Lennox CHX35-48B-6F 17.5" Width 48,000 BTU Coil

The Lennox CHX35-48B-6F is a cased horizontal evaporator coil for 3.5 to 4 ton R-410A systems, with a factory-installed check/expansion valve. It fits a 17.5-inch B cabinet Lennox furnace, and Lennox sells CHX35 coils in the US for repair and replacement only, not for new system installs.

Key specs

• Capacity: 3.5 to 4 tons nominal
• Refrigerant: R-410A, check/expansion valve installed at the factory
• Cabinet: B size, 17.5 inches, 31.5 inches long
• Connections: 7/8-inch suction and 3/8-inch liquid, sweat, plus two 3/4-inch FPT condensate drains
• Construction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins

Reading the model number

CH is a horizontal indoor coil, X is R-410A, and 35 is the series. 48 is the 3.5 to 4 ton size, B is the 17.5-inch cabinet that matches B furnaces, 6 is the factory check/expansion valve, and F means cased. Lennox adds a minor revision number after the 6F on the unit label.

What it pairs with

It lines up with Lennox furnaces that carry the B cabinet letter. It has to connect to an R-410A outdoor unit. The air conditioners and heat pumps we sell use R-454B, so this coil is for keeping an existing R-410A system running.

Sizing and fit

Choose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. Right-hand airflow needs a field-built 6-inch spacer between the furnace and the coil. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.

Warranty and registration

HVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.

Shipping and help

It ships from our Kansas City warehouse to the lower 48 states and D.C. It ships free when your cart also has an item that ships free, except to Washington, Oregon, and Idaho. For Alaska, Hawaii, Puerto Rico, other U.S. territories, or an APO or FPO address, call or text us for a quote. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.