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Lennox EL196UHE filter sizes: 16 x 25 x 1 and 20 x 25 x 1, as listed in the Lennox source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below.
Auto-extracted · review pending Filter sizes auto-extracted from the manufacturer document.
Last checked against the manufacturer document:
| Sizes found in the source table |
|---|
| 16 x 25 x 1 |
| 20 x 25 x 1 |
Extracted by script from the linked document. Read the excerpt to see which size applies to which cabinet or return.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Pull the old filter and read the size printed on its frame. Nominal sizes are rounded up: a 15.5 x 24.5 in. filter is sold as 16 x 25.
Your furnace manual lists the filter's dimensions, not its MERV rating. Higher-MERV filters restrict more air. Manufacturers such as Carrier recommend keeping the clean-filter pressure drop under 0.2 in. w.c. (ideally under 0.1). Lennox warns that an over-restrictive filter can trip the high limit in winter and freeze the coil in summer. If you want MERV 11–13, a 4-in. media cabinet is the usual route. Ask an HVAC tech to check static pressure. Nominal sizes are rounded: a filter labeled 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75.
Manufacturer document for Lennox EL196UHE
Last checked 2026-11-06. Manufacturers revise documents. If your unit's label disagrees, trust the label.
5 - If necessary, run the condensate line into a condensate TABLE 1
pump to meet drain line slope requirements. The
Furnace Filter Size
pump must be rated for use with condensing
furnaces. Protect the condensate discharge line Cabinet Width Side Return Bottom Return
from the pump to the outside to avoid freezing. 17-1/2” 16 X 25 X 1 (1) 16 X 25 X 1 (1)
6 - Continue with exhaust, condensate and intake piping 21” 16 X 25 X 1 (1) 20 X 25 X 1 (1)
installation according to instructions.
Duct System
INTAKE PIPE *GAS CONNECTION
Use industry-approved standards to size and install the
EXHAUST PIPE
supply and return air duct system. “Figure 20” shows the
correct supply and return duct installation. Refer to ACCA
*Gas connector may be Manual D. This will result in a quiet and low-static system
used for Canadian
that has uniform air distribution.
able by local authority
having jurisdiction. NOTE - This furnace is not certified for operation in heat-
ing mode (indoor blower operating at selected heating
speed) with an external static pressure which exceeds 0.5
inches w.c. Operation at these conditions may result in
improper limit operation.
Supply Air Plenum
RAISED
SERVICE PLATFORM PLATFORM If the furnace is installed without a cooling coil, a remov-Lennox EL196UHE filter sizes: 16 x 25 x 1 and 20 x 25 x 1, as listed in the Lennox source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below. 16 x 25 x 1; 20 x 25 x 1.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Filter sizes are nominal (rounded). A filter sold as 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75 in. Buy by the nominal size printed on the frame.
Every size found in the source table is 1 in. thick: 16 x 25 x 1 and 20 x 25 x 1. Pending human review; check the excerpt.
Manufacturer document for Lennox EL196UHE (https://www.lennox.com/dA/77ba4690a5/507764-06g.pdf), last checked 2026-11-06.