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APPLICATION DATA (cont)
15. PERFECT HUMIDITY DEHUMIDIFICATION PACKAGE
FEATURES AND BENEFITS
• The Perfect Humidity dehumidification package can improve
the humidity control of your rooftop equipment by up to 40%.
This greatly reduces the risk of sick building syndrome by
reducing biological growth in both ductwork and the rest of
the building.
• The Perfect Humidity dehumidification package improves
comfort levels in the building by better controlling the humid-
ity. This improved comfort level allows building tenants to
raise the cooling set point on the thermostats for accumu-
lated energy savings.
• Better humidity control lowers the risk of humidity-induced
property damage.
• The Perfect Humidity dehumidification package permits build-
ing refrigerators and freezers to operate more efficiently due
to lower relative humidity levels. This is the perfect solution for
supermarket applications.
• The Perfect Humidity subcooling circuit can be operated by a
humidity sensor. If the sensor is used, the Perfect Humidity
circuit will then only operate when needed. If the humidity lev-
els in the occupied space are acceptable (such as in the
spring and fall seasons), the Perfect Humidity circuit will not
operate. The rooftop unit is then able to operate to its full sen-
sible potential, which provides more efficient performance
and energy savings.
• At lower outdoor temperatures, rooftop units with dehumidifi-
cation devices are subject to low suction pressure conditions.
The Perfect Humidity dehumidification package contains a
low-pressure switch that deactivates the Perfect Humidity
dehumidification package under low suction pressure condi-
tions without deactivating the compressors.
• Improved humidity control allows increased outdoor-air venti-
lation in hot and humid geographical areas. Humidity control
also helps to improve the indoor-air quality of the building.
• The Perfect Humidity dehumidification package is factory
installed. There are no additional field installation costs.
There is also no need to purchase a roof curb from another
manufacturer, as standard Bryant roof curbs will accommo-
date the rooftop units which have the Perfect Humidity dehu-
midification package option installed.
• The Perfect Humidity dehumidification package is engineered
and manufactured by Bryant for Bryant rooftop units. All
application support, service, and warranty issues can there-
fore be handled through one company.
• The slightly lower sensible capacities obtained when using
the Perfect Humidity dehumidification package allow the unit
to operate for an extended period of time. The more the unit
operates, the more air is exposed to the subcooling coil. This
rooftop unit increased latent capacity results in lower relative
humidity levels in the occupied space.
• It is no longer necessary to oversize equipment and add
reheat devices to properly dehumidify your building. In a typi-
cal scenario, a building owner may need 39,000 Btuh of sen-
sible capacity and 23,000 Btuh of latent capacity (62,000 total
Btuh). To accomplish this without the Perfect Humidity dehu-
midification package, a 7
1
/
2
-ton unit with a reheat device
would be necessary to attain the higher latent capacity
required. This results in a large up-front expense to oversize
the equipment from a standard 5-ton to a 7
1
/
2
-ton unit.
The building owner can now purchase a 5-ton unit with the
Perfect Humidity dehumidification package for a small addi-
tional up-front charge, and no reheat device will be necessary
to satisfy the cooling requirements. This reduces both installa-
tion costs and operating costs throughout the life of the
product.