Air From Other Indoor Spaces

Outdoor Air Through Two Vertical Ducts

The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only.

Do not refer to these illustrations for the purpose of vent installation. See Venting Installation on page 15 for complete venting installation instructions.

When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than 3 inches.

Figure 17

The confined space shall be provided with two permanent vertical ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The vertical ducts shall communicate directly with the outdoors. See Figure 17.

Each duct opening shall have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.

Figure 18

The confined space shall be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. See Figure 18.

Each opening shall communicate directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an Unconfined Space.

Each opening shall have a minimum free area of 1 square inch per 1,000 Btu/hr (2200 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening shall not be less than 100 square inches (645 cm2).

D85500PE, D85500NE specifications

Reliance Water Heaters offers a diverse range of high-performance water heaters, with the D85500NE and D85500PE models standing out for their exceptional features and innovative technologies. Designed to meet the needs of modern households, these water heaters are engineered for efficiency, reliability, and ease of use.

The D85500NE is a natural gas water heater that boasts a 50-gallon capacity, making it an excellent choice for medium to large households. One of its main features is the Energy Factor (EF) rating, which ensures efficient operation and reduces energy costs. With a recovery rate of approximately 41 gallons per hour, it's capable of delivering a steady supply of hot water without delays, ensuring that families can enjoy uninterrupted use during peak demands.

The D85500PE model, on the other hand, operates using propane, catering to households with propane systems. Like its natural gas counterpart, the D85500PE also has a 50-gallon capacity and delivers a comparable recovery rate. Both models feature a glass-lined tank, providing corrosion resistance and extending the lifespan of the water heater. This protective lining is crucial for maintaining water quality and ensuring durability over time.

In terms of technology, both the D85500NE and D85500PE are equipped with advanced thermostat and burner systems that allow for precise temperature control. The integrated piezo ignition allows for easy start-up, enabling users to ignite the burner with a simple push of a button. Additionally, the water heaters are designed with safety features such as a pressure relief valve, which prevents excessive pressure build-up.

Another notable characteristic of these models is their user-friendly accessibility. Maintenance access is made simple with installation features that enable straightforward servicing and repairs. The compact design of the units also allows for versatile installation options, whether in a basement, garage, or utility closet.

Finally, both the D85500NE and D85500PE are backed by a solid warranty, providing peace of mind for consumers. With their combination of efficiency, reliability, and advanced features, these water heaters from Reliance Water Heaters are an outstanding choice for anyone looking to enhance their home’s hot water system.