INNOVATIVE FEATURES FOR ENHANCED COMFORT AND EFFICIENCY

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

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.

THIS MODEL

81%-83%

3