What is the diffrence between cooling and heating ducts v venting. For example 6" round duct in hvac shows at max 125 cfm can it support more cfm ? The venting duct will provide 600 cfm Why such big diffrence venting versus heating cooling.
source https://hvac-talk.com/vbb/threads/2243729-heating-colling-duct-v-venting?goto=newpost
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