O25 Oil Furnace ◆ Up to 84% AFUE
LENNOX’ ELITE® SERIES
Home Comfort Systems
O25
Clean, quiet and comfortable home heating
Elite® Series O25 Oil Furnace
Efficient operation can result
™
in significant energy savings
Quality components ensure
long-lasting reliability
Simple, durable design
allows easy maintenance
and serviceability
Compact size fits easily in
almost any closet, crawlspace
or basement, leaving plenty
of room for add-on
air conditioning coil
Innovation never felt so good.
The Elite® Series O25 oil furnace offers a clean, quiet and economical way to
keep your home warm and comfortable. High-quality components like the
Riello burner reliably deliver heat to every room—year after year, with little
maintenance required.
CLEAN, QUIET AND COMFORTABLE HEATING,
WITH EASY MAINTENANCE
Built to exacting standards, the O25 furnace not only keeps you cozy and
comfortable—it also keeps your energy costs at a minimum. With efficiency
ratings of up to 84%, the O25 produces more heat per fuel dollar, which
means you’ll stay warm for less.
EFFICIENCY RATING
Up to 84% AFUE (Annual
Fuel Utilization Efficiency).
WARRANTY*
Limited lifetime warranty
on the heat exchanger.
5-year limited warranty
on all remaining covered
components.
*Applies to residential applications only.
See actual warranty certificate for details.
2
Efficient Can save
you money each year on
your utility bills
The O25 furnace is designed to
deliver lasting value and energy
savings. With heating efficiencies
of up to 84% AFUE, the O25 can
drastically reduce your energy costs,
compared to older furnaces.
3-YEAR HEATING SAVINGS
84%
vs. 55%
$4127
$2288
84%
vs. 65%
$4000
$3500
$3000
$2500
$2000
0
AFUE
84% efficient O25 oil furnace vs.
55% and 65% equivalent AFUE units
This chart depicts potential energy savings you can
expect from the O25 furnace versus older furnaces with
lower efficiency ratings. Criteria used in this example
are 2,000 full-load heating hours, with a 80,000-Btuh
heating design load and $1.90 per gallon for oil. Your
actual savings will vary depending on the weather, local
fuel rates and your lifestyle.
Source: Energy Information Administration, U.S.
Department of Energy national average energy rates,
2005 forecast.
INNOVATIVE FEATURES FOR ENHANCED COMFORT AND EFFICIENCY
more energy-efficient
97%
78%
THIS MODEL
81.5%-84%
Heat Exchanger –
Constructed of heavy-gauge steel for maximum life.
Innovative Combustion Chamber –
Constructed from alumina-silica ceramic fiber,
provides quiet operation and high efficiency.
Riello Burner –
Delivers super-efficient combustion for greater fuel economy. A
high-quality burner with special attention to sound reduction.
Blower Motor –
Multi-speed, direct-drive system that is statically and
dynamically balanced.
Insulated Blower Compartment –
Minimizes operating sounds.
Durable, Insulated Steel Cabinet –
Built to last and coated with a high-quality paint finish.
Quality you can trust.
Designed with reliable, time-tested components.
Elite® Series O25 Specifications
O25 Upflow 025Q2-70 Q2/3-105/120 Q4/5-140/154
AFUE 84% 82% 81.5%
Dimensions HxWxD (in.) 54 x 19-1/2 x 30-5/8 54 x 19-1/2 x 30-5/8 54 x 22-1/2 x 33-1/8
HxWxD (mm) 1372 x 495 x 778 1372 x 495 x 778 1372 x 572 x 841
OF25 Lo-Boy (Rear Flue) Q2/3-105/120R
OF25 Lo-Boy (Front Flue) Q2/3-105/120
AFUE 82% front/82.5% rear
Dimensions HxWxD (in.) 37 x 19-1/2 x 52-1/8
HxWxD (mm) 940 x 495 x 1324
OHR25 Down-flow/Horizontal Q2/3-105/120
AFUE 83.5%
Dimensions HxWxD (in.) 59 x 23-1/2 x 23-1/2
HxWxD (mm) 1499 x 597 x 597
Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
Lennox is proud of the
fact that these products
have earned the Good
Housekeeping Seal.
O25
Up to
84% AFUE
3
1 Air conditioner or heat pump
2 Thermostat
3 Furnace or air handler
4 Filtration device
5 Germicidal light
6 Indoor coil
7 Humidifier
8 HEPA bypass filtration system
9 Energy recovery ventilator
Supply duct
Return duct
CUSTOMIZE YOUR COMFORT
Lennox® heating, cooling and Healthy Climate® 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.
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.
© Lennox Industries Inc. 2005
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.
PC47245(14W64) O 25 11 /06
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