Lenoxx Electronics Furnace O25 User Manual

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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