Fan-in-a-Drum® |
Combustion Air Systems
CAS-6 and CAS-7
The Fan-in-a-Drum® is a commercial product designed to deliver combustion air into the mechanical room, boiler room or furnace location to overcome a confined space or inadequate air supply. CAS 6 & 7 are dual volt units for oil or gas applications.
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StarKap® |
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How the CAS-6 and CAS-7 Work
When the thermostat calls for heat, the Fan-in-a-Drum® engages and begins drawing air into the structure. When air flow is established, the pressure switch closes. The CAS sends a signal to the appliance, allowing the burner to fire. The Fan-in-a-Drum® diffuses the outside air into the room near the burner to ensure adequate air for efficient combustion.
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Max. Equivalent Length of Pipe, Including StarKap® |
CAS-6 OIL(gph) |
CAS-6 GAS(BTU/hr) |
8" duct |
10" duct |
12" duct |
3 |
420,000 |
410 |
1253 |
3119 |
3.25 |
455,000 |
344 |
1051 |
2616 |
3.5 |
490,000 |
291 |
890 |
2217 |
3.75 |
525,000 |
249 |
760 |
1893 |
4 |
560,000 |
214 |
653 |
1627 |
4.25 |
595,000 |
185 |
584 |
1405 |
4.5 |
630,000 |
160 |
489 |
1217 |
4.75 |
665,000 |
139 |
424 |
1057 |
5 |
700,000 |
121 |
369 |
919 |
5.25 |
735,000 |
105 |
321 |
800 |
5.75 |
805,000 |
79 |
241 |
601 |
6 |
840,000 |
58 |
176 |
519 |
6.50 |
910,000 |
49 |
151 |
377 |
CAS-7 OIL(gph) |
CAS-7 GAS(BTU/hr) |
10" duct |
12" duct |
14" duct |
6 |
840,000 |
469 |
1167 |
2523 |
6.5 |
910,000 |
381 |
948 |
2050 |
7 |
980,000 |
311 |
776 |
1678 |
7.5 |
1,050,000 |
256 |
637 |
1378 |
8.25 |
1,155,000 |
191 |
476 |
1029 |
9 |
1,260,000 |
142 |
354 |
766 |
9.75 |
1,365,000 |
104 |
260 |
563 |
10.5 |
1,470,000 |
74 |
186 |
403 |
11.25 |
1,575,000 |
51 |
127 |
274 |
12 |
1,680,000 |
31 |
78 |
207 |
12.75 |
1,785,000 |
15 |
39 |
114 |
12.88 |
1,803,000 |
13 |
33 |
72 |
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