We would like to install a Jotul Fireplace Stove #3 built in 1986) in front of our fireplace. We have a couple of questions. What is best way to shield the wooden trim on either side of the fireplace opening. It is 3/4 inch thick pine on top of the brick edge and will be about 13 inches from the edge of the stove. The stove clearances specify 16" from the side trim. We were thinking of just a piece of sheet metal with 1" ceramic standoffs. Should the metal be bent to follow the trim shape and be spaced 1" out but touching the brick or should it be flat, with the edge touching the brick but 1" in from the trim edge? Should it be 1" off the hearth?
Next question the fireplace hearth is not big enough for the stove clearances. The stove specifies the floor protection to be "2 layers of 3/8 inch millboard having a thermal conductivity K of less than or equal to 0.84 btu in/ft/sq. h. degrees F or the equivalent protection shall extend at least 16 inches in front and at least 8 inches to each side of the fuel loading door and beyond the back of the stove." I found 2 different K to R conversions on this web site. One is R=(1/(Kx12))xThickness which would yield a total R=(1/(.84x12))x3/8=.074 The other is R=(1/K)xThickness which would yield R=(1/.84)(3/8)2=.893 . So which formula is correct? Does a 36"x36"x2" thick reinforced concrete block have enough R value to meet the requirements?
Thanks for your help
Next question the fireplace hearth is not big enough for the stove clearances. The stove specifies the floor protection to be "2 layers of 3/8 inch millboard having a thermal conductivity K of less than or equal to 0.84 btu in/ft/sq. h. degrees F or the equivalent protection shall extend at least 16 inches in front and at least 8 inches to each side of the fuel loading door and beyond the back of the stove." I found 2 different K to R conversions on this web site. One is R=(1/(Kx12))xThickness which would yield a total R=(1/(.84x12))x3/8=.074 The other is R=(1/K)xThickness which would yield R=(1/.84)(3/8)2=.893 . So which formula is correct? Does a 36"x36"x2" thick reinforced concrete block have enough R value to meet the requirements?
Thanks for your help
