Combustion Air and Ventilation for Appliances Located in Unconfined Spaces

UNCONFINED SPACE is space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kW) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in Combustion Air and Ventilation for Appliances Located in Confined Spaces.

Combustion Air and Ventilation for Appliances Located in Confined Spaces

CONFINED SPACE is a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kW) of the aggregate input rating of all appliances installed in that space.

A.ALL AIR FROM INSIDE BUILDINGS:

(See Figure 10 on page 11 and Figure 11 below)

The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of one square inch per 1,000 Btu per hour (22 cm2/kW) of the total input rating of all gas utilization equipment in the confined space, but not less than 100 square inches (645 cm2). One opening shall commence within 12 inches (30 cm) of the top and one commencing within 12 inches (30 cm) of the bottom of the enclosures.

FIGURE11.

B. ALL AIR FROM OUTDOORS: (See Figures 12, 13 and 14)

The confined space shall be provided with two permanent openings, one commencing within 12 inches (30 cm) of the

top and one commencing within 12 inches (30 cm) from the bottom of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

FIGURE12.

When directly communicating with the outdoors, each opening shall have a minimum free area of 1 square inch per 4,000 Btu per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 12.

When communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 BTU per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 13.

FIGURE13.

When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch per 2,000 BTU per hour (11 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 14.

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 short side dimension of rectangular air ducts shall not be less than 3 inches (76.2 mm), see Figure 14.

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Maytag C3 manual ALL AIR from Inside Buildings

C3 specifications

The Maytag C3 is a cutting-edge kitchen appliance that has gained significant recognition for its innovative features and exceptional performance. Designed with the modern home chef in mind, the C3 epitomizes convenience, efficiency, and style.

One of the standout features of the Maytag C3 is its advanced cooking technology. The appliance utilizes a powerful convection cooking system that ensures even heat distribution, allowing for perfectly cooked meals every time. This technology not only improves the quality of cooking but also enhances the appliance's energy efficiency, making it an eco-friendly choice for households.

The Maytag C3 also boasts a user-friendly interface, equipped with a digital touchscreen control panel that simplifies the cooking process. This intuitive design allows users to easily browse through a variety of pre-programmed cooking settings, ensuring you have the right option for every dish you prepare. The appliance supports smart cooking, connecting to a mobile app that provides step-by-step guidance, recipe suggestions, and remote control functions.

In terms of capacity, the C3 is designed to accommodate large meals with ease. The spacious interior allows you to cook multiple dishes simultaneously, making it ideal for family gatherings or dinner parties. Additionally, the appliance is equipped with multiple cooking modes, including bake, broil, grilling, and roasting, giving users the versatility they need in the kitchen.

Another notable characteristic of the Maytag C3 is its durable construction. Built from high-quality materials, this appliance is designed to withstand the rigors of daily use. The stainless steel finish not only adds a touch of elegance to your kitchen but also makes cleaning a breeze. The removable racks and trays are dishwasher-safe, ensuring that upkeep is minimal.

Safety is also a priority with the Maytag C3. The appliance features a child lock system, preventing accidental operation, which is particularly valuable for families with young children.

In summary, the Maytag C3 is a remarkable kitchen appliance that combines advanced cooking technology with user-friendly features. Its spacious capacity, versatility in cooking modes, and durable construction make it an excellent choice for anyone looking to elevate their home cooking experience. Whether you are a seasoned chef or a novice in the kitchen, the Maytag C3 is designed to meet your culinary needs with style and efficiency.