America's Heating & Cooling Store, Est 2002
Free Shipping
See Details
My Location:
Chicago, IL

14,000 BTU, 76% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

14,000 BTU, 76% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

Model: Williams 1403821

  • + 16 More
Mouse over or pinch image to zoom in.
Actual product may vary from photos.

Model: Williams 1403821

You save: 26%
Compare to: $1,120.49
Or as low as
Volume Discounts
In Stock and Ready to Ship
If ordered by 1PM CST M-F, ships same day. All items on your order must be in stock for same-day shipping.

IMPORTANT: As of 2019, Williams no longer offers high-altitude models.  If you live above 2000 feet, be sure to purchase the high altitude kit listed in Accessories.  The kit contains a selection of orifices that cover elevations up to 8,000 feet.


Attractive styling, economical and safe heating comfort is achieved with this popular home furnace. Compact, space saving direct-vent heaters feature low cost installation and come equipped with all vent material. Heat only the room you're in while saving fuel costs in unused areas. This furnace's design features a sealed combustion chamber, making it great for garage or workshop heating. No electricity required, great during power outages. It is direct vented with a "Matchless" pilot igniter, automatic thermostat and safety controls included. Unit comes from factory set up for LP.


Important Safety Notice:  The surface temperature of wall furnaces can exceed 200 degrees Fahrenheit. Avoid touching the furnace while it is in use. If children will be present, provide a physical barrier to prevent accidental contact with the furnace.

Please read this additional Important Safety Notice.

Standard Features

  • No electricity required
  • "Matchless" pilot igniter
  • Easy installation - all vent material included
  • All vent caps include built-in "Bird Guard"
  • Long-life, creamic-coated combustion chamber
  • Automatic temperature and safety controls
  • Sealed combustion chamber requires no room air
  • Attractive, durable, soft-white, scratch-resistant finish


Please note: a thermostat does not come with this unit; you can buy the thermostat separately under part number P32662016. Alternately, any standard millivolt thermostat can be used. 


0-2000 ft.
Heating Capacity
14000 BTU
Effective Heating Capacity (BTUs)
73 %
Efficiency (% AFUE)
65 %
Electrical Requirements
None (Self-Generating)
Fuel Type
Liquid Propane
Ignition Type
Matchless Pilot
Equipment Type
Wall Furnace
Exhaust Venting
Maximum Wall Thickness
24 inches
Product Weight
56 lbs
18 Inches
7.125 Inches
26.75 Inches
Heat Exchanger Warranty
10 Years
Parts Warranty
1 Years
Combustion Chamber Warranty
10 Years

Enjoy free shipping on any accessories purchased with the Williams 1403821.

Air Boosters
Tjernlund AS1
75 CFM Room-to-Room Ventilator, 120 VAC Hardwired
Digital Thermostats
Honeywell TH6110D1005
FocusPro 6000 Universal Programmable Thermostat - One Stage Heat One Stage Cool (Standard Screen)
Honeywell TH5110D1006
FocusPro 5000 Universal Non-Programmable Thermostat - One Stage Heat One Stage Cool (Standard Screen)
Furnace High Altitude Adapter Kits
Williams 8A144
High Altitude Conversion kit - 2001' - 8000' for Direct-Vent Gravity 14,000 Btu/hr. LPG Furnace
Wall Furnace LP Conversion Kits
Williams 8942
Natural Gas Conversion Kit for Williams 14038 Direct-Vent Furnace
Wall Furnace Venting Products
Williams 2303
High Capacity 125 CFM Blower Assembly for Williams 1403622
© Copyright 2002-2021, Alpine Home Air Products