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Here are six common sense rules we teach our people that will
make designing systems a breeze. When you design a zoned system
you should follow these guidelines as much as possible when grouping
rooms together to form a zone:
1) Never combine different floors on the same zone. The fact
that hot air rises, and cold air falls will sink you before you
even begin. As everyone knows, there’s nothing worse than a customer
with a hot head or cold feet!
2) Never zone rooms of different construction types in the same
zone. For an example, a new addition should always have it’s own
thermostat since it t typically has better insulation than the
rest of the home, and it will react differently than older sections
of the home.
3) Never zone rooms that have perimeter wall areas with rooms
that are entirely internal to the structure since they are not
affected by the outside temperature changes. All internal rooms
should be grouped together whenever possible.
4) All thermostats should be located in the room used the most
in any area. Just like with non-zoned systems thermostats should
never be installed in hallways, unless the customer plans on doing
most of his living there.
5) Never put rooms with conflicting solar or mechanically generated
heat loads on the same zone. For example don’t put a east facing
room that receives a heavy morning sun load onto the same zone
as a western facing room.
6) Always try to have a minimum of two registers for any one
zone. This keeps the air flow more stable, and guarantees airflow
when the customers dog decides to nap on top of one.
You may not be able to follow every rule, but if you at least
take them into consideration when you design a system you’ll avoid
a lot of trouble.
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