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 635cfm Central Heating Blower)
  • 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

Technical specs

General Specifications

Outside Dimensions

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

Shipping weight

Firewood length


Firebox size

3.6 cubic feet


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