Lennox GCS16 Furnace Overview

The LENNOX GCS16 is a natural gas-burning warm air furnace with an efficiency that ranges from 78.2 – 81% AFUE.

Furnace Filters for the Lennox GCS16

Air Flow Configuration Cabinet Width Filters
Downflow / Horizontal 17-1/2" 1 16x25x1
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Downflow / Horizontal 21" 1 20x25x1
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Lennox GCS16 Model Numbers

The GCS16 is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
GCS16-060-120* 80 120,000
GCS16-1353-270* 0 270,000
GCS16-1603-270* 0 270,000
GCS16-413-100* 81 100,000
GCS16-513-125* 78.5 125,000
GCS16-653-125* 78.5 125,000
GCS16-953-200* 78.2 200,000

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