Section 7 Ducts and Flues for Air Intake and Combustion-product Discharge

701. General

1. Flue components including ductwork and terminals are to be installed in accordance with the manu- facturer's instructions for small craft installations.

2. Flues are to be routed and sized to ensure complete discharge of the products of combustion out-

side the craft, including any areas which can be enclosed by canopies, and so structed by an accumulation of water.

3. The flue system and air-intake duct system are each to be continuous and sealed from the appliance to its terminal outside the craft.

4. Dampers (shut-off valves) are not to be installed in flue systems.

5. The entire flue system is to be accessible for inspection.

as not to be ob-

to be vapour-tight

Ch 10 LPG System for Domestic Use Ch 10

6. Flue terminals for exhaust-product discharge are not to be positioned within 500 mm of a ventilator, opening port, hatch, window, refueling fitting or fuel-tank vent outlet.

7. Flue terminals are to be of substantial construction or provided with guards that are sufficient to prevent damage by accidental contact. Such guards on exhaust discharge outlets also prevent injury due to contact with hot surfaces.