@GreggKeenHome How do we explain this --> Click on this LINK ? Do you have any guidelines on how to choose and place automated vents and how to operate them (how many open vs closed at a time), to minimize impact on HVAC performance as described in the link above.? Pasting the article below for easy reading,
How Closed Vents Impact HVAC Performance
Like the idea that cranking the thermostat all the way up or down heats or cools a house quicker, the notion that closing some household vents increases overall HVAC performance and efficiency is a busted myth. In fact, it usually has the opposite effect. In today’s energy-efficient homes, air circulation is balanced to preserve neutral air pressure in each room. When some vents are closed, that delicate balance tips, energy consumption increases and household comfort declines.
Increased Duct Leakage
Even with all vents open, the Department of Energy estimates the average home loses up to 20 percent of heated and cooled air through leaky ducts. However, that percentage climbs even higher when some supply vents are closed. Air pressure inside supply ducts increases in proportion to the number of vents closed and pushes still greater amounts of conditioned air out of existing leaks. Your furnace or A/C runs longer “on” cycles to compensate for the loss, boosting operating costs.
Though the supply register to a room is closed, the return register in that room (which cannot be closed) continues pulling air back to the furnace or A/C. Room air pressure shifts from neutral to negative. A closed, depressurized room continuously sucks unconditioned outdoor air in through small cracks and gaps that exist in any structure. Room temperature becomes acutely cold or hot and transfers to adjoining rooms by conduction through walls, offsetting the air conditioner or furnace and increasing energy consumption.