| . |
Construction |
Operator |
Assembly |
Weight |
Cost |
Safety |
Reliability |
Number
of parts |
Local
parts availability |
Up
keep |
|
Maintains temperature at 20
|
. |
2
|
. |
. |
3
|
. |
9
|
. |
. |
. |
|
Coated metal .surfaces
|
. |
9
|
1
|
. |
9
|
. |
9
|
1
|
9
|
. |
|
Marine quality alloys
|
. |
9
|
1
|
. |
9
|
. |
9
|
1
|
9
|
. |
|
4 years before service
|
3
|
9
|
. |
9
|
. |
. |
. |
. |
. |
. |
|
Assembly by 2 persons
|
. |
. |
9
|
9
|
9
|
3
|
9
|
9
|
3
|
. |
|
Wiring meets code
|
9
|
3
|
1
|
. |
9
|
9
|
9
|
1
|
1
|
. |
|
Mates with 4" PVC
|
9
|
. |
3
|
. |
1
|
1
|
. |
3
|
9
|
. |
|
Fail safe 1/1000 sec
|
. |
9
|
. |
. |
9
|
9
|
9
|
. |
. |
. |
|
Minimum flow 8.13 kg/sec
|
9
|
. |
. |
. |
9
|
. |
1
|
3
|
. |
. |
|
One person control
|
. |
9
|
. |
. |
9
|
3
|
3
|
. |
. |
. |
|
Maximum cost $3000
|
9
|
. |
3
|
1
|
9
|
. |
. |
1
|
9
|
. |
|
Continuous 48 hrs operation
|
. |
9
|
. |
. |
9
|
1
|
9
|
. |
. |
. |
|
Temperature range 500 F
|
. |
. |
. |
. |
9
|
3
|
. |
. |
. |
. |
|
Designed in .Pro-E
|
9
|
. |
9
|
1
|
9
|
. |
. |
9
|
3
|
. |
|
Design complete by 12-4
|
. |
9
|
. |
1
|
9
|
. |
. |
. |
. |
. |
|
Piping water tight
|
. |
1
|
1
|
. |
1
|
1
|
1
|
. |
. |
. |
|
Display temperature reading
|
. |
9
|
. |
. |
9
|
3
|
9
|
. |
. |
. |
|
Power on indicator
|
. |
9
|
. |
. |
9
|
9
|
9
|
. |
. |
. |
|