Lennox Hearth L20 BF-2 Vertical Termination with no Offsets, Vertical Termination With 2 Offsets

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INSTALLATION - MODEL L20 DVF-2 (DIRECT-VENT) VENTING REQUIREMENTS.

This appliance is designed to be vented with a 4” x 6 5/8” direct-vent pipe. Each direct-vent appliance must use its own separate vent system.

VERTICAL TERMINATION WITH NO OFFSETS

Min. Vertical Pipe Length: 5 feet

Max. Vertical Pipe Length: 25 feet

5 Feet

Min.

25 Feet

Max.

VERTICAL TERMINATION

WITH 2 OFFSETS

Min. Vertical Pipe From Appliance to first offset: 2 feet.

Min. Total Vertical Pipe Length: 5 feet

Max. Total Vertical Pipe Length: 25 feet

For every 1 feet of vertical pipe (from unit to first offset), 2 feet of horizontal run is allowed (not to exceed 12 ft.

Example – with a 6’ ver- tical pipe off unit, 12’ of horizontal run is allowed.

At 2’ Min. Vertical, 2’ Max.

Horizontal is allowed.5 Feet Min.

25 Feet

Max.

* 2 Feet Min.

Horizontal runs require ¼” rise per foot.

HORIZONTAL TERMINATION

WITH 1 OFFSET

Min. Vertical Pipe From Appliance to offset: 2 feet.

Max. Vertical Pipe Length: 25 feet

12 Feet Max.

 

 

For every 1 feet of vertical

 

 

pipe (from unit to first offset),

 

 

2 feet of horizontal run is

 

 

allowed (not to exceed 12 ft.

 

 

Example – with a 6’ ver-

 

 

tical pipe off unit, 12’ of

 

 

horizontal run is allowed.

 

 

 

 

25

 

 

 

 

At 2’ Min. Vertical, 2’ Max.

Feet

 

Horizontal is allowed.

 

Max.

 

 

 

 

 

 

* 2 Feet Min.

Wall

Penetration

Detail

Maximum total offsets allowed: Not to exceed 180 degrees.

Maximum allowable horizontal pipe run is 12 feet.

With 2 feet of vertical pipe installed from the appliance (* see note), a 2 foot maximum horizontal run allowed. For installations with more than 2 feet of vertical pipe, calculate allowable horizontal run as indicated in applicable illustration above.

See page 10 for Vent Termination Requirements.

Also see pipe manufacturers instructions for additional vent installation requirements. Horizontal vent clearances: 3“ minimum top 1“ minimum on bottom and sidewalls. Vertical vent clearances: 1” minimum.

Install vent support brackets every 4 feet of vertical pipe unless otherwise specified by vent manufacturer.

*Note: If using Propane Gas (LP), it may be necessary to install (as a minimum) 3 feet of vertical pipe from the appliance prior to an offset to ensure optimum product performance. This may be necessary due to variations in vent configuration and other numerous fac- tors which affect exhaust flow and air delivery such as BTU value, ambient temperature, wind conditions, altitude, etc.

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Contents Retain this Manual for Future Reference Freestanding Vented GAS Fired Room Heaters775,021M Rev. C, 8/04 Important Warnings / Cautions Table of Contents LOW High Planning Your InstallationLocal and National Code Requirements Tool / Equipment ListQuestions to ASK the Local Building Official Corner Manufactured Mobile Home RequirementsImportant Notes Rear Wall or AlcoveVertical Termination With 2 Offsets Vertical Termination with no OffsetsHorizontal Termination With 1 Offset Direct Vent System Components Model L20 DVF-2 only InstallationSV4MCK Installation Model L20 DVF-2 onlyCony Model L20 BF-2 only Vent Configuration RequirementsFor vent termination requirements, see GAS Supply Hookup ALL Models Pressure TestingSupply Line Size Requirements Door Operation ALL Models Installing LOG SET GAS Appliance Final Assembly ALL ModelsGlowing Embers Verify that the gas line has been purged of air Installation Check List ALL ModelsLighting and Shutdown Instructions ALL Models For Your Safety Read Before LightingCare and Operation Gas Control KnobsCombustion Chamber Relief Door ALL Models BREAK-IN PeriodCirculation Blower Operation Canada Parts ListPropane Conversion Procedure Propane ConversionBurner Flame Appearance Reference InformationMaintenance Pilot Flame Appearance Air Shutter AdjustmentALL Models Periodic Check of Pilot and Burner Flames Cycle unit a minimum of 2 timesGAS Control and Safety System Wiring Diagram Wiring DiagramsModel L20 BF-2 Model L20 DVF-2 ALL Models Troubleshooting Qualified Technicians OnlyTroubleshooting Check List Qualified Technicians Only Model L20 BF-2 only Spill SwitchSpillage Test Procedure Item # Catalog # Description Where Used Replacement Parts Models L20BF-2 & L20 DVF-2Item # Catalog # Model Description Optional Accessories Models L20BF-2 & L20 DVF-2Top View Side View Specifications Model L20 BF-2Specifications Model L20 DVF-2 SAFETY/ Listing Label Rating Plate SAFETY/ Listing Label Rating Plate Ownership Records Service and Maintenance LOG775,021M REV. C 08/2004

L20 DVF-2, L20 BF-2 specifications

The Lennox Hearth L20 DVF-2 and L20 BF-2 are two innovative gas fireplaces that offer modern heating solutions for homes looking to combine functionality, style, and efficiency. Both models are designed with advanced technology to deliver reliable performance and aesthetics that enhance any living space.

The L20 DVF-2 is a direct vent fireplace that utilizes a sealed combustion system, allowing it to operate efficiently without drawing air from the room. This feature not only improves energy efficiency but also helps maintain indoor air quality since outside air is used for combustion. One of its standout features is the ability to provide a range of heat output options, allowing homeowners to adjust the warmth to their preference. The fireplace comes with a convenient remote control, enabling effortless operation from anywhere in the room.

The L20 BF-2, on the other hand, is a conventional vent fireplace, offering a different installation option ideal for various home designs. Similar to the DVF-2, the BF-2 model provides a wide range of heat output, ensuring comfort in chilly conditions. It features a striking design with a large viewing area, allowing for a mesmerizing flame display that serves as a focal point in any room.

Both models are equipped with Lennox's patented Powerflow technology, which optimizes heat distribution throughout the space. This technology not only enhances comfort but also ensures that energy is used efficiently. The fireplaces also feature easy-to-use controls and customizable flame height settings, giving users precise control over their heating experience.

In terms of design, the L20 DVF-2 and L20 BF-2 come in various finishes and styles, allowing them to seamlessly blend with different home aesthetics. Their sleek and contemporary appearance complements modern interiors, while still fitting into more traditional décor in subtle ways.

Overall, the Lennox Hearth L20 DVF-2 and L20 BF-2 provide effective heating solutions paired with advanced technologies and stylish designs. Whether a homeowner desires a direct vent option or a traditional vent fireplace, both models deliver energy-efficient performance, exceptional heat distribution, and a stunning flame display that can enhance the ambiance of any living space. These fireplaces are not just heating appliances; they are an investment into comfort and elegance for years to come.