I was told by my oil company that if I placed fire bricks in my old oil furnace, it would run more efficiently?

I have the fire bricks but I'm not sure what the best way is to place them and whether or not I should cement them together. Has anyone ever heard of doing this or have any advice. I was told by my oil company that if I placed fire bricks in my old oil furnace, it would run more efficiently?
when replacing firebrick you must use a refactory fire cement. you can get this at any heating plumbing store. it is called furnace cement. stack and stagger the bricks in a herringbone fashion. bring the up 6 '; higher than the top of the burner endcone which sticks into the chamber. first lay the floor then build the box. the endcone shold sit 1/4 '; back of the inside of the side of the brick in the furnace. cement the brick just as if tou were doing a brick job. once you have reached the proper height put a capping of furnace cement all around the top of the bricks making it nice and smooth. fire the burner in 2 minute intervals until the cement is dry and there you have it a new firebox. I was told by my oil company that if I placed fire bricks in my old oil furnace, it would run more efficiently?
Fire bricks are used as a liner for insulating purposes. If the intent is to line the stove then you would be better off mixing up a refractory and coating the interior surface. Check with your local hardware store (not home depot or lowes... they don't have ';real'; people who know this stuff working there). Your mom and pop shop will know exactly what you need to do and the best way to get it done.
don,t cement them in


just stack them my wood stove is like that, they will expand and contract


yes it will make it heat better and hold heat After it shuts off

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