Sterling GG-120 Unit Size, Performance Data†, MOTOR DATA Motor HP, DIMENSIONAL DATA - inches mm

Table 1 - Performance and Dimensional Data - Tubular 30 thru 120 Propeller Unit Heater

Unit Size	30	45	60	75	90	105	120
PERFORMANCE DATA†
Input - BTU/Hr.	30,000	45,000	60,000	75,000	90,000	105,000	120,000
(kW)	(8.8)	(13.2)	(17.6)	(22.0)	(26.4)	(30.8)	(34.2)
Output - BTU/Hr.	24,300	36,450	48,600	60,750	72,900	85,050	97,200
(kW)	(7.1)	(10.7)	(14.2)	(17.8)	(21.4)	(24.9)	(28.5)
Thermal Efficiency (%)	81	81	81	81	81	81	81
Free Air Delivery - CFM	370	550	740	920	1,100	1,300	1,475
(cu. m/s)	(.175)	(.260)	(.349)	(.434)	(.519)	(.614)	(.696)
Air Temperature Rise - Deg. F	60	60	60	60	60	60	60
(Deg. C)	(15)	(15)	(15)	(15)	(15)	(15)	(15)
Full Load Amps at 120V	3.0	3.0	3.7	4.1	6.4	6.4	6.4
Maximum Circuit Ampacity	3.5	3.5	4.4	4.8	7.5	7.5	7.5
MOTOR DATA: Motor HP	1/20	1/20	1/12	1/12	1/10	1/10	1/10
Motor (kW)	(0.04)	(0.04)	(0.06)	(0.06)	(0.075)	(0.075)	(0.075)
Motor Type	SP	SP	SP	SP	SP	SP	SP
R.P.M.	1650	1650	1050	1050	1050	1050	1050
Motor Amps @ 115V	1.9	1.9	2.6	2.6	4.2	4.2	4.2
DIMENSIONAL DATA - inches (mm)
“A” Jacket Height	12-3/8	12-3/8	15-7/8	15-7/8	22-5/8	22-5/8	22-5/8
	(314)	(314)	(403)	(403)	(574)	(574)	(574)
“B” Overall Height	13-1/4	13-1/4	16-13/16	16-13/16	23-9/16	23-9/16	23-9/16
	(337)	(337)	(427)	(427)	(598)	(598)	(598)
“C” Overall Depth	25-7/8	25-7/8	26-3/16	26-3/16	26-3/8	26-3/8	26-3/8
	(632)	(632)	(665)	(665)	(670)	(670)	(670)
“D1” Center Line Height of Flue*	8-1/2	8-1/2	10-3/8	10-3/8	13-5/8	13-5/8	13-5/8
	(216)	(216)	(263)	(263)	(346)	(346)	(346)
“D2” Center Line Height of Air Intake	8-1/2	8-1/2	8	8	8-5/8	8-5/8	8-5/8
	(216)	(216)	(203)	(203)	(219)	(219)	(219)
“E” Fan Diameter	10	10	14	14	16	16	16
	(254)	(254)	(356)	(356)	(406)	(406)	(406)
“F” Discharge Opening Height	10-13/16	10-13/16	14-7/16	14-7/16	21-3/16	21-3/16	21-3/16
	(275)	(275)	(367)	(367)	(538)	(538)	(538)
“G” Vent Connection Diameter	4	4	4	4	4	4	4
	(102)	(102)	(102)	(102)	(102)	(102)	(102)
“H1” Center Line of Flue Connection From Side	7-1/4	7-1/4	7-1/4	7-1/4	7-3/4	7-3/4	7-3/4
	(184)	(184)	(184)	(184)	(197)	(197)	(197)
“H2” Center Line of Air Intake From Side	2-3/4	2-3/4	2-3/4	2-3/4	3-1/2	3-1/2	3-1/2
	(70)	(70)	(70)	(70)	(89)	(89)	(89)
Vent Size Requirements - Standard Combustion
Category I Horizontal**	4	4	4	5	5	5	5
	(102)	(102)	(102)	(127)	(127)	(127)	(127)
Category III Horizontal	4	4	4	4	4	4	4
	(102)	(102)	(102)	(102)	(102)	(102)	(102)
Category I & III Vertical	4	4	4	4	4	4	4
	(102)	(102)	(102)	(102)	(102)	(102)	(102)
Vent Size Requirements - Separated Combustion
Exhaust Diameter**	4	4	4	4	5	5	5
	(102)	(102)	(102)	(102)	(127)	(127)	(127)
Intake Air Diameter	4	4	4	4	5	5	5
	(102)	(102)	(102)	(102)	(127)	(127)	(127)
Unit Weight - lbs.	57	60	75	87	96	103	112
(kgs)	(27)	(29)	(34)	(37)	(45)	(48)	(49)
Shipping Weight - lbs.	67	70	90	96	109	143	152
(kgs)	(32)	(33)	(41)	(44)	(51)	(66)	(67)

*For all installations, the flue collar is included with the unit and should be field installed per the instructions included with the unit.

**4-5" reducer supplied where required.

†Ratings shown are for unit installations at elevations between 0 and 2,000 ft (0 to 610m). For unit installations in U.S.A. above 2,000 ft. (610m), the unit input must be derated 4% for each 1,000 ft. (305m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54), (also refer to Table 6).

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