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LG Minisplit Heating data

Kaizen

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Joined
Jan 9, 2015
Messages
6,948
Location
New England
I installed a 3 head LG 32k btu minisplit this summer. With a few assists here I was able to do it from start to finish successfully by myself. While the primary reason was i'm getting to that age i need to smarten up about lifting 12k btu window air conditioners which are the norm in the northeast. Secondary is to use as heat down to a certain temperature to minimize oil fuel use. The problem i had while deciding this was the specs are very hazy from manufacutrers. They give how low it CAN go and still produce heat but not how effeicient it is doing that.
I was very pleased using it solely through october where daytime temps were decent and night was in the 40s this year. But as we got a cold snap below freezing I quicly saw its cheaper to burn the oil.
I puchased a "Sense" panel monitor that plugs into your panel and shows up to the second results of what you are using. It uses its historical database to identify what things are and shows them in bubbles. I havent verified or named things yet as i am only concerned with total power being used.

You can use the wattage and your local energy costs to figure out what minisplit heating would cost you. sorry i couldnt figure out how to make pics smaller.
Reading one. Two heads running shooting for 70 internal temperature in 1000 sq foot space;18k and 12k. It perhaps rams up a couple hundred watts when starting but it was about this amount three times in half hour when i was checking.
temp1a.jpeg
temp1.jpeg

temp1b.jpeg

Second set of data is all 3 heads running 18k,18k,12k in 1600sq ft. It fluxuates from 2500 total watts to 3700s as it cycles. For temps 32 and below it runs at 4200 or more watts all the time and when it was in the 20s although it was keeping the house warm i could hear it inside. Sounded like an airplane.

temp2a.jpeg
temp2.jpeg
temp2b.jpeg
 
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pcmeiners

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Aug 13, 2009
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7,952
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In the only town in Pennsylvania, Bloomsburg.
Not understanding the $. 58 and $.78. Also wattage should be monitored as cumulative watts per hour over a long period of time, not judging average usage. Is $.15 your total electric cost with taxes/surcharges ? You state a 32k unit but you following with a statement 18k, 18k, and 12k, being 48k
 
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fitter30

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Jun 23, 2019
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2,992
Location
Peace Valley,mo
All heat pumps air to air lose btu capacity the colder the outside temp. With both condenser and indoor unit model / serial numbers the tech line at the manufacturers can give u though numbers.
 
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Kaizen

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Jan 9, 2015
Messages
6,948
Location
New England
Not understanding the $. 58 and $.78. Also wattage should be monitored as cumulative watts per hour over a long period of time, not judging average usage. Is $.15 your total electric cost with taxes/surcharges ?
No my rate is 28 cents. Those numbers are just what the app is doing showing costs. I did not speak to that just the watts used so others can apply to their own area. I agree that would be a precise way but that was not my goal here.
 
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Kaizen

Well-known member
Joined
Jan 9, 2015
Messages
6,948
Location
New England
All heat pumps air to air lose btu capacity the colder the outside temp. With both condenser and indoor unit model / serial numbers the tech line at the manufacturers can give u though numbers.
Yes those numbers are available. But for the average guy like me figureing out the btu loss of effeciency and translating that into what it would cost me to run it was difficult.
 
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