Lennox G21Q Series Unit Information

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SPECIFICATIONS (contd.)
SPECIFICATIONS (units equipped with electronically controlled blower motor)
Model No. GSR21V380 GSR21V580 GSR21V5100
Input Btuh 80,000 80,000 100,000
Output Btuh 71,000 72,000 92,000
*A.F.U.E. 94.5% 94.6% 92.0%
California Seasonal Efficiency 92.5% 92.1% 89.7%
Temperature rise range (°F) 40  70 30  60 45  75
High static certified by A.G.A. (in wg.) .80 .80 .80
Gas Piping Size Natural 1/2 1/2 1/2
I.P.S. (in.) •LPG 1/2 1/2 1/2
Vent/Intake air pipe size connection (in.) 2 2 2
Condensate drain connection (in.) SDR11 1/2 1/2 1/2
Blower wheel nominal diameter x width (in.) 10 x 8 111/2 x 9 111/2 x 9
Blower motor hp 1/2 1 1
Number and size of filters (in.) (1) 20 x 25 x 1
Tons of cooling that can be added 2  3 31/2  5 31/2  5
Electrical characteristics
120V − 60hertz − 1 phase
12.0 Amps Max
120V − 60hertz − 1 phase − 14.5 Amps Max
•LPG kit (optional) **Furnished LB65810C
Optional Horizontal Support Frame Kit  Ship. Weight LB56495CA (All Models)  18 lbs.
Optional Downflow Additive Base  Shipping Weight LB80639BB (All Models)  6 lbs.
•LPG kit must be ordered extra for field changeover.
*Annual Fuel Utilization Efficiency based on D.O.E. test procedures and according to F.T.C. labeling regulations.
Isolated combustion system rating for nonweatherized furnaces.
**LPG orifice furnished as standard with unit for field changeover. Convertible gas valve requires simple adjustment without adding any parts. See installation instructions.
BLOWER DATA
(units equipped with conventional multispeed blower motor)
G21Q340, G21Q360 AND G21Q380
BLOWER PERFORMANCE
External Static Air Volume @ Various Speeds
Pressure
(in. wg)
High Medium Low
0 1585 1392 920
.05 1558 1364 917
.10 1533 1354 915
.15 1505 1335 912
.20 1477 1315 905
.25 1447 1294 893
.30 1418 1272 887
.40 1355 1225 858
.50 1282 1164 803
NOTE  All cfm data is measured external to unit with the air filter in place.
G21Q580 BLOWER PERFORMANCE
ExternalStatic Air Volume (cfm) @ Various Speeds
Pressure
(in. wg)
High MedHigh Medium MedLow Low
0 2460 2350 2155 1900 1695
.05 2430 2310 2130 1875 1675
.10 2395 2275 2100 1855 1655
.15 2355 2240 2065 1825 1625
.20 2315 2205 2035 1800 1600
.25 2275 2175 1995 1780 1570
.30 2235 2130 1960 1740 1540
.40 2155 2055 1880 1675 1480
.50 2070 1970 1790 1605 1410
.60 1980 1890 1710 1540 1345
NOTE  All cfm data is measured external to unit with the air filter in place.

Lennox G21Q Series Specifications

General

Brand	Lennox
Model	G21Q Series
Category	Industrial Equipment
Language	English