground pumping water to all the rooms then back underground again to exchange heat.  you basically just adjust the flow rate.  you don't want your house to be ground temp which is like 52-56*F  some supplemental heating in the winter might be needed if you aren't near a geothermal vent




Yeah I’ve read about passive systems like that. Pretty damn expensive from what I hear. But very cool how they work


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