Use and Care Guide

Use the map above to determine your region and compare to the chart below to find your application size.
95% AFUE KG7SD Series Gas Furnace (Upflow/Horizontal) Selection
Region 1 Region 2 Region 3 Region 4 Region 5
705-880 765-950 855-1060 1035-1290 1160-1445
880-1250 950-1350 1060-1510 1290-1830 1445-2050
1250-1665 1350-1800 1510-2010 1830-2445 2050-2735
1665-2085 1800-2250 2010-2515 2445-3055 2735-3420
2085-2500 2250-2700 2515-3020 3055-3665 3420-4105
2500-2780 2700-3000 3020-3353 3665-4070 4105-4560
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
Furnace BTU Input Size
38,000 BTU
54,000 BTU
72,000 BTU
90,000 BTU
108,000 BTU
Square Footage
120,000 BTU