The Golden Rules of Designing a Zoned System
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,
thereís 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 itís 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
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
donít put a east facing room that receives a heavy
morning sun load onto the same zone as a western
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 youíll avoid a lot of trouble.