How much freon do I need?

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Old 02-12-15, 08:38 AM
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How much freon do I need?

My new 2.5 Goodman heat pump will come precharged with R410, which apparently contains enough for up to a 15ft line set. However, I will need to have the indoor coil (also 2.5 ton) flushed and recharged (currently has R22). About how much freon will it take to charge the system? Two lbs? Three lbs?
 
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Old 02-12-15, 08:45 AM
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Not only will the coil need to be flushed..... the lines will need to be done too.

Your tech should know the approximate amount of refrigerant for the lines and coil.
 
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Old 02-12-15, 10:56 AM
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I'm replacing the lines, and the heat pump comes with enough freon for the new lines (up to 15 ft). I'm trying to get an idea of how much a 2.5 ton evap coil holds so I don't get gouged. I would think any more than 3 lbs and I should be suspicious.
 

Last edited by mossman; 02-12-15 at 01:53 PM.
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Old 02-12-15, 11:16 AM
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I would agree with you on the amount required.
 
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Old 02-16-15, 04:19 PM
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The unit comes pre-charged for 15' of line & a matching indoor coil. No additional refrigerant should be needed for a matching coil.
 
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