Home gas furnace .. I do not want no more

[Richard]

A distribution system (ducting) is designed to flow the amount of air the furnace or air handler is designed to output. In my years I have found most are slightly undersized for various reasons. Any time you shut a vent down the air tries to go somewhere else. If the distribution system is already maxed out airflow is reduced when shutting off a vent, not redistributed. The compressor is under higher load, A/C system may freeze up, temp rise is higher on the heat side. System is operating near the safety shutoff levels. A slightly dirty filter may cause a shutdown. Many operate for years not even knowing the system is short cycling or shutting down on the temp limit. Basically, I am saying if you have 10 vents and shut of no more than two you may not have problems. Now shut off five of the ten and there will be problems. The air needs somewhere to go for the system to operate properly. You have been okay, shutting off two smaller vents and the system could tolerate that. Reducing airflow can result in improper operation, higher energy costs and failure. What would driving around with the ebrake applied do to your car? Hope I did not ramble to much. Feel free to pm me for my cell # if you want any more input.
Richard