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Total Comfort Systems Blowers Should Run Constantly!
In the Total Comfort System, the blower should run constantly -- all the time -- it should never shut off. Supply outlets are sized and located so that the discharging air stream should not strike a person directly.
In many ducted forced warm air systems, blowers are adjusted to run intermittently, only when the heating and cooling element is on. This is ineffective in any ducted air handling system. It should never happen in the Total Comfort System.
When a blower runs intermittently -- on and off -- as frequently as the heating element starts and stops, you will first get a blast of hot air and then everything will shut off. Floors will get cold/hot and room temperatures will become unbalanced. Basement or lower level rooms cool rapidly and upstairs rooms are apt to overheat. No ducted air handling system can produce total indoor comfort unless the blower runs all the time.
In most well-engineered, big commercial ducted central air handling systems, you will usually find that the blowers run constantly. There are sound reasons for this.
Cleansed, conditioned air moves through the duct system when -- and only when -- the blower is operating. As this air enters the rooms through the perimeter diffusers, it draws room air into the supply air stream, setting all the air in the room into gentle, even motion. You would not sense this movement of the room air in terms of its motion; rather you will sense that the air surrounding you is constantly renewed and that the atmosphere is pleasing and fresh. If the air is not moving, you may soon feel that the air seems to "hang heavily" around you and that the atmosphere is oppressive.
Note: While in most instances it is recommended that the blower runs constantly, in some geographical areas, where humidity is a problem, running the blower constantly could lead to more humidity and the problems that could result from it. Consult your local Total Comfort System contractor to determine what is best for your local environment.
