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o25 oil furnace up to 84% afue
LEnnOx’ ELitE® SEriES
Home Comfort Systems
O25
Clean, quiet and comfortable home heating
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innovative features for enhanCed Comfort and effiCienCy
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.
O25
Up to
84% afUE
Quality you can trust.
Designed with reliable, time-tested components.
elite® series o25 specifications
O25 Upflow
025Q2-70
Q2/3-105/120
82%
Q4/5-140/154
81.5%
AFUE
84%
Dimensions HxWxD (in.)
HxWxD (mm)
54 x 19-1/2 x 30-5/8
1372 x 495 x 778
54 x 19-1/2 x 30-5/8
1372 x 495 x 778
54 x 22-1/2 x 33-1/8
1372 x 572 x 841
OF25 Lo-Boy (Rear Flue)
OF25 Lo-Boy (Front Flue)
AFUE
Dimensions HxWxD (in.)
HxWxD (mm)
Q2/3-105/120R
Q2/3-105/120
82% front/82.5% rear
37 x 19-1/2 x 52-1/8
940 x 495 x 1324
OHR25 Down-flow/Horizontal
AFUE
Q2/3-105/120
83.5%
Dimensions HxWxD (in.)
HxWxD (mm)
59 x 23-1/2 x 23-1/2
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.
THIS MODEL
81.5%-84%
more energy-efficient
78%
97%
ꢀ
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Air conditioner or heat pump
Thermostat
Furnace or air handler
Filtration device
Germicidal light
Indoor coil
Humidifier
HEPA bypass filtration system
Energy recovery ventilator
10 Supply duct
11 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
(14W64) O25 11/06
PC47245
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