
Product Bulletin
Humidity Sensor and Fan Control
Automatically Turns
On Ventilation Fan
to Reduce Condensation
The Leviton Humidity Sensor and Fan
Control automatically detects excess
humidity in a room and activates the
ventilation fan to lessen condensation
which helps reduce mold and mildew.
The sensor uses a microprocessor combined with state-of-the-art digital sensing
technology to continuously monitor and
manage humidity levels in areas of the
home prone to condensation and mildew.
It features user-friendly controls to adjust
sensitivity, humidity level and time out
settings. The sensor can replace a single
pole switch and can be used with most
bathroom or ventilation fans or fan/light
combinations. It is designed to fit within
a standard wallbox and requires a neutral
wire for operation.
Applications
Contemporary in design, the Humidity
Sensor and Fan Control is the ideal
solution for controlling ventilation in areas
of high humidity, dampness or rooms prone
to condensation and mildew such as:
- Bathrooms
- Basements
- Laundry Rooms
- Home Spas
The sensor also helps reduce energy usage
by automatically operating the fan only
when needed to control excess humidity.
General Operation
Automatic Humidity Control Mode – The
sensor will automatically turn the fan
ON upon detecting excess humidity.
The sensor will continue to monitor the
ambient air and automatically turn the fan
OFF when the humidity level has dropped.
Manual Operation – For immediate
ventilation needs, the user can manually
switch the fan ON or OFF by pressing the
fan icon. The fan will run for 10 minutes and
automatically turn OFF (time out period can
be adjusted). If humidity levels change, the
sensor will shift into automatic mode and
time out accordingly.
Air Cycle Mode – The Air Cycle mode
automatically turns ON a ventilation fan for
a set period of time and repeats the cycle
hourly (eg. 20 minutes ON/40 minutes
OFF each hour). This feature may be used
in areas requiring periodic ventilation on a
continuous basis such as basements, spas
or public restrooms.

Features and Benefits
General
- Replaces a single pole switch for control of a ventilation fan
or a fan/light combination
- Neutral wire is required for operation
- Microprocessor control with digital sensing technology
- Can be used to comply with the requirements of 2019 California Title 24,
Part 6, Indoor Air Quality and Mechanical Ventilation
- Can be used to comply with the requirements of 2019 CALGREEN, Part II,
Indoor Air Quality and Exhaust
- Automatic Ventilation/Air Cycle mode for continuous operation
with hourly pre-set time outs
- Green LED functions as a status indicator (Fan ON/OFF, Air Cycle mode,
Manual Override)
- Compatible with Incandescent, LED, CFL and Fluorescent lighting loads
- Use with existing or new ventilation fans up to 1/6 HP, 3 Amp
- Screw terminals for easy installation
- Compatible with Decora® and Decora PlusTM wallplates
- Available in White, Ivory and Light Almond. Color change kits available
Automatic Fan Control
- The sensor automatically detects excess humidity and activates
a ventilation fan for control of excess condensation*
- Built-in timer sets the “minimum ON time” for the ventilation fan.
The sensor timer settings can be custom set to 10, 20, 30 or 45 minute
intervals
- The sensor will continue to operate the fan for the minimum set time
or until there is a reduction in room humidity level. This greatly reduces the
chance of condensation developing
- Sensitivity level adjustment allows the user to adjust the sensitivity
level of the sensor to prevent false cycling
Manual Fan Control
- The device can be manually turned on by pressing
the fan icon to address immediate ventilation needs.
The fan will turn OFF automatically after 10 minutes
or the set time out
* The Leviton Humidity Sensor and Fan Control will not
independently eliminate condensation. It must be used with a
properly sized and rated ventilation fan in an enclosed space.
Ratings
- 120VAC, 60Hz, Single Pole
- 600W Incandescent
- 150W LED, CFL
- 1/6 HP, (3A) Fan
- 400VA MLV/Fluorescent
Agency Standards and Compliance
- cULus
- Standards UL 873 and C22.2 No. 24
- File No. E79658
- Can be used to comply with the requirements of 2019
California Title 24, Part 6, Indoor Air Quality and
Mechanical Ventilation
- Can be used to comply with the requirements of 2019
CALGREEN, Part II, Indoor Air Quality and Exhaust
- Meets requirements of ASHRAE 62.2
Installation Recommendations for Bath Fan Control
- It is recommended that in large spaces the IPHS5 Humidity Sensor
and Fan Control be placed within close proximity to the shower/
tub (steam/vapor source) to most eectively measure/monitor for
excess humidity
- Ceiling heights in excess of 8 feet may aect the sensors’ ability
to properly detect shower/tub steam
- The sensor requires a closed room to properly operate.
Opening a door during operation may temporarily interrupt
the operating cycle
- Changes in season may aect operation of the sensor due
to ambient air temperature and humidity. Please review the
sensor instructions for sensitivity and humidity adjustment
if required

Dimensional Drawing
1.75
44.5
1.22
30.9
Wiring Diagram
Black
White
0.37
9.3
RD
4.13
104.8
3.81
96.8
BKWH
3.28
83.3
Green
Ground
Hot (Black)
Line
120 VAC, 60Hz
2.72
69
User Adjustable Settings
1 SENSITIVITY Adjust low, medium or high the sensitivity to ambient humidity changes
2 TIME Adjust the minimum ON time of fan
3 HUMIDISTAT Turn ON the air cycle or adjust the humidity set points
Cat. No. IPHS5
Md
Lo
Hi
f
of
80
cycle
20
3
off
2
4
1
Neutral (White)
Required For Operation
Sensitivity
1
Lo Md
Off
2 3
Time Humidistat
(20 min.) (30 min.)
2 3
1 4
(10 min.) (45 min.)
(Stop Mark)
Hi
20 80
Off
cycle

Ordering Information
Description Rating (120VAC) Cat. No. Color
Humidity Sensor and Fan Control
600W Incandescent
150W LED/CFL
400VA MLV/Fluorescent
1/6 HP (3A) Fan
Humidity Sensor and Fan Control
600W Incandescent
150W LED/CFL
400VA MLV/Fluorescent
1/6 HP (3A) Fan
Humidity Sensor and Fan Control
600W Incandescent
150W LED/CFL
400VA MLV/Fluorescent
1/6 HP (3A) Fan
Color Change Kit, No Fan Icon N/A IPDKT-00 W, I, T, E, B
Color change kits available in the following colors: White (-W), Ivory (-I), Light Almond (-T), Black (-E), Brown (-B)
IPHS5-1LW White
IPHS5-1LI Ivory
IPHS5-1LT Light Almond
Leviton Manufacturing Co., Inc.
201 North Service Road, Melville, NY 11747-3138
Telephone: 1-800-323-8920 • FAX: 1-800-832-9538
Tech Line: 1-800-824-3005
Mon-Fri 8am-10pm EST, Saturday 9am-7pm EST
Visit our Website at: www.leviton.com
© 2020 Leviton Manufacturing Co., Inc. All rights reserved.
G-9059B/K19-dp