5 - Theentirelengthofsinglewallmetalventconnector shallbe readilyaccessiblefor inspection,cleaning, andreplacement.

6 - Singleapplianceventingconfigurationswithzerolat- erallengths(tables3and4)areassumedto haveno elbowsintheventsystemForallotherventconfigura.- tions,theventsystemisassumedtohavetwo90°el- bows.Foreachadditional90°elboworequivalent(for exampletwo45°elbowsequalone90°elbow)beyond two,themaximumcapacitylistedintheventingtable shouldbereducedby10%(0.90x maximumlistedca- pacity).

7 - Thecommonventingtables(5,6,7,and8)weregen- eratedusinga maximumhorizontalventconnector

lengthof 1-1/2feet(.46m)foreachinch(25mm)of connectordiameterasfollows:

TABLE 2

Connector Diameter

Maximum

Horizontal

inches (mm)

Connector

Length feet (m)

3 (76)

4-1/2

(1.37)

4 (102)

6

(1.83)

5 (127)

7-1/2

(2.29)

6 (152)

9

(2.74)

7 (178)

10-1/2

(3.20)

_ If the common vertical vent is offset, the maximum common vent capacity listed in the common venting tables should be reduced by 20%, the equivalent of two 90° elbows (0.80 x maximum common vent capacity). The horizontal length of the offset shall not exceed 1-1/2 feet (.46 m) for each inch (25 mm) of common vent diameter.

9 - The vent pipe should be as short as possible with the least number of elbows and angles required to com- plete the job. Route the vent connector to the vent us- ing the shortest possible route.

10 - A vent connector shall be supported without any dips or sags and shall slope a minimum of 1/4 inch (6.4 mm) per linear foot (305 mm) of connector, back toward the appliance.

11 - Vent connectors shall be firmly attached to the furnace flue collar by self-drilling screws or other approved

means, except vent connectors of listed type B vent material which shall be assembled according to the manufacturer's instructions. Joints between sections of single wall connector piping shall be fastened by screws or other approved means.

12- When the vent connector used for Category I ap- pliances must be located in or pass through a crawl- space or other areas which may be cold, that portion of the vent connector shall be constructed of listed double-wall type B vent material or material having equivalent insulation qualities.

13 - All venting pipe passing through floors, walls, and ceil- ings must be installed with the listed clearance to com- bustible materials and be fire stopped according to lo- cal codes. In absence of local codes, refer to NFGC (Z223.1).

14 - No portion of the venting system can extend into, or pass through any circulation air duct or plenum.

15 - Vent connectors serving Category I appliances shall not be connected to any portion of mechanical draft systems operating under positive pressure such as Category III or IV venting systems.

16 - If vent connectors are combined prior to entering the common vent, the maximum common vent capacity listed in the common venting tables must be reduced by 10%, the equivalent of one 90° elbow (0.90 x maximum common vent capacity).

17 - The common vent diameter must always be at least as large as the largest vent connector diameter.

18 - In no case, shall the vent connector be sized more than two consecutive table size diameters over the size of the draft hood outlet or flue collar outlet.

19 - Do not install a manual damper, barometric draft regu- lator or flue restrictor between the furnace and the

chimney.

20 - When connecting this appliance to an existing dedi- cated or common venting system, you must inspect the venting system's general condition and look for signs of corrosion. The existing vent pipe size must conform to these instructions and the provided venting tables for the USA, and the appropriate venting tables in the standards of CSA B149 Natural Gas and Propane Installation Codes for Canada. If the existing venting system does not meet these requirements, it must be resized.

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Lennox International Inc G50UH-60C-110, G50UH-48C-110, G50UH-60D-135, G50UH-36C-110 Maximum Horizontal Inches mm
Page 14 Page 16

G50UH-60D-155, G50UH-36B-090, G50UH-36A-070, G50UH-24A-045, G50UH-60D-135 specifications

Lennox International Inc is renowned for its high-quality heating, ventilation, and air conditioning (HVAC) solutions. Among its versatile product lineup are the G50UH series of gas furnaces, which exemplify efficiency and performance. These models, specifically the G50UH-24A-070, G50UH-24A-045, G50UH-36B-090, G50UH-36A-070, and G50UH-48C-135, offer a range of features tailored to meet varying residential heating demands.

One of the key features of the G50UH series is its energy efficiency. Many models in this lineup boast an impressive Annual Fuel Utilization Efficiency (AFUE) rating, which indicates their ability to convert fuel into usable heat efficiently. These high AFUE ratings can lead to significant savings on energy bills, making these furnaces a cost-effective choice for homeowners.

The G50UH series incorporates advanced technology, including multi-speed blowers that enhance comfort levels. This feature allows for better airflow control and can help maintain consistent temperatures throughout the home. The controlled airflow reduces temperature swings and ensures that every room benefits from the heating provided by the furnace.

Safety is paramount in Lennox designs, and the G50UH series is no exception. Each unit is equipped with safety features designed to protect both the furnace and the home. Dual certification ensures that the products meet stringent safety standards. Moreover, features like a self-diagnostic control board streamline maintenance, allowing homeowners to easily identify potential issues.

Another important characteristic of the G50UH series is its compact design, which is beneficial for homes with limited space. The units are designed to fit comfortably in various installation environments, from basements to utility rooms.

Durability is another hallmark of the G50UH furnaces. Constructed with quality materials, these units are designed for long-term reliability. This ensures that homeowners can enjoy the comfort of their heating systems without frequent repairs.

Lastly, Lennox provides extensive support and warranties, giving homeowners peace of mind associated with their purchase. With options tailored to meet diverse home heating needs, the Lennox G50UH series stands out in the HVAC market, combining efficiency, safety, and reliability in one impressive package.
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