2-Stage Heating, 2-Stage Cooling Thermostat for Gas Heating/Electric Units (Lennox)
(Temperature and Humidity Control)
Comfort Made Easy Menu Driven Display
2 Heat / 2 Cool
Complete Temperature and Humidification / Dehumidification Control
•ve combined humidity and temperature control in one
easy-to-install, easy-to-program package.
This versatile thermostat provides control over both humidification and dehumidification. Your
customers will enjoy the maximum comfort and energy savings, and
you will benefit from the time and effort saved by installing a single
device that does the work of two.
Our 81M28 thermostat combines all the award winning features of our
81M28 series thermostats with the convenience of humidity control.
When used in conjunction with our 9025i outdoor sensor, the 9870i
minimizes condensation and maintains optimal comfort.
•ve even added a calibration feature to fine tune the thermostat to the
individual's unique environment.
The 81M28 is compatible with most standard 24 Volt AC heat pump
systems, up to two stage heat and two stage cool. We took the guess
work out and put simplicity in. It
•s programming made easy.
Integrated Humidity Sensing
• Automatically adjusts indoor
humidity levels, prevents condensation and maintains desired
Worry-Free Memory Storage
• Even during power outages, the
thermostat maintains setpoint and programmed parameters.
• 7 day, 5/2, 5/1/1 or 24 hour programming menus.
Adjustable Events Per Day
• 2, 4 or 6 events per day for greater
control of your customer
High/Low Balance Point Control
• When connected to the outdoor
sensor, model 9025i, the thermostat can automatically control first
and second stage activities with adjustable set points.
Selectable 2nd Stage Heating (Fossil Fuel Kit)
• Choose internal
auxiliary or a remote heating system.
Adjustable 1st and 2nd Stage Differential
• Maintains optimal
Adjustable Timed Upstaging
• Helps maintain optimal temperature
or energy savings.
Remote Indoor and Outdoor Sensor Capable
• For greater control of
indoor comfort and system efficiency.
EERTM (Energy Efficient Recovery)
• Increases energy savings. EERTM
allows gradual recovery from setback temperature to minimize use of
Electrical rating: 24 Volt AC (18-30 VAC)
1 amp maximum load per terminal (relay outputs)
4 amp total maximum load (all terminals combined)
Temperature control range: 45
Power Source: 24 VAC
Auto Changeover deadband: Selectable 2
• to 8
Temporary temperature override: 3 hour maximum or next setpoint
Remote sensor capable: 1 indoor and 1 outdoor sensor
System configurations: Multi-stage heat pumps
Terminations: R, E, Y1, B, W2, Y2, L, O, G, C, IS, OS, H
Replaces Lennox Part Numbers:
Used with Lennox Equipment Models: