Use and Care Guide

Use the map above to determine your region and compare to the chart below to find your application size.
92.1% AFUE KG7SC Series Gas Furnace (Upflow/Horizontal) Selection
Region 1 Region 2 Region 3 Region 4 Region 5
Furnace BTU Input Size
685-855 735-925 825-1030 1000-1250 1120-1400
855-1215 925-1310 1030-1465 1250-1775 1400-1990
1215-1610 1310-1740 1465-1940 1775-2360 1990-2640
1610-2020 1740-2180 1940-2435 2360-2960 2640-3310
2020-2415 2180-2605 2435-2915 2960-3535 3310-3960
2415-2695 2605-2905 2915-3250 3535-3945 3960-4415
Residential Sizing: The table and charts are intended to be used as a guideline for Residential applications only.
The information is based on conventional window space (<15%), insulation and building construction (8 ft.
ceiling height). When including a finished basement, use 1/2 of the finished basement square footage with
the rest of the area being calculated.
Mobile/Manufactured Home Sizing: Refer to the Date Plate located in the electrical box or kitchen cabinets. For
further assistance, call Hamilton's customer service department [phone].
Equipment Sizing Guide
Square Footage
38,000 BTU
54,000 BTU
72,000 BTU
90,000 BTU
108,000 BTU
120,000 BTU