Thermix Chimney Liner Insulation



Lindemann Chimney Supply sells wholesale only  to the chimney and hearth industry.


Thermix Insulation
TherMix is a UL listed insulation component that has been UL listed with VENTINOX flexible stainless steel chimney liner, as well as with select other brands of chimney lining systems.  Its patented formula was designed to maintain a consistent liner temperature for better chimney performance.

TherMix is lightweight (about 14 lbs. per square foot) and when combined with the lining system it adds superior structural strength to the chimney.

Available in
3.25 Cubic Feet Coverage Bag or
3.25 Cubic Feet Coverage Box (convenient for UPS shipping)

Mix with Water
TherMix is delivered in a strong poly-lined bag or poly-lined bag in a box, containing all ingredients except water, which must be added to moisten the material for proper installation.
Proper consistency is achieved when the material feels damp but is still granular (ca. 7 to 9 gallons of water/bag). Test: when a handful of properly moistened TherMix is squeezed hard, little or no water appears between the fingers.

During installation, correctly prepared TherMix pours like "loose fill". TherMix is distributed within the chimney cavity by vibrating the liner and does not have to (and should not) be tamped down. NOTE: Lining material manufacturers have their product specific instructions for this task. See CHIM-FLEX installation instructions for specific information.

HOW MUCH THERMIX

Use Table 1 to estimate the number of TherMix bags needed to do the job.

1. Find the flue opening that comes closest to the one to be lined, down the left hand column.

2. Find the size of the liner to be installed across the top line.

3. Where both columns intersect, read the cubic foot volume of TherMix per foot of chimney height.

4. Multiply this volume by the height (in feet) of the chimney.

5. Divide the cubic feet obtained in step #4 by 3.25 to determine the number of bags of TherMix needed.
(Each bag yields approx. 3.25 cu. ft.).

EXAMPLE:
A 28 ft. tall chimney with a flue opening 8.5" x 8.5" is to be lined with a 6" liner. As you see from Table 1, .30 cu.ft. of TherMix is needed per foot of chimney height. Multiply .30 by 28 ft. (the height of the chimney) to get 8.4 cu. ft. Now divide 8.4 by 3.25 (the approximate volume yield per bag of TherMix) to obtain 2.6, which is the number of TherMix bags eeded for this relining job.
TABLE 1
TherMix Volume per one foot of chimney height
Flue
Opening
Diameter of liner
5"
6"
7"
8"
10"
12"
7.5" x 7.5"
.25
.20
n/a
n/a
n/a
n/a
7.5" x 11.5"
.46
.40
OV.38
OV.32
n/a
n/a
8.5" x 8.5"
.36
.30
.23
n/a
n/a
n/a
8.5" x 11.5"
.54
.48
.41
OV.36
OV.33
n/a
9.5" x 9.5"
.49
.43
.36
.27
n/a
n/a
11.5" x 11.5"
.78
.72
.65
.60
.37
n/a
11.5" x 16.5"
1.16
1.12
1.05
.96
.77
n/a
12.5" x 12.5"
.95
.88
.82
.73
.53
n/a
14.5" x 14.5"
1.30
1.26
1.20
1.10
.92
.65
14.5" x 18.5"
1.70
1.66
1.60
1.50
1.30
1.04
NOTE: masonry chimneys are not uniform structures. have extra bags available in case you need them. If you have a situation that is not covered by the table above, refer to the fomula below:

Determine the number of TherMix bags:
Bags of  
Thermix
    (W" x D" x H") - (CS x H")
= ___________________
:3.25
1728 cu. in.

W   = Width of flue opening (in inches)
D    =  Depth of flue opening (in inches)
H    =  Height of flue opening (in inches)
CS =  Cross Section areas of chimney liners
                    (see table 2 below)

TABLE 2
Cross Section Area of Liners
Liner Size
CS Areas
Round
5"
   19.62 sq. in.
Round
6"
  28.46 sq. in.
Round
7"
  38.46 sq. in.
Round
8"
  50.25 sq. in.
Round
9"
  62.50 sq. in.
Round
10"
  78.50 sq. in.
Round
12"
113.22 sq. in.
Oval
6"
24.60 sq. in.
Oval
7"
32.20 sq. in.
Oval
8"
37.20 sq. in.
Oval
10"
49.50 sq. in.

Thermix Insulation
Package
Item #
42 lb. bag
390142
42 lb.
boxed for UPS
390143





Copyright Lindemann Chimney Supply 2005