Lennox Harmony III User manual

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Harmony III™Zoning System
HARMONY III™
Customized comfort
for every corner of
your home

2
Harmony III™Zoning System
The Harmony III Zoning System increases your comfort. As illustrated by the
example above, this innovative system gives you total control over your home
heating and cooling.
Zone 1 – Seldom-used upstairs bedroom (needs little heat or cooling)
Zone 2 – Children’s upstairs bedroom (high heat in the summer requires additional
air conditioning)
Zone 3 – Home office or exercise room
Zone 4 – Family room (high-activity area needs extra air conditioning)
The Harmony III™Zoning System is designed for the many ways you use your
home. Maybe you’re caught up in family “thermostat wars”? Or perhaps there
are parts of your home you rarely use? The Harmony III Zoning System allows
you to divide your home into up to four separate areas, giving you the comfort
and control you’ve always wanted.
THE PERFECT BALANCE OF COMFORT
Working with your heating and cooling system, the Harmony III Zoning
System brings balance to your home environment. By directing airflow only
to desired areas, Harmony III keeps your desired temperatures throughout
your home.
Allows you to customize
your comfort according to
household needs with up to
four zones
Provides optimal comfort
when combined with Lennox’
variable speed furnaces,
two-stage air conditioners,
and heat pumps
Balances airflow throughout
your home, providing even
temperatures
Automatic changeover
between heating and cooling
enhances comfort
Innovation never felt so good.
™
WARRANTY
2-year limited warranty
on covered components.
1
2
3
4

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Harmony III™Zoning System
Features
The Harmony III™Zoning
System delivers the ultimate in
temperature control for the
ultimate in home comfort.
Designed for use with Lennox’
variable speed furnaces, air
handlers, air conditioners, or heat pumps** and digital
thermostat, the Harmony III Zoning System provides
the desired temperature in each zone. The system
includes an easy-to-use control panel, comfort-
enhancing dampers and a duct-mounted sensor that
relays data to the control panel.
Solid-State Control Panel Controls up to four zones in your home Provides desired temperatures and consistent airflow
Discharge Air-Sensor Probe Continually monitors the temperature in the supply airstream Helps prolong the life of the equipment
Digital Thermostats Control temperatures in each zone Precisely regulate heating and cooling temperatures
(one for each zone)
Vacation Mode Defaults to Zone 1 thermostat settings, which controls Maximizes efficiency
the temperature for your entire home while you’re away
Auto Changeover Automatically alternates between heating and cooling Delivers enhanced comfort and peace of mind
during transitional weather
Continuous Fan Allows continuous fan operation by zone Creates better indoor air quality
Feature How It Works How It Helps
Comfortable Provides consistent
air temperatures for exceptional home comfort
The Harmony III Zoning System meets the airflow
requirements of one area, without affecting other areas.
And it works with advanced heating and cooling systems,
so it can regulate temperature to as little as one degree*
of the thermostat setting.
Flexible Divides your home into up to
four different zones
The Harmony III system lets you increase, reduce or shut
off heating or cooling in each zone to match the needs
of your household.
Quiet Increases your comfort, without
increasing sound levels
The Harmony III system allows your Lennox®HVAC
equipment to deliver peak performance without
continually operating at peak capacity. Lower speeds
mean lower sound levels.
*Depending on the brand of digital thermostat.
**System provides stand-alone dual-fuel capability.

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PC52672(83M77) HIII 2/08
© Lennox Industries Inc. 2008
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.
1Air conditioner or heat pump
2Thermostat
3Furnace or air handler
4Filtration device
5Germicidal light
6Indoor coil
7Humidifier
8HEPA bypass filtration system
9 Energy recovery ventilator
 Supply duct
 Return duct
 Dehumidification system
 Residential generators
CUSTOMIZE YOUR COMFORT
Lennox®heating, cooling and indoor air quality products are designed to
provide efficient, economical comfort—not only as individual units, but also
together as an integrated system. This combined network of products delivers
on every comfort count, from consistent temperatures and balanced humidity to improved indoor air quality. Lennox also
offers a line of residential generators, which provide safe, reliable standby power in the event of outages.
DEALERS YOU CAN COUNT ON
Choosing the right dealer for your home’s heating, cooling and air quality needs is every bit as important as choosing the
right brand. We think you’ll agree our independent dealers are a big reason you can count on quality customer service
whenever you call. Your Lennox dealer’s dedication to quality shows in his knowledge, training and expertise in designing
the right system for your home, installing it properly and keeping it running perfectly for many years to come.