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SETTING THE DESIRED HUMIDITY LEVEL
The dehumidifier can be set up to control based on dew point or relative humidity (%RH).
DEW POINT CONTROL
The dehumidifier on-board control will display the dryness setting
when not running, and displays the measured humidity when running.
The UP and DOWN arrow buttons allow the dryness setting to be set
from 1 to 7. Use the ON/OFF button to turn the dehumidifier ON or OFF.
Set the control at 3 for initial operation. This setting and corresponding
dew point is recommended for preservation and preventing
condensation on floor joists. Allow the dehumidifier to run until it
reaches the setting before deciding if you want to change the setting.
• If you prefer the air to be more dry, increase the dryness level.
• If you prefer the air to be less dry, decrease the dryness level.
See Table 1 for dryness settings and corresponding dew point (DP).
HUMIDITY CONTROL
The dehumidifier on-board control will display the humidity setting when not running,
and displays the measured humidity when running.
The UP and DOWN arrow buttons allow the humidity level to be set from 40% to 80%
relative humidity. Use the ON/OFF button to turn the dehumidifier ON or OFF.
Set the control at 55%RH when first
installed. Allow the dehumidifier to run
until it reaches the setting before deciding
if you want to change the setting.
• If you prefer the air to be more dry,
decrease the humidity setting.
• If you prefer the air to be less dry,
increase the humidity setting.
Your comfort is the best measure of how to adjust your setting. When first installed,
your dehumidifier has to remove all the moisture that is initially in your home. The home
acts like a sponge so the moisture in the materials of your home is at the same level as
the air. After drying the air, the materials of the home will release moisture back into
the air until they are again at the same level. As a result, it is not uncommon for the
dehumidifier to operate for an extended period when first installed.
TABLE 1 – %RH (+/- 5%) Based on Dryness Setting and
Crawl Space Temperature
Dryness Setting
& Dew Point
1 – Less, 65°F DP
2 – 61°F DP
3 – Normal, 57°F DP
4 – Normal, 53°F DP
90-1853
5 – Normal, 49°F DP
6 – 46°F DP
7 – Most Dry, 42°F DP
EXAMPLE: At a crawl space temperature of 70°F and a dryness level
setting of 3 (57°F DP), the dehumidifier will work to achieve a 63%
relative humidity level.
• The %RH values are +/- 5% and are to be used as a GUIDE ONLY.
• The crawl space temperature is measured at the dehumidifier inlet.
90-1853
Crawl Space Temperature
60°F
65°F
86%
88%
74%
76%
64%
65%
55%
55%
47%
47%
40%
ENERGY SAVINGS TIPS
Energy Savings Tip #1: Adjust the humidity
setting to be as high as is comfortable to
reduce dehumidifier run time. If it feels
clammy or "smells musty", lower the humidity
setting. To save energy, turn the dehumidifier
to OFF when you open your windows, just as
you would with air conditioning.
Energy Savings Tip #2: If vacating your home
for an extended period in the summer, set the
RH at 55% and set your thermostat as high as
you are comfortable setting it to in the cooling
mode. Consult with appropriate professionals
regarding the highest temperature that is safe
for your pets or possessions. This will keep the
humidity at a controlled level while minimizing
the amount of cooling energy used.
70°F
84%
73%
63%
54%
46%
39%
34%
3
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