| 165 / | HD | HEAT EXCHANGE |
| DIG 342 | | TANK WITH HEAT EXCHANGER {5} |
| DIG 343 | DD | .~> Heat exchanger forms all or portion of tank {2} |
| DIG 347 | DD | .~> Heat exchanger forms cover for tank |
| DIG 348 | DD | .~> Heat exchanger within tank {4} |
| DIG 353 | DD | .~> Tube coil bonded directly to tank exterior |
| DIG 354 | DD | .~> Heat exchanger serially connected to tank |