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Old 06-19-2016, 04:46 PM   #1
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Energy Efficiency of Baseboards VS A/C Unit


Hey guys,

I am shopping for air conditioners for through-the-wall units. Some of them have heat. My home currently uses baseboard heat which is really expensive.

Does anyone know what the relative efficiency of baseboard heat vs the heating in one of these A/C units? If its not any better I'd rather not spend the extra money, but it would be nice to have a cheaper heat medium if it is better.

Here is the unit I'm considering:

http://www.lg.com/us/air-conditioners/lg-LT1236HNR

-Jeff

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Old 06-19-2016, 06:15 PM   #2
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Re: Energy Efficiency of Baseboards VS A/C Unit


That's plain old electric heat strips. Not efficient at all. But you could get more heat out of an electric heater with a fan. They put out 1500 watts. More than what the ac/heater combo would

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Old 06-19-2016, 06:28 PM   #3
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Re: Energy Efficiency of Baseboards VS A/C Unit


So.... is it more efficient or less efficient than baseboard heaters?
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Old 06-19-2016, 07:03 PM   #4
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I hate to sound confusing but it depends on the cost of fuel. Generally electric is higher, I have no idea of your cost but I would think that the heat strips would be a higher cost
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Old 06-19-2016, 07:10 PM   #5
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Re: Energy Efficiency of Baseboards VS A/C Unit


First, improved efficiency would come from improving your home insulation and air sealing. Then, if you want a combination of ac and heat, look into a heat pump, which uses electricity, but delivers either heating or cooling at a much lower cost. If you have multiple rooms, then look at a mini-split system.

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Old 06-19-2016, 07:13 PM   #6
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Re: Energy Efficiency of Baseboards VS A/C Unit


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Originally Posted by BayouRunner View Post
I hate to sound confusing but it depends on the cost of fuel. Generally electric is higher, I have no idea of your cost but I would think that the heat strips would be a higher cost
Yes, you are confusing us. All electric resistive heaters have the same efficiency --- 100%. That is to say that 100% of the electricity that you put into it turns into heat. A fan will just distribute the heat throughout the room better. A mini-split (heat pump) has higher efficiency because it is not a resistive heater, it pumps the heat from outside into your home.
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Old 06-19-2016, 07:20 PM   #7
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Re: Energy Efficiency of Baseboards VS A/C Unit


I assume that this thing: http://www.lg.com/us/air-conditioners/lg-LT1236HNR

is not a heat pump.. correct?
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Old 06-19-2016, 07:24 PM   #8
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Re: Energy Efficiency of Baseboards VS A/C Unit


No, that is just an air conditioner. The heat function is just resistive heat strips.

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Old 06-19-2016, 07:27 PM   #9
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What kind of baseboard heat to you have? Gas fired boiler? Oil fired boiler ? Electric boiler? or are they electric resistive ?
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Old 06-19-2016, 07:33 PM   #10
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Re: Energy Efficiency of Baseboards VS A/C Unit


OK, sorry Bayou. I assumed the OP meant he has electric baseboard heat, but I guess that has not been established yet.
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Old 06-19-2016, 09:07 PM   #11
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Re: Energy Efficiency of Baseboards VS A/C Unit


I have electric baseboard
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Old 06-19-2016, 09:20 PM   #12
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Re: Energy Efficiency of Baseboards VS A/C Unit


Jeff,
My apology if I missed it, but approximately where are you, climate zone.
Also, do you own, rent, and is this a condo, row house, or single residence?

With electric heat you have an opportunity to reduce both heating costs and air conditioning cost with a heat pump. They use an outside unit to extract or discharge heat to provide either heating or cooling. Think half price on your electric bill, depending somewhat upon what other electric uses you have.

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Old 06-19-2016, 09:21 PM   #13
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The efficiency of electric resistive heat is 100 percent whether they are heat strips on a window air container or a baseboard. A given number of BTUs will cost you the same. I would look at heat pump/ac unit . That will be cheaper to run
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Old 06-19-2016, 09:22 PM   #14
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Re: Energy Efficiency of Baseboards VS A/C Unit


Then that thing isn't going to change your heating bill. It makes heat exactly same way as your baseboards.
1 Watt = 3.4 BTU/hr --- so if you do the math to the spec sheet, that unit is just converting the electricity into heat.
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Old 06-19-2016, 09:42 PM   #15
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Re: Energy Efficiency of Baseboards VS A/C Unit


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Originally Posted by SPS-1 View Post
OK, sorry Bayou. I assumed the OP meant he has electric baseboard heat, but I guess that has not been established yet.
No problem and I agree. The window unit with electric heat is not going to save anything. If it's one room you are trying to heat/cool a mini split would be a good option as well

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