Removing the Bottom Panel

Remove the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall the bottom cap. See figure 10.

Screw

Bottom Cap

Bottom Panel

FIGURE 10

	Horizontal Application
	Installation Clearances
	Top
Left		FLOW	Right
Left		AIR	Right
End			End
	Bottom
Vent Connector	Type C		Type B1
Type	Type C		Type B1
Type
Top	0		0
*Front	2-1/4 in. (57 mm)**		2-1/4 in. (57 mm)
Back	0		0

Ends	2 in. (51 mm)	2 in. (51 mm)

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

Floor	0‡	0‡

*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 single wall vent pipe is used.

‡For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring.

FIGURE 11

Horizontal Applications

The EL180UHE furnace can be installed in horizontal ap plications. Order horizontal suspension kit (51W10) from Lennox, or use equivalent suspension method.

Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum clearances for closet or al cove installations are shown in figure 11.

This furnace may be installed in either an attic or a crawl space. Either suspend the furnace from roof rafters or floor joists, as shown in figure 12, or install the furnace on a platform, as shown in figure 13.

Typical Horizontal Application

Unit Suspended in Attic or Crawlspace

Metal

Strap

Bracket

3/16”

Air

Flow

FIGURE 12

NOTE - Heavy-gauge perforated sheet metal straps may be used to suspend the unit from roof rafters or ceiling joists. When straps are used to suspend the unit in this way, support must be provided for both the ends. The straps must not interfere with the plenum or exhaust pip ing installation. Cooling coils and supply and return air plenums must be supported separately.

NOTE - When the furnace is installed on a platform in a crawlspace, it must be elevated enough to avoid water damage and to allow the evaporator coil to drain.

Return Air -- Horizontal Applications

Return air must be brought in through the end of a furnace installed in a horizontal application. The furnace is equipped with a removable bottom panel to facilitate installation. See figure 10.

Page 10

EL180UHE specifications

Lennox International Inc. has long been a leader in providing innovative heating and cooling solutions, and the EL180UHE represents a notable advancement in their line of high-efficiency gas furnaces. Designed to meet the demands of residential heating, this unit combines advanced technology with user-friendly operation and significant energy savings.

One of the standout features of the EL180UHE is its efficiency rating, with an Annual Fuel Utilization Efficiency (AFUE) of up to 80%. This high efficiency not only helps homeowners save on energy bills but also reduces their carbon footprint. The furnace is equipped with a reliable, multi-speed blower motor, which enhances comfort levels by maintaining consistent air circulation throughout the home.

The EL180UHE employs advanced combustion technologies, such as Lennox's low-NOx burner, which minimizes nitrogen oxide emissions, contributing to a cleaner environment. The unit is also designed with a sealed combustion system that draws air directly from the outdoors rather than from inside the home, leading to improved indoor air quality and increased safety.

Another significant characteristic of the EL180UHE is its whisper-quiet operation. This is achieved through well-engineered insulation and a design that minimizes noise levels, allowing for a comfortable living environment without disruptive sounds. Many homeowners appreciate the quiet performance, especially during the night or in spaces where noise is a concern.

The installation process is straightforward, supported by Lennox's user-friendly design. The EL180UHE is compatible with various home configurations and can easily integrate with existing HVAC systems. Additionally, it has a compact footprint, making it suitable for homes with space constraints.

Further enhancing its appeal, this gas furnace features robust warranty options, reflecting Lennox's commitment to quality and customer satisfaction. Homeowners can rest assured that they are investing in a durable product that has been built to last.

In conclusion, Lennox International Inc.'s EL180UHE gas furnace exemplifies the company's dedication to innovation, efficiency, and reliability in home heating solutions. With its high AFUE rating, advanced combustion technology, quiet operation, and user-friendly design, the EL180UHE is an excellent choice for homeowners looking to enhance their comfort while minimizing energy costs.