Re: Electronically controlled HVAC damper?

["Robert Green" <ROBERT_GREEN1963@xxxxxxxxx>]

> Is it enough to make sure that at least one zone is open? or is it more
complicated?

It depends on the setup.  If you short-cycle a furnace, you run the risk of
cracking the heat exchanger and allowing CO into the house.  It all depends
on the unit's safety features and configurability.  You need to know, at a
minimum, how much the air heats up from furnace air inlet to outlet.  If it
leaves the furnace at say X degrees unmodified but X+30 degrees after your
zoning, you need to do something because you've lowered the over-all airflow
through the system too much.

If you are going to DIY zone, factor in the cost of several good CO
detectors and place them strategically throughout the house.

--
Bobby G.