Lennox G27M Series Unit Information

3DJH 
SPECIFICATIONS
Model No. G27M2(X)-60 G27M3(X)-75 G27M4(X)-100 G27M5(X)-120
Input Btuh (kW) low fire 40,800 (12.0) 51,000 (14.9) 68,000 (19.9) 81,600 (23.9)
Output Btuh (kW) low fire 32,600 (9.6) 40,800 (12.0) 54,400 (16.0) 65,300 (19.1)
Input Btuh (kW) high fire 60,000 (17.6) 75,000 (22.0) 100,000 (29.3) 120,000 (35.2)
Output Btuh (kW) high fire 48,000 (14.1) 60,000 (17.6) 80,000 (23.5) 96,000 (28.2)
- A.F.U.E. 80%
Flue size connection diameter  in. (mm) round 3 (76) 4 (102)
Temperature rise range
E
F(
E
C)
Low fire 30 -- 60 (17 -- 33) 40 -- 70 (22 -- 39) 30 -- 60 (17 -- 33)
Temperature rise range  E F( E C)
High fire 40 -- 70 (22 -- 39)
High static certified by A.G.A./C.G.A.  in wg. (Pa) .50 (124)
Gas Piping Size I.P.S. Natural gas only 1/2 (13)
Blower wheel nominal
in. 9x7 10 x 7 12x8 12 x 9
Blower wheel nominal
diameter x width
mm 229 x 178 254 x 178 305 x 203 305 x 229
Blower motor output  hp (W) 1/4 (187) 1/3 (249) 1/2 (373) 3/4 (560)
Electrical characteristics 120 volts  60 hertz  1 phase (12 amps or less -- all models)
Nominal coolin
g
Tons 2 or 2.5 2, 2.5 or 3 3.5 or 4 3.5, 4 or 5
Nominal cooling
that can be added
kW 7.0 or 8.8 7.0, 8.8 or 10.6 12.3 or 14.1 12.3, 14.1 or 17.6
Up-flow/Horizontal Filter Kit (furnished)
c filter size  in. (mm)
(1) 16 x 20 x 1 (406 x 508 x 25) (1) 20 x 20 x 1(508 x 508 x 25)
Shipping weight  lbs. (kg) 1 package 135 (61) 175 (79)
H Optional Accessories (Must Be Ordered Extra) H
o
Do n flo
Catalog No. LB-69843A (32J01)  3 lbs. (1 kg)
o Down-flow
Filter Kit
No. & Size of Filters  in.
(mm)
(2) 16 x 20 x 1 (406 x 508 x 25)
Down-flow Combustible Floor Base LB-79239A (67J91)  10 lbs. (4 kg) LB-79239B (67J92)  10 lbs. (4 kg)
Hanging Bracket Kit LB-69957 (46J66)  15 lbs. (7 kg)
High Altitude Pressure Switch Kits (high fire)
80K40 80K43 18L25 18L25
- Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized
furnaces.
c Polyurethane frame type filter .
o Filters are not furnished with kit and must be ordered extra.
BLOWER PERFORMANCE DATA
G27M2(X)-60 BLOWER PERFORMANCE
External Static
Air Volume at Various Blower Speeds
External Static
Pressure
High Medium-High Medium-Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1270 600 980 460 770 365 570 270
.05 12 1245 590 975 460 770 365 565 265
.10 25 1220 575 975 460 770 365 565 265
.15 37 1195 565 965 455 765 360 560 265
.20 50 1170 550 960 455 760 360 560 265
.25 62 1140 540 950 450 760 360 555 260
.30 75 1110 525 940 445 760 360 550 260
.40 100 1060 500 910 430 750 355 545 255
.50 125 990 465 880 415 740 350 540 255
.60 150 900 425 810 380 690 325 530 250
.70 175 800 380 740 350 630 295 520 245
NOTE  All air data is measured external to unit with 1 inch (25 mm) air filter in place. NOTE -- Filter not furnished with unit.

Lennox G27M Series Specifications

General

Brand	Lennox
Model	G27M Series
Category	Furnace
Language	English