ROYALTON® 80% AFUE Up/Horiz. Gas Furnaces w/ ECM Blower Motor

[tabby title=”Description”]When you consider a ROYALTON™ gas furnace, quality and value are a given. You’re getting peace of mind with great features and a smart design at an affordable price. The 80G1E series furnace is ideal for new or replacement residential or commercial installations. These 80% efficient single stage natural gas ready furnaces have a 33 in. tall cabinet, are available in upflow/horizontal models, and downflow models. The optional model 11K50 conversion kit is available for those needing to convert from natural gas to propane (LP gas). Features include an electronic hot surface igniter for increased safety and efficiency, maintenance free multi-speed high efficiency constant torque ECM blower motor, and self-diagnostic control module to monitor operation and simplify troubleshooting. The heat exchanger is constructed of tubular aluminized steel with crimped non-welded construction. Units are factory assembled, wired and tested to assure safe, dependable, and economic installation and operation. NOTE: Requires 1/2 in. input to gas valve, dedicated circuit breaker, and 120-Volt wiring with proper polarity and ground. Not certified for mobile home use. Not approved for installation in CA per new emissions standards.

10-Year Limited Parts Warranty*
Limited Lifetime Heat Exchanger Warranty*

WARNING: Cancer and Reproductive Harm –

*Please Note: To qualify for the extended 10-Year Limited Parts Warranty, the unit must be registered online at within 90 days of purchase for replacement or closing for new home construction. Otherwise, the standard 5-Year Limited Parts Warranty is in effect.

Tech Guide

Installation Manual

[tabby title=”Features”]

Natural gas ready and may be converted to LP gas with optional conversions kit, model 11K50

Upflow/horizontal design with compact cabinet height of 33 in. for flexible installation

Electronic hot surface ignition for increased efficiency and safety

Rotatable draft inducer for venting flexibility

Maintenance-free, multi-speed, permanently lubricated constant torque ECM blower motor

Built-in, high level self-diagnostics with fault code displays standard on integrated control module for reliable operation

Aluminized steel crimped non-welded clamshell heat exchanger

Equipment should be sized, selected and installed by a qualified professional to ensure proper installation, safe operation, adherence to federal, state and local codes and for valid warranty; see installation guide for more details

10 year limited parts warranty / lifetime heat exchanger warranty with online registration

Not Certified for Mobile Home use

Not Certified for use in California

[tabby title=”Sizing Guide”]


You can refer to an estimate or proposal from a local contractor, refer to the size of your existing system that you may want replaced, or use the sizing estimation chart provided on this page. Use the map to determine your Region based on the location of your home. Using the equipment charts, find your Region and go down the column to locate the range that covers the Square Footage of your home. Follow the row to the right to determine the recommended Furnace for your application.



Square Footage of Your Home Furnace Model
690-860 740-925 830-1035 1005-1260 1125-1410 80G1UH045AE12
860-1290 925-1390 1035-1555 1260-1885 1410-2110 80G1UH070BE12
1290-1720 1390-1855 1555-2070 1885-2515 2110-2815 80G1UH090BE16/CE20
1720-2145 1855-2315 2070-2590 2515-3145 2815-3520 80G1UH110CE20
2145-2575 2315-2780 2590-3105 3145-3770 3520-4225 80G1UH135DE20


NOTE: These tables an charts are intended to be used as a guideline only. The information is based on conventional window space (<15%), insulation and building construction. Only use these tables as a reference. When including a finished basement, use 1/2 of the finished basement square footage with the rest of the area being calculated.

[tabby title=”Models & Specs”]
80% AFUE Upflow/Horizontal Gas Furnace Models

Hamilton Model Number BTU Input/Output Dimensions H x W x D (in.) Available Tons Outlet Opening Weight (lbs.) Energy Guide
80G1UH045AE12 44,000 / 35,200 33 x 14.5 x 28.5 1.5 – 3.0 13 x 19.5 103 EnergyGuideIcon2
80G1UH070BE12 66,000 / 52,800 33 x 17.5 x 28.5 1.5 – 3.0 16 x 19.5 119 EnergyGuideIcon2
80G1UH090BE16 88,000 / 70,400 33 x 17.5 x 28.5 2.5 – 3.0 16 x 19.5 134 EnergyGuideIcon2
80G1UH090CE20 88,000 / 70,400 33 x 17.5 x 28.5 3.0 – 5.0* 19.5 x 19.5 144 EnergyGuideIcon2
80G1UH110CE20 110,000 / 88,000 33 x 21 x 28.5 4.0 – 5.0* 19.5 x 19.5 152 EnergyGuideIcon2
80G1UH135DE20 132,000 / 105,600 33 x 24.5 x 28.5 4.0 – 5.0* 23 x 19.5 170 EnergyGuideIcon2

*Please Note: 5 Ton/2000 CFM applications require two (2) side air returns.

Optional Furnace Accessories

Item No. Description Weight (lbs.)
11K50 LP (Propane) Conversion Kit for all Single Stage ROYALTON Gas Furnaces 1
RA 16 Return Air Drop Assembly (Upflow Applications Only) 50
WKDP 20 Universal Trim to Fit Plenum – 20″ x 20″ x 47″ (for Heat Only Applications) 28
1F78-15 5/2 Day Programmable Single Stage Heat/Cool Thermostat 1


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