Venting Connections, Drafthood Indoor Models

2.Free ventilation air 1 sq. in. per 1000 BTU input within 12" of the ceiling level.

NOTE: If the room the heater is installed in is located against an outside wall and air openings communicate directly with the outdoors, the openings may be 1/4 the size specified above (ANSI Z223.1/NFPA 54, latest edition)

Venting Connections

Drafthood (Indoor) Models 962-1826

Locate and assemble as shown in Fig. 3. Secure with screws supplied in envelope in carton.

Fig. 3: Indoor Draft Hood

Models 2100-4001 have built-in drafthoods that must be properly vented to the outside.

must have a minimum of 1/4 inch per foot rise and should be supported at not more than five foot inter- vals. Plumbers' tape, criss-crossed, will serve to space both horizontal and vertical piping.

Gas vents supported only by the flashing and extend- ing above the roof more than five feet should be securely guyed or braced to withstand snow and wind loads. We recommend use of insulated vent pipe spacer through the roofs and walls.

For protection against rain or blockage by snow, the vent pipe must terminate with a vent cap which com- plies with the local codes or, in the absence of such codes, to the latest edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

The discharge opening must be a minimum of two feet vertically from the roof surface and at least two feet higher than any part of the building within ten feet. Vent stack shall be at least five feet in vertical height above the drafthood outlet. The vent cap location shall have a minimum clearance of 4 feet horizontally from, and in no case above or below, unless a 4-foot hori- zontal distance is maintained, from electric meters, gas meters regulators and relief equipment.

The weight of the vent stack or chimney must not rest on heater drafthood. Support must be provided in compliance with applicable codes. The heater top and draft hood must be readily removable for maintenance and inspection. Vent pipe should be adequately sup- ported to maintain proper clearances from combustible construction.

Type "B" double wall or equivalent vent pipe is recom- mended. However, single wall metal vent pipe may be used as specified in the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54.

Vent Piping

WARNING: Indoor heater requires a drafthood that must be connected to a vent pipe and properly vented to the outside. Failure to follow this procedure can cause fire or fatal carbon monoxide poisoning.

Vent piping the same size or larger than the draft hood outlet is recommended, however, when the total vent height is at least ten (10) feet (drafthood relief opening to vent terminal), the vent pipe size may be reduced as specified in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest edition. Avoid long horizontal runs of vent pipe and too many elbows. If installation requires horizontal or non-vertical runs, the vent pipe

10' OR LESS

VENT CAP

2' MIN

5' MIN

VENT PIPE

DRAFT HOOD

HEATER

Fig. 4:Venting Clearances