Using Indoor Air For Combustion

When using air from other room(s) in the building, the total volume of the room(s) must be of adequate volume (Greater than 50 cubic feet per 1000 Btu/hr). Each Combustion air opening must have at least one square inch of free area for each 1000 Btuh, but not less than 100 square inches each.

Using Outdoor Air For Combustion

Outdoor air can be provided to a confined space through two permanent openings, one commencing within 12 in. (300mm) of the top and one commencing within 12” (300mm) of the bottom, of the confined space. The openings shall communicate to the outside by one of two ways:

directly through horizontal ducts indirectly through vertical ducts

When communicating directly with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in2/2000 Btu/hr (1100 mm2/ kW) of total input rating of all appliances in the confined space.

Note: If ducts are used, the cross sectional area of the duct must be greater than or equal to the required free area of the openings to which they are con- nected.

When communicating indirectly with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in2/4000 Btu/hr (550 mm2/ kW) of total input rating of all appliances in the confined space. Combus- tion air to the appliance can be provided from a well ventilated attic or crawl space.

Rinnai E-Series

Gas Vent / Boiler Exhaust

OUTLET AIR DUCT

INLET AIR DUCT

BOILER

Gas Vent / Boiler Exhaust

OUTLET

AIR

INLET

AIR

Ventilation Louvers for unheated crawl space

BOILER

Installation & Servicing Instructions

Gas Vent / Boiler Exhaust

 

OUTLET

BOILER

AIR

 

INLET AIR DUCT

 

[Ends 1Ft (300mm)

 

above floor]

 

36

Louvers and grills

figure 18

 

 

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Image 36
Rinnai E110CP, E75CN, E110CN, E75CP user manual Using Indoor Air For Combustion, Using Outdoor Air For Combustion

E75CP, E110CN, E75CN, E110CP specifications

Rinnai is a leading name in the heating industry, recognized for producing highly efficient and reliable tankless water heaters. Among their popular models are the Rinnai E75CN, E75CP, E110CP, and E110CN, each designed to cater to various household needs and preferences.

The Rinnai E75CN and E75CP are both remarkable for their compact size and impressive heating capabilities. The E75CN is a natural gas model, while the E75CP runs on propane. These units are designed to deliver a maximum flow rate of up to 7.5 gallons per minute, ensuring that multiple fixtures can be used simultaneously without a dip in performance.

Both models incorporate advanced temperature control technology, allowing users to set their desired water temperature with precision. The units feature a durable heat exchanger, constructed from high-grade stainless steel, which not only promotes longevity but also helps in preventing corrosion. Additionally, they come with built-in safety features, such as freeze protection and an overheat cut-off system, ensuring safe operation in varying conditions.

Moving on to the Rinnai E110CP and E110CN, these tankless water heaters are designed for larger households with higher hot water demands. The E110CP operates on propane, while the E110CN utilizes natural gas. These units deliver a maximum flow rate of up to 11 gallons per minute, making them ideal for simultaneous use in multiple bathrooms, kitchens, and laundry rooms.

The E110 models showcase Rinnai's Smart Technology, which optimizes energy consumption by adjusting the heating output based on the demand. This not only maximizes efficiency but also significantly reduces energy costs. They are equipped with digital controls and diagnostics, providing users with real-time information and the ability to troubleshoot easily if any issues arise.

In terms of installation, all four models are designed for versatility. They can be installed indoors or outdoors, giving homeowners flexibility based on their space and preference. With their compact design, these units require less space compared to traditional tank heaters, making them a suitable choice for modern homes.

Overall, Rinnai's E75CN, E75CP, E110PC, and E110CN models represent cutting-edge technology in tankless water heating. Their efficiency, safety features, and advanced technology make them an excellent choice for homeowners looking to upgrade their hot water systems. With Rinnai, users can enjoy the convenience of continuous hot water without sacrificing energy efficiency.