One Fireplace, Two looks

As part of the growing Opel family, the Keystone is the result of fine craftsmanship, inspired by versatility and built on more than 30 years’ of proven performance with high efficiency wood–burning fireplaces.

The Keystone name comes from the interchangeable keystone facing that is offered either as a semi-clean look or as a full faceplate, adding modern sophistication and design choices to any mid-sized space.

Low Emissions – High Performance

  • Semi-clean face option (requires two gravity vents for heat output)
  • Full Keystone facing for maximum impact
  • EPA Certified to comply with 2020 particulate emission standards at 0.7 g/hr. (with the 635cfm Central Heating Blower option)
  • Large 3.6 cubic feet firebox allowing overnight burns.
  • BTU Output range 10,000 to 70,000
  • Heating capacity up to 3000 ft2
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Opel Plus Keystone - One Fireplace, Two looks

Available Options

Opel+ Keystone Louver (Top)
The Top Louver for the Opel+ Keystone is a required option when the top louver is not blocked on the fireplace.
Gravity Vent Kit
The gravity vent kit uses natural convection to distribute the heat generated by the fireplace to the same floor and/or floors above the fireplace
Gravity Vent Kit - Rectangular
The gravity vent kit uses natural convection to distribute the heat generated by the fireplace to the same floor and/or floors above the fireplace.
Internal Blower
The internal blower kit will increase the circulation of heated air in the room where the fireplace is installed.
Central Heat Blower Kit
The central heat blower kit enables the distribution of heat generated by the fireplace throughout many rooms and different floors using either dedicated ducts or the house central heating ducts.
Central Heating Tee
This Tee allows you to have two Gravity Vents (FO-V2) on your fireplace and still be able to install the Central Heat option (FO-FDHB6-1).
Heat Dump
The Heat Dump Kit contains all the parts necessary to circulate a moderate amount of heat from your fireplace to another room with a small fan.
Rock Retainer Kit (Opel Keystone)
This rock retainer kit will allow you to finish your Opel fireplace with thin non-supporting facing such as tiles
Masonry Chimney Adapter
This adapter will attach to the liner with 3 stainless steel rivets (provided) and to the EXCEL chimney with 3 screws (provided).

Technical specs

General Specifications

Outside Dimensions

36 7/8" W X 52 1/4" H X 24" D

Shipping weight

605 lb

Glass viewing size

22 ½" W x 14 7/8" H

Firebox size

3.6 cubic feet

Firewood length



7" Excel

Door finish


Outside Air


Mobile Home Approved



EPA Certification

0.7 g/hr

Optimal Efficiency

80% LHV

EPA Average Efficiency

70% HHV

BTU Output Range

10,000 to 70,000

Heating Capacity

1,500 to 3,000 ft2

Opel Plus Keystone


Catalogues and Brochures

RSF Catalog

Owner’s Manuals - Fireplaces

Opel Plus Keystone - Owner's manual

U.S. EPA Test Report

US EPA Test Report - Opel Plus

U.S. EPA Certificate

EPA Certification Letter - Opel Plus

Exploded View

Opel Keystone - exploded View CADdetails