AC Operation Requires Heat
The conditioned space will not have
sufficient moisture removal if the result
of air conditioning system operation is
not frequent enough or for long enough
durations to control moisture,
coincidental to indoor air temperature
control. If there is no heat load and an
air conditioning system is forced to run
anyway ; temperatures will drop
continuously until freeze-up occurs or
on some systems until shut down
occurs on systems with integral
freeze-up safety controls.
Over Cooling with Air Conditioning
Attempting to improve humidity control
by over-cooling a building can cause
additional indoor moisture problems.
Moisture migrates more rapidly through
building materials toward lower
temperatures wetting the materials
faster. Condensation occurs on
airhandler cabinets, ductwork other
components that are over-chilled by
the air inside them. The cold damp
indoor environment created
encourages microbial growth
in the air and on
indoor surfaces.
The conditioned space will not have
sufficient moisture removal if the result
of air conditioning system operation is
not frequent enough or for long enough
durations to control moisture,
coincidental to indoor air temperature
control. If there is no heat load and an
air conditioning system is forced to run
anyway ; temperatures will drop
continuously until freeze-up occurs or
on some systems until shut down
occurs on systems with integral
freeze-up safety controls.
Over Cooling with Air Conditioning
Attempting to improve humidity control
by over-cooling a building can cause
additional indoor moisture problems.
Moisture migrates more rapidly through
building materials toward lower
temperatures wetting the materials
faster. Condensation occurs on
airhandler cabinets, ductwork other
components that are over-chilled by
the air inside them. The cold damp
indoor environment created
encourages microbial growth
in the air and on
indoor surfaces.
Stand-Alone Dehumidifiers
Simple dehumidifiers can be used to
control relative humidity in conditioned
spaces. A humidistat commands DH
operation according to indoor relative
humidity level regardless of indoor
temperature. Dehumidifiers do not cool
the space like air conditioning systems.
Dehumidifiers have a cooling coil to chill
air below its dewpoint condensing
water vapor. A second "Reheat" coil
warms the air leaving the cooling coil
before it discharges into the space.
It can continue operating continuously
without ever overcooling the space.
Stand-Alone Dehumidifier
substituting for AC operation
Simple dehumidifiers located in the
same space served by a central AC
system can substitute for AC operation
during unoccupied periods when used
to control humidity without the need to
keep indoor temperature levels low as
well. The air conditioning system
is left in the "Off" mode while the
indoor humidity is being controlled
directly by the humidistat.
Advanced Thermostat / Humidity
Integrated Control Systems
Advanced Digital Controls can operate
air conditioning and dehumidification
equipment in concert with each other.
From a single wall mounted digital
interface screen, the user can select
both indoor temperature and
the relative humidity.
The user specified temperature is
satisfied by shutting off the dehumidifier
while the air conditioning is running,
and enabling dehumidifier operation
only after the desired indoor temperature
is achieved. Once the indoor temperature
setting is satisfied, the dehumidifier will
come on and run if the relative humidity
is still higher than specified after cooling.
This is the only configuration that offers
precise temperature and relative
humidity control regardless of heat load.
The continuous temperature and
relative humidity display on the
thermostat screen report
all indoor conditions.
Simple dehumidifiers can be used to
control relative humidity in conditioned
spaces. A humidistat commands DH
operation according to indoor relative
humidity level regardless of indoor
temperature. Dehumidifiers do not cool
the space like air conditioning systems.
Dehumidifiers have a cooling coil to chill
air below its dewpoint condensing
water vapor. A second "Reheat" coil
warms the air leaving the cooling coil
before it discharges into the space.
It can continue operating continuously
without ever overcooling the space.
Stand-Alone Dehumidifier
substituting for AC operation
Simple dehumidifiers located in the
same space served by a central AC
system can substitute for AC operation
during unoccupied periods when used
to control humidity without the need to
keep indoor temperature levels low as
well. The air conditioning system
is left in the "Off" mode while the
indoor humidity is being controlled
directly by the humidistat.
Advanced Thermostat / Humidity
Integrated Control Systems
Advanced Digital Controls can operate
air conditioning and dehumidification
equipment in concert with each other.
From a single wall mounted digital
interface screen, the user can select
both indoor temperature and
the relative humidity.
The user specified temperature is
satisfied by shutting off the dehumidifier
while the air conditioning is running,
and enabling dehumidifier operation
only after the desired indoor temperature
is achieved. Once the indoor temperature
setting is satisfied, the dehumidifier will
come on and run if the relative humidity
is still higher than specified after cooling.
This is the only configuration that offers
precise temperature and relative
humidity control regardless of heat load.
The continuous temperature and
relative humidity display on the
thermostat screen report
all indoor conditions.
Naples Air Conditioning
Products and Services
Products and Services
State License CMC041066
 | |  | |  | |  | |  | |  |
Humidity Control with AC Equipment
Heat from the sun warming building
components, along with indoor heat
from lighting and appliances are normal
Heat Load Sources that raise the indoor
air temperature above the T-Stat setpoint
initiating a cooling cycle.
The air conditioning system removes
airborne moisture as it lowers the air
temperature. Any time the air conditioner
is running moisture is being removed
and the indoor air temperature is
dropping simultaneously.
Coincidental Humidity Control
Humidity Control using conventional
AC equipment is the coincidental result
of a continuous heat load source
creating an AC demand to run a cooling
cycle and lower the indoor air
temperature. Heat is required to use air
conditioning. If no heat is present the
thermostat will not operate
a cooling cycle.
Heat from the sun warming building
components, along with indoor heat
from lighting and appliances are normal
Heat Load Sources that raise the indoor
air temperature above the T-Stat setpoint
initiating a cooling cycle.
The air conditioning system removes
airborne moisture as it lowers the air
temperature. Any time the air conditioner
is running moisture is being removed
and the indoor air temperature is
dropping simultaneously.
Coincidental Humidity Control
Humidity Control using conventional
AC equipment is the coincidental result
of a continuous heat load source
creating an AC demand to run a cooling
cycle and lower the indoor air
temperature. Heat is required to use air
conditioning. If no heat is present the
thermostat will not operate
a cooling cycle.
Humidity Control Using Air Conditioning System