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Williams 5009821
Williams 5009821
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Williams 5009821
Williams 5009821

Williams Monterey PLUS - 50K BTU - Gas Top-Vent Wall Furnace - LP - 70% AFUE - Double-Sided



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Was $1,049.00
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Williams Monterey PLUS - 50K BTU - Gas Top-Vent Wall Furnace - LP - 70% AFUE - Double-Sided
Williams Monterey PLUS - 50K BTU - Gas Top-Vent Wall Furnace - LP - 70% AFUE - Double-Sided
Model: 5009821
Was $1,049.00
Product Q&A
How-To Articles

Recommended Accessories

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Expert Recommended Accessories Selected by Bob, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10


    The Williams Monterey PLUS+ Wall furnace is an ideal solution for you space heating needs. The patented side relief draft hood design reduces heat loss and ensures that you spend less and stay more comfortable. Whether recessed into the wall or surface mounted using the optional free standing kit, the soft-white powder coated finish provides a discrete durable finish that blends into any home's decor.
  • Safe Pilot Ignition
  • With matchless pilot ignition, the guess work is taken out of lighting the furnace. By sealing the pilot and ignitor away from dirt and debris, the electronic igniter lights the furnace safely and reliably.
  • Power Free Operation
  • A lot of things can go wrong during a power outage, but your furnace shutting off is not one of them. It will continue to work even when you lose power.
  • Efficient Draft Hood Design
  • The side-relief opening draft hood is designed to pull draft air from the sides of the furnace to limit heat loss through the chimney.
  • Vent Limit Safety Switch
  • The vent limit safety switch is equipped on all Monterey PLUS furnaces. This turns off the unit in case the chimney is blocked, protecting your family from carbon monoxide and fires.
  • Optional Blower
  • An optional blower offering manual or automatic operation is available. This improves circulation of the warm air and reduces temperature differences throughout the room.
  • Dual Room Heating
  • Install the furnace in the wall between rooms and enjoy heat in both rooms with one unit.
  • High Efficiency
  • With a 78% thermal efficiency rating, the Monterey PLUS provides high efficiency heating.
  • Product Note
    A thermostat does not come included with this unit. The Williams P322016 thermostat is compatible and can be found under the "Accessories" tab. Alternatively, any standard millivolt thermostat can be used.
California residents see
Warning: This product can expose you to chemicals including Epichlorohydrin which is known to the State of California to cause Cancer.
For more information go to: www.p65Warnings.ca.gov


specs product image PID-67977
General Information
Gas Wall Furnace
Product Line
Monterey PLUS
Fuel Type Learn More
Liquid Propane
Vent Type Learn More
Chimney Vent
Modulating/Staging Learn More
Single Stage
Blower Motor
Mount Type
Gas Conversion Kit
AFUE Learn More
70 %
Heating BTU
High Fire Input
50000 BTU
High Fire Output
38000 BTU
Gas Connection Size
1/2 Inch
Product Height
65 3/4 Inches
Product Width
16 Inches
Product Depth
6 Inches
Product Weight
127 Pounds
Shipping Weight
137 Pounds
CSA Listed
Warranty Information
Parts Warranty Learn More
1 Year
Heat Exchanger Warranty
Limited 10 Years


Williams 5009821 Reviews & Ratings

Product Q&A

Product Questions Answered by Bob, the Heating Product Expert
Is this heater comparable with a Nest or similar remote thermostat?
from California 
March 05, 2019

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Williams Monterey PLUS - 50K BTU - Gas Top-Vent Wall Furnace - LP - 70% AFUE - Double-Sided
Williams 5009821
Williams 5009821
Williams 5009821
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