Instructions / Assembly

System 636 Installation Methods

(g) A reducer may be used on the vent termination to increase the velocities of the exiting

gases away from the intake (see Figures 1 & 3). Do not direct exhaust to window wells,

alcoves or stairwells.

(h) The exit points of gas venting pipe must not be less than 3 ft. from an opening into

another building.

(i) Domestic Type Clothes Dryers

(Type 1):

A moisture-exhaust duct from a domestic type clothes dryer shall not terminate within 3 ft (1m) in

any direction of any System 636 pressure regulator vent termination or fresh air intake.

Commercial Type Clothes Dryers

(Type 2):

A dryer shall be connected to a metal moisture-exhaust duct that terminates outdoors

and shall not be less than 3 ft (1m) from any System 636 pressure regulator vent

terminations and not less than 10 ft (3m) from a fresh-air intake.

(j) The termination of the fresh air intake through the wall should be such that the bottom of the 90º elbow must be at a level of at

least 12 inches above the expected height of snow accumulation (see Figure 3).

(k) Except for: 1) appliances certified to ANSI Z21.10.3 / CSA 4.3 (Gas-fired Water Heaters,

Volume III, Storage water heaters with input

ratings above 75,000 Btu per hour, circulating and instantaneous)

and 2) appliances certified to ANSI Z21.13 / CSA 4.9 (Gas-fired low

pressure steam and hot water boilers) insulating in unconditioned space is required for all vent piping. Insulation should also be considered

for inlet piping near the outside wall to prevent pipe condensation (See Figure 1). Insulation must have an R value sufficient to prevent

freezing of condensate. Consult with the insulation manufacturer for compatibility of insulation with System 636 pipe and fittings.

12" MAXIMUM

Side View

Typical Wall Termination Restricted Grade

Insulation in

unconditioned space

Reducer Coupling

Provide support for

intake and vent

lines every 5 feet

Unconditioned space

Outside wall

Insulation

8" MINIMUM

12" Above expected

snow accumulation

Vent

Intake

Figure 3