How Are Zones Determined - Lennox Harmony III Homeowner's Manual

How are zones determined?

Your Lennox dealer has sectioned the rooms of your home or
building into zones using the following considerations:
1. Structural and Architectural Considerations In multi-level
houses using regular HVAC systems, heated air rises to the
upper floor(s) causing those rooms become too hot. Zoning
will remedy this situation by splitting the conditioned space
into two specific zones (1st and 2nd floors). The 2nd floor
temperature is now controlled by its own thermostat, not that
of the 1st floor.
2. Climate Considerations Exposure from the sun and weath-
er can produce cold and hot spots in homes that are condi-
tioned with the use of one thermostat. Zoning lessens this by
grouping rooms with the same exposure into one zone.
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Therefore, rooms with a northern exposure and rooms with
a southern exposure should not be zoned together. In the
winter, northern rooms may be too cool while southern rooms
may be too hot. In order to keep a balance of conditioned air,
the zone must contain rooms with the same weather expo-
sure.
3. Occupancy Considerations A single structure contains dif-
ferent types of living spaces. Without zoning, it is difficult to
condition all areas so that everyone will be comfortable. Zon-
ing a home or office allows the owner to control the zones
which need to be conditioned. Rooms that are used or occu-
pied at the same time are zoned together. Bedrooms which
are generally used at night, should not zoned with a living
room that is used only during the day or evening.
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