Premier VS Infrared Heating System
Page 21
June 04, 2014
INSTALLATION
Table C: Tailpipe Lengths Required for Various Branch Layouts
No.
1
No.
2
No.
3
150
‐
‐
150
20
(6.1)
150
120
‐
270
30
(9.2)
150
120
120
390
30
(9.2)
175
‐
‐
175
20
(6.1)
175
130
‐
305
30
(9.2)
175
130
130
435
30
(9.2)
200
‐
‐
200
20
(6.1)
200
165
‐
365
30
(9.2)
225
‐
‐
225
20
(6.1)
250
‐
‐
250
20
(6.1)
Exceptions:
3)
When
using
5"
Ø
Tailpipe,
the
Required
Tailpipe
Lengths
may
be
reduced
by
25%
1
1
1
1
Number
of
Burners
in
Radiant
Branch
Total
Output
for
Branch
[MBTU/hr]
Minimum
Tailpipe
for
Branch
[ft
(m)]
minimum
tailpipe
length
must
be
increased
by
50%
3
2
3
2
Burner
Input
Rate
at
each
Position
[MBTU/hr]
OR
3
‐
If
result
is
≤
40'
remaining,
multiply
by
0.75
for
Minimum
Common
Tailpipe
Length
1)
When
minimum
Radiant
Tube
lengths
are
used,
2)
If
using
Common
Tailpipe
refer
to
the
following
to
determine
1
‐
Add
up
usual
recommended
lengths
of
Tailpipe
(from
data
in
this
Table)
3
‐
If
result
is
>
40'
remaining,
multiply
by
0.6
for
Minimum
Common
Tailpipe
Length
2
1
the
Minimum
Common
Tailpipe
length
required:
2
‐
Subtract
the
length
of
any
Tailpipe
which
will
NOT
be
Common
