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THIS MODEL
81%-83%
INNOVATIVE FEATURES FOR ENHANCED COMFORT AND EFFICIENCY
Elite
®
Series O23 Specifications
O23 Up-flow Q2/3-70/90 Q3/4-105/120 Q5-140/154
AFUE 83% 81% 81%
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
OF23 Lo-Boy (Rear Flue) Q3/4-105/120R Q5-140/154R
OF23 Lo-Boy (Front Flue) Q3/4-105/120 Q5-140/154 OF23Q5-175/210R
AFUE 81% 81% 80%
Dimensions HxWxD (in.) 37 x 19-1/2 x 52-1/8 37 x 22-1/2 x 52-1/8 39 x 24 x 54-3/4
HxWxD (mm) 940 x 495 x 1324 940 x 572 x 1324 991 x 610 x 1391
OHR23 Down-flow/Horizontal Q3-105/120 Q5-140/154
AFUE 81% 81%
Dimensions HxWxD (in.) 59 x 20-1/2 x 20-1/2 59 x 23-1/2 x 23-1/2
HxWxD (mm) 1499 x 521 x 521 1499 x 597 x 597
Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
Heavy-Gauge Steel Heat Exchanger –
Allows air to glide evenly over its smooth surface for
maximum heating efficiency.
Innovative Combustion Chamber –
Constructed from alumina-silica ceramic fiber, provides
quiet operation and high efficiency.
Beckett AFII Burner –
Delivers super-efficient combustion for greater
fuel economy.
Heavy-Duty Fuel Pump –
Provides quiet, reliable operation with fast shutoff of oil flow.
Insulated Blower Compartment –
Minimizes operating sounds.
Durable, Insulated Steel Cabinet –
Built to last and coated with a high-quality paint finish.
O23
Up to
83% AFUE