Measurement Guide

Use the map above to determine your region and compare to the chart below to find your application size.
95% AFUE Gas Furnace (Multi-Positional) Selection
Region 1 Region 2 Region 3 Region 4 Region 5 Furnace Model
820-1025 885-1105 990-1235 1200-1500 1345-1680
95G2--045
1025-1510 1105-1630 1235-1825 1500-2215 1680-2480 95G2--070
1510-2075 1630-2235 1825-2500 2215-3035 2480-3400 95G2--090
2075-2560 2235-2765 2500-3088 3035-3750 3400-4200 95G2--110
2560-3075 2765-3315 3088-3706 3750-4500 4200-5040 95G2--135
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].
Square Footage
ROYALTON Equipment Sizing Guide