btahere.blogg.se - Cs 1.6 upc 8.5 shall hack

In the case of vents leading outdoors, means shall be employed to prevent water from entering this piping and also to prevent blockage of vents by insects and foreign matter.

Vent limiting means shall be employed on listed appliance pressure regulators only.

Appliance pressure regulators requiring access to the atmosphere for successful operation shall be equipped with vent piping leading outdoors or, if the regulator vent is an integral part of the appliance, into the combustion chamber adjacent to a continuous pilot, unless constructed or equipped with a vent limiting means to limit the escape of gas from the vent opening in the event of diaphragm failure.

Venting of gas appliance pressure regulators shall comply with the following requirements:

The remaining space surrounding a chimney liner, gas vent, special gas vent, or plastic piping installed within a masonry, metal, or factory built chimney shall not be used to supply combustion air.

Horizontal upper combustion air ducts shall not slope downward toward the source of combustion air.

Combustion air intake openings located on the exterior of the building shall have the lowest side of the combustion air intake openings located at least 12 inches (305 mm) vertically from the adjoining finished ground level.

Ducts shall not be screened where terminating in an attic space.

The separation between ducts serving upper and lower combustion air openings shall be maintained to the source of combustion air. Ducts shall not serve both upper and lower combustion air openings where both such openings are used.

Ducts shall terminate in an unobstructed space, allowing free movement of combustion air to the appliances.Gas-Fired, Above 75 000 Btu/h, Storage and InstantaneousĮxception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one fire-block is removed. Unlisted water heaters shall be permitted in accordance with Section 504.3.2. Listed appliances shall be installed in accordance with the manufacturer's installation instructions. A list of accepted water heater appliance standards is referenced in Table 501.1(1). No water heater shall be hereinafter installed that does not comply with the manufacturer's installation instructions and the type and model of each size thereof approved by the Authority Having Jurisdiction. The minimum capacity for storage water heaters shall be in accordance with the first-hour rating listed in Table 501.1(2). The regulations of this chapter shall govern the construction, location, and installation of fuel-burning and other types of water heaters heating potable water, together with chimneys, vents, and their connectors.