Speak to an Expert

Support hours:

Mon-Fri: 8:30am - 5:30pm EST
Sat: 9:00am - 4:00pm EST

Easy Shipping & No Hassle Returns

FREE Shipping over $149*

Enjoy fast and easy shipping on thousand of items, delivered right to your home for free.

Learn more →

*Not all items qualify for simple shipping. Simple shipping only applies to locations within the continental United States. Some restrictions & charges may apply, such as non-standard items and shipping locations. This policy only applies to products shipped via standard shipping. Please visit our policy page for more information.

Complete Refractory Brick Set for RSF Onyx (FR-99.11.01.N)


Authentic RSF complete refractory set for the RSF Onyx wood burning fireplaces.

Refractory bricks are an integral part of your fireplaces and need to be replaced if they are damaged or degraded enough so that pieces are missing.  Refractory bricks protect the firebox of your fireplace from warping and damage.  They also keep hold the heat enabling a cleaner burn.

From this page you can purchase either individual bricks or the entire kit.

Note: The top interior baffle is NOT included with this brick kit.  It can be purchased separately here: Top Baffle for RSF Onyx

OEM Part Numbers:

  • Entire Brick Kit: 99.11.01.N (same as FR-99.11.01.N)
  • Front Right Brick: 11.4.N
  • Front Left Brick: 11.5.N
  • Left Side Brick: 11.2.N
  • Right Side Brick: 11.1.N
  • Back Brick Brick: 11.3.N (2 required)
  • Bottom Plug: 99.11.9.N

Applicable Models:

  • RSF Energy Onyx
  • RSF Onyx
  • RSF Onyx AP

This part may fit other RSF products as well.  Please consult your owner’s manual to confirm. 

Installation tips:  

Ash is not your friend when installing these bricks.  Make sure to vacuum out all of the ash from inside the firebox. DO NOT USE A HOUSEHOLD VACUUM.  Embers from the fireplace may cause a fire inside your vacuum.  Use an ash vac or a shopvac with a drywall filter.

It is best to note the position of the bricks you are removing (snap photos with your phone) so you can install the new ones in the same way.

Please Read:  Despite our best packaging efforts some firebricks may arrive cracked.  However, cracked firebricks are safe to use – it is only when pieces are missing that they need to be replaced.  

This complete brick set is in stock and ready to ship. 



Weight N/A
Dimensions N/A

Entire Brick Kit: 99.11.01.N, Front Left: FR-11.5.N, Front Right: FR-11.4.N, Left: FR-11.2.N, Right: FR-11.1.N, Back: FR-11.3.N (2 required), Bottom: FR-11.7.N, Plug: FR-11.9.N


There are no reviews yet.

Be the first to review “Complete Refractory Brick Set for RSF Onyx (FR-99.11.01.N)”

Your email address will not be published. Required fields are marked *

You may also like…