Stack Type Indoor Draft Hood Kit, Indoor Draft Hood Installation

Air supply requirements below apply to all

Draft Hood

Installation (contd.)	16

NOTE

The heater requires two uninterrupted air supply openings; one for ventilation and one to supply oxygen for proper gas combustion. The air supply openings should be sized according to Tables 12. and 13.

b)Construct a non-combustible base from masonry blocks as illustrated, see Figure 17.

BASE FOR USE ON

COMBUSTIBLE FLOORS

Air supply requirements below apply to all

MiniMax heaters

All opening sizes are minimum and unobstructed.

	All Air From Inside

Model	Air for Combustion	Air Ventilation
Model	Sq. In.	Sq. In.
	Sq. In.	Sq. In.

150	150	150

200	200	200

250	250	250

SHEET

METAL

BLOCKS

Figure 17.

.
Min
6"
	.
	in
"	M
"
6

HOLLOW MASONARY BLOCKS, NOT LESS THAN

4" THICK (LAID WITH ENDS UNSEALED AND JOINTS MATCHED FOR AIR CIRCULATION). COVER BLOCKS WITH 24 GA. (MIN.) GALVANIZED SHEET METAL.

300	300	300

350	350	350

400	400	400

Table 12.

	All Air From Outside

Model	Air for Combustion	Air Ventilation
Model	Sq. In.	Sq. In.
	Sq. In.	Sq. In.

150	37	37

200	50	50

250	63	63

300	77	77

350	90	90

400	100	100

Table 13.

INSTALLATION ON FLOORS CONSTRUCTED OF COMBUSTIBLE MATERIALS

The heater may be placed on a “combustible floor” using either of the two methods listed below:

a)Use Listed Factory Non-combustible Base Kit for use on combustible floors.

Model Non-Combustible Base Kit

CAUTION

Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.