Furnace Doors

4×10 Observation Door

Our access doors and observation doors combine strength with adaptability by using a variety of materials and offering custom sizes for the best fit on your equipment. Our designs allow for easy upgrades, providing for long term serviceability.

Direct Replacement and Custom Sizes

R-V offers direct replacements and custom sizes for our full line of furnace, pulverizer, duct and windbox doors to make for an easy transition onto your pulverizer or windbox. If you have not already taken advantage of R-V’s engineering designs, our products can directly replace many OEM designs and our styles are adaptable to any OEM boiler design. All furnace doors are available with seal boxes and tube panels as an option.

Unique Furnace Combination
Observation and Access Door


Showcasing our unique manufacturing capabilities, we offer custom doors as well as a number of features to ensure the optimal product. Both observation and access doors have the option of left or right hand openings. To make the direct replacement process efficient, refractery lined stainless steel retainers are available to maintain existing doors.

Furnace Door Sizes and Styles

Furnace Door Sizes and Styles

Observation Doors  

  • 4″ x 10″ and 6″ x 12″ 
  • 5 1/2″ diameter
  • 3″ and 6″ diameter for pressurized furnaces

Access Doors  

  • 15″ x 21″ oval
  • Water-cooled
  • Non-insulated
  • Mineral wool or refractory insulated
  • Windbox
  • Pulverizer (pictured to the left)

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