Gas Units (Hastings Industries Inc.)

Specification – Fan Models

Fan Model	Btuh Rating(1)		Temp Rise ºF	Air Delivery SCFM	Fan Diam. Inches	Fan Motor (2)				Power Venter Motor (2)				Weight
Fan Model	Input	Output	Temp Rise ºF	Air Delivery SCFM	Fan Diam. Inches	H.P	AMPS	RPM	Type	H.P	AMPS	RPM	Type	Crated	Net
GFH-100	100,000	82,800	51	1475	19	1/15	2.2	1050	Sh.P	1/20	1.6	3000	S.C	188	149
GFH-140	140,000	115,850	54	1970	18	1/15	2.1	1050	S.C	1/20	1.6	3000	S.C	231	199
GFH-180	180,000	148,950	56	2460	18	1/8	4.0	1050	S.C	1/20	1.6	3000	S.C	283	238
GFH-230	230,000	188,600	57	3080	20	1/6	4.3	1050	S.C	1/5	2.5	3000	S.C	352	297
GFH-280	280,000	227,400	61	3420	20	1/3	5.1	1050	S.C.	1/5	2.5	3000	S.C	405	345
GFH-360	360,000	295,000	55	4950	2) 20	1/3	2) 4.0	1050	S.C.	1/5	2.5	3000	S.C	529	464

(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 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 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 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
		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 – GFH Models.

Mounting Height (2)	Heater Size and Louvers Position (1)
Mounting Height (2)	GFH-100		GFH-140		GFH-180		GFH-230		GFH-280		GFH-360
	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"	"A"	"B"
10'	59	44	68	51	59	-	-	-	-	-	-	-
12'	53	41	62	47	72	54	81	61	90	68	-	-
14'	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 % of throw; optional vertical louvers turned "out" = 80 % of throw . By adjusting louvers , a wide variation throw spread can be obtained.

Gas Units - Page 6