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You need 350 to 400 cfm per ton (12,000 btu) of cooling. So, divide your cfm by 400. For example, a 1200 cfm blower on an air handler could handler up to 3 tons. All calculations depend on your duct being the proper size for the equipment.

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9y ago
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Petra fahu model pahhc-40
Please Need tonnage

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Q: How do you calculate the tonnage of AHU?
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