Heating Systems (Hastings Industries Inc.)

"I" SERIES INDOOR SYSTEMS

Blower Table - IHFAX, IMUAX & IHVAX Models with Double Bank Furnaces

IHFAX,IMUAX&IHVAX			Blower Used	Duct Furn. used	Air Temperature Rise
IHFAX,IMUAX&IHVAX					20°			25°			30°			35°			40°			45°
Model NO. & MBH Input	Btuh Output	Ship Wt. Lbs.			20°			25°			30°			35°			40°			45°
Model NO. & MBH Input	Btuh Output	Ship Wt. Lbs.			CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP
510	394,800	2,110	MB-218	2) 255	18,415	1.24 2.11	10 15	14,735	1.38 1.91	7-1/2 10	12,280	1.15 1.81	5 7-1/2	10,525	.81 1.42	3 5	9,210	.99 1.62	3 5	8,185	1.14 1.77	3 5
600	468,000	2,190	MB-218	2)300	21,665	.64 1.46	10 15	17,335	.93 1.44	7-1/2 10	14,445	1.43 1.96	7-1/2 10	12,380	1.13 1.79	5 7-1/2	10,835	.77 1.37	3 5	9,630	.93 1.55	3 5
800	608,000	2,480	MB-218	2) 400	28,150	- .55	- 20	22,520	.48 1.28	10 15	18,765	1.18 2.05	10 15	16,085	1.15 1.67	7-1/2 10	14,075	.88 1.50	5 7-1/2	12,510	1.11 1.77	5 7-1/2

Blower Table - IHFB, IMUB & IHVB Models with Double Bank Furnaces

IHFB, IMUB, IMVB			Blower Used	Duct Furn. used	Air Temperature Rise
IHFB, IMUB, IMVB					40°			50°			60°			70°			80°			90°
Model NO. & MBH Input	Btuh Output	Ship Wt. Lbs.			40°			50°			60°			70°			80°			90°
Model NO. & MBH Input	Btuh Output	Ship Wt. Lbs.			CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP	CFM	Total S.P.	HP
1020	795,600	3,075	MB-218	4) 255	18,415	1.24 2.11	10 15	14,735	1.38 1.91	7-1/2 10	12,280	1.15 1.81	5 7-1/2	10,525	.81 1.42	3 5	9,210	.99 1.62	3 5	8,185	1.14 1.77	3 5
1200	936,000	3,235	MB-218	4)300	21,665	.64 1.46	10 15	17,335	.93 1.44	7-1/2 10	14,445	1.43 1.96	7-1/2 10	12,380	1.13 1.79	5 7-1/2	10,835	.77 1.37	3 5	9,630	.93 1.55	3 5
1600	1,216,000	3,815	MB-218	4) 400	28,150	- .55	- 20	22,520	.48 1.28	10 15	18,765	1.18 2.05	10 15	16,085	1.15 1.67	7-1/2 10	14,075	.88 1.50	5 7-1/2	12,510	1.11 1.77	5 7-1/2

(*) Weights listed are for suspended units.

NOTES: Total static pressure shown in inches of water

Shaded areas require cleanable filters.

NOTES: Total static pressure shown in inches of water.

Shaded areas require cleanable filters.

Equipment Selection

IHF-SPACE HEATING

1. Select model size according to Btuh requirements.

2. Specify desired air delivery or temperature rise. For normal applications, an air delivery resulting in a 70° F temperature rise in recommended.

3. Specify motor size to deliver the selected SCFM against required TSP (total static pressure).

IMU-MAKE-UP AIR

1. Check the exhaust specifications or equipment to determine the total SCFM of fresh air required.

2. Increase the total SCFM by approximately 10% if building needs to be slightly pressurized.

3. Determine air temperature rise, usually 70° F minus winter outside design temperature.

4. Select model and motor size to deliver desired air temperature rise and SCFM against required TSP.

IHV - HEATING & VENTILATING

1. Calculate the total SCFM of outside air needed to satisfy exhaust air requirements and meet ventilation specifications.

2. Find the Btuh output needed to heat the total SCFM of outside air by multiplying SCFM X TD (room temperature minus winter outside design temperature) X 1.08.

3. Find total Btuh output by adding the space heat loss to the btuh ventilation requirement from step 2.

4. Select model and motor size to deliver total Btuh output and SCFM against required TSP. The SCFM chosen must equal or exceed the volume required for ventilation.

NOTE: Toral static pressure as found in the blower tables must overcome total system resistance. Duct furnace and accessory equipment air pressure losses are found on page 6 of this bulleting. Total system resistance is the total of these pressure drops added to the air pressure loss of all system duct work and registers.

MODEL DESIGNATION

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Heating Systems - Page 14