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Old 06-06-2011, 07:43 AM   #1
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Should I replace dehumidifer?


I have recently taken an old model Hampton Bay dehumidifier out of storage to use in my basement. I have no complaints with its operation. I cannot find a manufacture date on it so I have no idea how old it is, but I'm certain it has far surpassed the life of any unit available for sale today.

Anyways, my brother suggested that I look into a new Energy Star model as it would (presumably) use less energy/cost less to run than the older model I'm currently operating. My argument back is that I have a unit now that works fine now and that any savings I get switching over to the Energy Star model I would have already spent buying it. I'm not the greatest with numbers and am not sure how to calcaulte the cost of running each; I'm hoping someone who is can help me out.

Here are the specs for my old model:
115 v
7.5 Amps
50 pints/day
1.77 l/kwh

And the specs of an Energy Star model I'm looking at:
115 v
4.8 Amps
50 pints/day
540 watts

I'm also considering a 30 pints/day model. Here are those specs:
115 v
3.8 Amps
30 pints/day
390 watts

Given the above specifications, even though my older unit is not Energy Star qualified, how much more energy is it using that one of the newer models? How much, approximately, would I be saving per year buying a new unit? Would the amount I save be more than the cost of the new unit?

Thanks for any and all help you can provide!

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Old 06-06-2011, 05:21 PM   #2
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Should I replace dehumidifer?


1,770 watts per hour for the old one to run and 540 watts per hour for the new one to remove the same amount of moisture. No idea what your electric rate is but lets use 15 cents a KW after delivery as an example.
Old =$6.37 per day or $191.1 a month to operate 24/7
New=$1.95 per day or $58.32 a month to operate 24/7
Cost of a new one $250ish so the electric saving paid for it in less then 2 months .

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ntauctions (06-06-2011)
Old 06-06-2011, 05:47 PM   #3
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Should I replace dehumidifer?


The old model is rated at liters per kilawatt hour. There are something like .47 liters per pint. 50 pints a day by .47 to convert into liters and then multiplied by 1.77 equals 43 kwh a day running at full capacity.

Assuming the new one is l/kwh, you are looking at 12.77 kwh a day for full capacity of the energy star model.

Martys calcs are almost identical. About 2-3 months.

-Dan

Last edited by AfterDinner; 06-06-2011 at 05:52 PM.
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Old 06-06-2011, 08:34 PM   #4
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Should I replace dehumidifer?


Thanks for both your replies; I'm glad that you both came back with the same figures. I ended up purchasing a new dehumidifier tonight after seeing that it could pay for itself in only a couple of months.

Thanks again for your assistance!
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