Quote:
Originally Posted by Dave Lane
Well they are wrong or they are taking a simplistic view in a very small house. Assuming you have plenty of ducts shutting off a room or two that are not being used will not hurt your system. Too little airflow can cause the coil to not get warm enough from the passing air which can be a problem.
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No, it won't necessarily "hurt" the system, my point is that it's not going to make the remaining rooms much cooler, if at all. And you're not really going to save much money by shutting those rooms off.