Vent Terminations

Category I double wall vent (or equivalent) connectors and sized according to vent sizing tables (FAN column) in the latest edition of the National Fuel Gas Code.

The Category I vent and accessories, such as firestop spacers, thimbles, caps, etc., must be installed in accordance with the vent manufacturer’s listing. The vent connector and firestop must provide correct spacing to combustible surfaces and seal to the vent connector on the upper and lower sides of each floor or ceiling through which the vent connector passes.

Any improper operation of the common venting system in an existing building should be corrected when new equipment is installed, so the installation conforms to the latest edition of the National Fuel Gas Code, ANSI Z223.1.

When resizing any portion of the common venting system, it should be resized to approach the minimum size as determined using the appropriate tables in the National Fuel Gas Code.

The weight of the venting system must not rest on the water heater. The venting system must be adequately supported in compliance with local codes and other applicable codes.

The vent terminal should be vertical and exhaust outside the building at least 2 feet (0.6 m) above the highest point of the roof when within a 10 foot (3.05 m) radius.

Additionally, vertical terminations must be a minimum of 3 feet (0.9 m) above the roof line, and when less than 10 feet (3.05 m) from a parapet wall must be a minimum of 2 feet (0.61 m) higher than the parapet wall.

Vent caps should have a minimum clearance of 4 feet (1.2 m) horizontally from, and in no case above or below [unless a 4 feet (1.2 m) horizontal distance is maintained], electric meters, gas meters, regulators and relief equipment.

Maintain a distance of at least 3 feet

(0.9 m) above any forced air inlet within

10 feet (3.05 m) and a distance of at least 4 feet (1.2 m) below, 4 feet (1.2 m) horizontally from, or 1 foot (30 cm) above any door, window or gravity air inlet.

Do not terminate the vent in a window well, stairwell, alcove, courtyard or other recessed area. The vent can not terminate below grade. The bottom of the vent terminal shall be located at least 12 inches (30 cm) above grade and clear of snow, ice, leaves or other debris.

The distance of the vent terminal from adjacent public walkways, adjacent buildings, windows, and building openings

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CW 645, CW 745 specifications

The Lochinvar CW 645 and CW 745 are advanced water heater models from Lochinvar, a leading manufacturer of water heating solutions. These high-efficiency units are designed to meet the demands of both commercial and residential applications, combining cutting-edge technology with robust performance.

One of the defining features of the CW series is its commitment to energy efficiency. With their stainless steel construction, these water heaters boast a high thermal efficiency rating. The CW 645 and CW 745 utilize modulating technology, allowing them to adjust the heating output based on real-time demand. This results in reduced energy consumption and lower operational costs, making them an ideal choice for environmentally conscious consumers.

These models are equipped with a powerful burner system designed to provide optimal heating performance. The burners are engineered for reliability and longevity, ensuring consistent hot water supply even under heavy usage. Additionally, the CW 645 and CW 745 feature a compact footprint, making them suitable for installation in tight spaces or areas with limited access.

The advanced control system in these units takes user experience to the next level. With intuitive controls and a digital display, users can easily set temperatures and monitor system performance. The integrated diagnostics feature ensures quick troubleshooting, enhancing reliability and reducing maintenance time.

Safety is another paramount consideration in the design of the CW series. Both models come equipped with multiple safety features, including a flame safeguard system and a high-temperature limit switch. These safety mechanisms provide peace of mind while ensuring compliance with local building codes.

Furthermore, the CW 645 and CW 745 models are versatile in their applicability. They can be used for a variety of applications including restaurants, schools, and hospitals. Their ability to provide consistent hot water makes them particularly valuable in high-demand situations.

In summary, the Lochinvar CW 645 and CW 745 are exceptional water heating solutions that epitomize efficiency, safety, and performance. With advanced features, user-friendly controls, and solid construction, these units are well-suited to meet the hot water needs of both commercial and residential users. Investing in a CW series water heater not only secures a reliable source of hot water but also contributes to long-term energy savings and environmental sustainability.