Gas Units (Hastings Industries Inc.)

Specification – Fan Models

Fan Model	Btuh Rating(1)		Temp. Rise °F	Air Delivery SCFM	Fan Diam. Inches	Motor (2)				Weight
Fan Model	Input	Output	Temp. Rise °F	Air Delivery SCFM	Fan Diam. Inches	H.P	AMPS	RPM	Type	Crated	Net
F- 500	50,000	37,500	66	530	12	1/40	1.0	1050	Sh.p	128	98
GF-100	100,000	76,000	57	1230	14	1/15	2.2	1050	Sh.p	164	134
GF-120	120,000	91,200	57	1475	16	1/15	2.2	1050	Sh.p	173	143
GF - 160	160,000	121,600	57	1970	18	1/8	2.1	1050	S.C	216	184
GF - 200	200,000	152,000	57	2460	18	1/6	3.1	1050	S.C	268	223
GF - 250	250,000	190,000	57	3080	20	1/3	5.8	1050	S.C	337	282
GF - 300	300,000	228,000	62	3420	20	1/3	5.8	1050	S.C.	390	330
GF - 400	400,000	304,000	57	4950	2)20	2)1/6	6.2	1050	S.C	514	449

(1) Rating shown are elevations up to 2,000 ft. For over 2,000 ft. reduce ratings 4% for each 1,000 ft. above sea level.

(2) Cushion mounted and overload protected. All motors except F - 50 are totally enclosed "Sh.P" is Shaded Pole. "S.C." is Split Capacitor, Standard motors are 115/60/1.

10 Year Heat Exchange Guarantee

The Complete Heat Exchanger of the Hasting Gas Fired Unit Heater is guaranteed for 10 years. This is not a pro-rated or "mileage" type warranty ; it provides full coverage during the entire guarantee period "if the heat exchanger should fail at any time during the first ten years of normal space heating operation, it will be replaced free of charge (labor not included)."

This warranty provides protection against normal wear and tear during the specified time but does not apply to equipment which has been subjected to misuse, negligence or accident; nor to equipment which has not been installed, operated and serviced accordingly to printed factory instructions; nor to equipment which has been operated beyond the factory rated capacity, nor to equipment which has been altered in any way so that the performance of the equipment is affected.

Estimating Heat Loss

TABLE 1. HEAT LOSS FACTORS

TO MAINTAIN 70° TEMPERATURE DIFFERENCE BETWEEN INSIDE AND OUTSIDE	NUMBER OF EXPOSED WALLS	CEILING EXPOSURE
	NUMBER OF EXPOSED WALLS	HEATED SPACE ABOVE	ROOF INSULATED	ROOF NOT INSULATED
		FACTOR	FACTOR	FACTOR
	4	4.0	4.5	5.5
	3	3.5	4.0	5.0
	2	3.0	3.5	4.5
	1	2.5	3.0	4.0

TABLE 2. CORRECTION FACTORS

TEMPERATURE DIFFERENCE	50º	60º	70º	80º	90º
MULTIPLIER	0.72	0.86	1.00	1.14	1.28

This short-cut method may be used to determine appropriate unit heater output required. (Use conventional methods for more accurate calculations.)

HEAT LOSS (Btuh) = Cubic feet of space x Factor.

For large glass area in two or more walls, add 10% to 20%.
For garages, add from 20%-50% to Table 1, depending on traffic and exposure.
For temperature difference other than 70º, multiply by correction factor Table 2.

EXAMPLE : Room 82 x 45 x 12; two walls exposed; space above is heated. Design temperature : -10º outside, 70º inside (temperature difference = 80º.)

SOLUTION : HEAT LOSS = 44,280 (cu.ft.) x 3 (from Table 1) x 1.14 (from Table 2) = 151,438 Btuh

INPUT (Btuh) = Heat Loss x 1.32 = 151,438 x 1.32 = 199,898 Btuh

USE : Two (2) Model GF - 100 Unit Heaters

Throw Chart – "F" and "GF" Models.

Mounting Height (2)	Heater Size and Louvers Position (1)
Mounting Height (2)	50		100		120		160		200		250		300		400
	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"
10'	20	15	49	37	59	44	68	51	-	-	-	-	-	-	-	-
12'	-	-	44	34	53	41	62	47	72	54	81	61	90	68	-	-
14'	-	-	39	29	49	38	57	43	66	50	75	56	84	63	103	78
16'	-	-	-	-	44	33	51	38	60	45	67	50	76	57	95	70
18'	-	-	-	-	-	-	46	35	55	41	61	46	69	52	87	63
20'	-	-	-	-	-	-	-	-	51	38	56	42	63	47	78	57

(1) "A" equal throw of standard unit with horizontal louvers only.
"B" equal throw with optional vertical louvers turned "out."

(2) Distance from floor to top heater.
To find spread : Horizontal louvers only = 45 %; Optional vertical louvers turned "out" = 80 % of throw . By adjusting louvers, a
wide variation throw spread can be obtained.

Gas Units - Page 2