Filters

Front	Horizontal
	Back

FIGURE 12

Downflow Application

Allow for clearances to combustible materials as indicated

on the unit nameplate. Minimum clearances for closet or al- cove installations are shown in figure 13.

Downflow Application Installation Clearances

Top

Left Side

Right Side

Bottom

Type of Vent	Type C	Type B1
Connector	Type C	Type B1
Connector


Top	1 in. (25 mm)	1 in. (25 mm)

*Front	2−1/4 in. (57 mm)**	2−1/4 in. (57 mm)

Back	0	0

Sides	0†	0

Vent	6 in. (152 mm)	1 in. (25 mm)

Floor	NC††	NC††

*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. ** 4−1/2 in. if a single wall vent pipe is used.

†Left side requires 3 in. if a single wall vent is used on 14 −1/2 in. cab- inets, or 2 in. if a single wall vent is used on 17 − 1/2 in. cabinets. ††The furnace may be installed on a combustible wood floor if an optional additive base is installed between the furnace and the combustible floor.

WARNING

Improper installation of the furnace can result in per- sonal injury or death. Combustion and flue products must never be allowed to enter the return air system or the living space. Use screws and joint tape to seal the return air system to the furnace.

In platform installations with bottom return air, the furnace should be sealed airtight to the return air ple- num. A door must never be used as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Al- low absolutely no sagging, cracks, gaps, etc.

The return and supply air duct systems must never be connected to or from other heating devices such as a fireplace or stove, etc. Fire, explosion, carbon monoxide poisoning, personal injury and/or proper- ty damage could result.

This unit is not equipped with a filter or rack. A field−pro-

vided high−velocity filter is required for the unit to operate properly. Table 3 lists recommended filter sizes.

A filter must be in place any time the unit is operating.

	TABLE 3

Cabinet Width		Return Air Filter Size (inches)


A (14−1/2")		14 x 25 x 1 (1)
B (17−1/2")		16 x 25 x 1 (1)
C (21")		20 x 25 x 1 (1)

FIGURE 13

Page 10

EL280DF specifications

Lennox International Inc. has been a leader in the HVAC (Heating, Ventilation, and Air Conditioning) industry for decades, consistently delivering high-quality and energy-efficient products. Among their lineup, the Lennox EL280DF Gas Furnace stands out as an excellent option for homeowners seeking reliable heating solutions.

The EL280DF is a two-stage gas furnace that offers improved efficiency and comfort, making it an ideal choice for moderate climates. One of the main features of the EL280DF is its energy efficiency, boasting an AFUE (Annual Fuel Utilization Efficiency) rating of up to 80%. This means that a significant portion of the fuel consumed is converted into heating energy, resulting in lower energy bills and reduced environmental impact.

Another noteworthy characteristic of the EL280DF is its quiet operation. Equipped with advanced sound-dampening technologies, the furnace operates with minimal noise, ensuring that your home remains a serene environment. This is especially important during the colder months when the furnace is often in frequent use.

The EL280DF also employs a two-stage heating system, which allows it to operate at a lower capacity during milder temperatures and ramp up to full capacity during the coldest days. This feature not only enhances comfort by maintaining a more consistent temperature but also contributes to energy savings by reducing unnecessary energy consumption.

In terms of installation, the EL280DF is designed for flexibility. It can be configured for various types of homes and installations, making it suitable for both new constructions and system replacements. Its compact size allows it to fit in tight spaces, providing versatility in home design.

Moreover, the EL280DF is equipped with a durable heat exchanger that ensures longevity and reliability. Lennox has also included features like a self-diagnostic control board, making troubleshooting easier and enhancing the overall reliability of the system.

In conclusion, the Lennox EL280DF Gas Furnace is a remarkable combination of efficiency, quiet operation, and versatility. With its two-stage heating capabilities and advanced technologies, it stands as a solid choice for homeowners looking to invest in a durable and energy-efficient heating solution. Whether building a new home or upgrading an old system, the EL280DF promises comfort and reliability during the coldest months of the year.