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Old 08-18-2011, 05:38 PM   #1
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Hi guys. Trying to find the model no for a goodman air handler. I see AR4B on the sticker. My research tells me there is no such model......AR48 would be more like it? Sure its a b though. What makes it even more bizarre is that I dug out the invoice and it says ar18....? I'm screwed if this is the case because I wanted a 4 ton....any help with model numbers?


Last edited by gkaro; 08-18-2011 at 06:02 PM.
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Old 08-18-2011, 06:29 PM   #2
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18 would be 18,000 BTU which would be GROSSLY undersized and would never work with a 4 ton/48 condensor. Most manufacturers use a standard multiple of 6 or 12 in their numbers, ie, 24/36/48 = 2/3/4 ton and all the Goodmans I have seen are following that pattern so I suspect it is a 4 ton. Check the model # of the outdoor unit to be sure. Could also be that it is a 4 ton coil in a B size or they have different cabinet sizes. Lennox has 3 coil sizes A,B, C and they get larger from A to C being the largest. B is a mid sized coil. Reason they have 3 coils is the larger the coil the lower the resistance and pressure drop across it.


"Cut it twice and it is still too short".

Last edited by yuri; 08-18-2011 at 06:32 PM.
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Old 08-18-2011, 06:39 PM   #3
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Thanks yuri. The cond. Is 4ton for sure. I need to get a 5kw heat strip for it and need to make sure I get the right one.
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Old 08-19-2011, 06:54 AM   #4
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How old is the install? Pretty sure all new flavors of Goodman Residential Air Handlers use the HKR series heaters.
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