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Read our privacy policyRafters should generally be a little wider than 20". The narrowest 5 ton air handler has a depth of 21". Despite this difference, most people are able to fit 21" wide air handlers and furnaces between their rafters. Your best bet would be to double check the measurements for your rafters and compare them to the air handlers.
If you have any further questions, please call us and we will be happy to assist you.