
15GCSX Residential Packaged Gas/Electric Unit
Home Comfort Systems
15GCSX
Remarkably efficient comfort

Dave Lennox Signature® Collection
15GCSX Packaged Gas/Electric Unit
Sleek, newly designed
™
cabinet allows easy
installation in almost any
residential setting
Enhanced performance
and reliability
Two-stage heating and
variable speed blower
operation provide greater
efficiency and improved
indoor air quality
High cooling efficiency can
significantly reduce your
energy bills and also make
you eligible for utility rebates*
Unique, Indoor Air Quality
(IAQ)–ready design provides
the option for fresher, cleaner
indoor air
Innovation never felt so good.
Ozone-responsible R410A
refrigerant meets the
EPA’s (Environmental
Protection Agency) most
stringent guidelines
Comfort is something we all want in our lives and home environments.
Lennox’ 15GCSX packaged unit provides exceptional comfort with
two-stage heating and variable speed blower operation,
minimizing the up-and-down temperature changes
associated with standard units.
EXCEPTIONAL COMFORT. MONEY-SAVING EFFICIENCY.
ALL IN ONE SLEEK, STREAMLINED PACKAGE.
The 15GCSX increases your comfort, while reducing your energy costs.
Designed with the finest features available, the 15GCSX takes comfort
technology to new heights, so your utility bills can reach new lows. You
gain comfort and save money—season after season, year after year.
Lennox® System Operations
Monitor continuously reviews
system performance for
added peace of mind and
faster servicing
ENERGY STAR® qualified*
EFFICIENCY RATING
Up to 15.00 SEER (Seasonal
Energy Efficiency Ratio) and
78% AFUE (Annual Fuel
Utilization Efficiency).
WARRANTY**
20-year limited warranty
on the heat exchanger.
10-year limited warranty
on the compressor.
5-year limited warranty on
covered components.
2
VARIABLE SPEED OPERATION
Full Capacity
Gradual
Gradual
Deceleration
Acceleration
Humidity
Control
Added
Efficiency
Off
Gradual acceleration and deceleration of the variable speed motor
significantly reduce sound.
Less noise. Less humidity. More comfort.
* Your new packaged unit may qualify for local utility rebates or state tax credits. Call the utility
company in your area for more information about any incentives available for ENERGY STAR®
qualified heating and cooling equipment.
**Applies to residential applications only. See actual warranty certificate for details.

OUTSTANDING FEATURES FOR EXCEPTIONAL COMFORT, YEAR AFTER YEAR
Dave Lennox Signature® Collection 15GCSX Packaged Gas/Electric Unit Specifications
Tubular Heat Exchanger –
Provides excellent heat transfer and
superior airflow control for years of
efficient, reliable operation.
Internally Mounted Outdoor
– Significantly reduces operating
Fan
sound (vibrations) and allows
easier servicing.
Dependable Scroll Compressor –
Provides reliable and efficient
operation.
Two-Stage Heating –
Runs at low-stage heat most of
the time, providing high-efficiency
15GCSX
Up to 15.00 SEER
and 78% AFUE
performance.
Easy-Access Control Panel –
Allows faster servicing.
Variable Speed Blower Motor –
IAQ-Ready Design – Can be easily
equipped with an internally mounted
Precisely controls the flow of heated
and cooled air for improved comfort.
PureAir™ Air Purification System for
improved indoor air quality.
PureAir™ Air Purification System—
Cleans the air in your home better than
any other single system you can buy
15GCSX 024 030 036 042 048 060
SEER 14.50 14.00 15.00 14.50 14.00 14.00
AFUE 78% 78% 78% 78% 78% 78%
Dimensions HxWxD (in.) 34-1/4 x 65-3/8 x 36-1/2 34-1/4 x 65-3/8 x 36-1/2 34-1/4 x 65-3/8 x 36-1/2 38-1/4 x 75 x 46 38-1/4 x 75 x 46 38-1/4 x 75 x 46
HxWxD (mm) 870 x 1661 x 927 870 x 1661 x 927 870 x 1661 x 927 972 x 1905 x 1168 972 x 1905 x 1168 972 x 1905 x 1168
Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
Proper sizing and installation of
equipment are critical to achieve optimal
performance. Split system air conditioners
and heat pumps must be matched
with appropriate coil components to
meet ENERGY STAR
Lennox dealer for details, or visit www.
energystar.gov.
®
criteria. Ask your
Lennox® System Operations
Monitor
– Continuously monitors
system operation for added reliability
and faster, more accurate servicing.
3

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 ssafe, 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.
(83M66) 15GC SX 03/08
© Lennox Industries Inc. 2008
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.
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