In general, can you tell me what the CFM of air should be for a furnace coming out of a vent?

Thank you!

Not really. There is basically no set standard since it depends upon the blower hp, size of duct, length of duct, grill type for a deduction of air flow etc. Sorry but that is just the way it works in this business.

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Originally Posted by RustBucket

In general, can you tell me what the CFM of air should be for a furnace comming out of a vent?

Thank you!

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Thanks for the response... can you give me a range? Surely there must be a standard for a given size room? I would think the larger the room the more CFM needed?

I have a 3 ton 1200CFM blower furnace that I am working on.

Here is a 40 year old chart. Every thing else here is electronic programing that needs a complete set of parameters which you do not have.