This allows the unit to respond to requests from multiple thermostats.
Dual zone ac with one unit.
Your basement or second story will be a rental unit with a tenant who would like control over their thermostat a zoned system is generally more cost effective in terms of both installation and maintenance costs.
Unless you have a reason for having two completely separate systems e g.
You need either two smaller.
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The dampers and thermostats are connected to a central control panel that is also connected to the hvac unit.
But when it comes to zoning central heating and air systems things get trickier.
For pricing and availability.
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The cost of a dual zone system depends on your hvac contractor but a ballpark figure would be around 2 500 3 500 if it is done during an installation depending on the size of your house and your area.
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Purchasing two central air conditioning units can be more expensive initially than purchasing a single unit but the cost difference may not be as much as you think.
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If the thermostat from a particular zone calls for heating or air conditioning the dampers in that zone will open to allow the air to flow into that area.
For more information on how zoning systems work take a look at dual zone air conditioning system.
In a dual unit system you have two totally separate units that each operate a single zone with separate unconnected thermostats.
In summer you only turned on ac window units in rooms where people were sleeping.