| 99% Energy Efficient |
 |
Average 60-75%
efficiency |
| Safe, atmospheric pressure |
|
Pressurized, ASME-code
vessel, higher insurance cost |
| No certified operator required |
|
Certified operator may
be required |
| Not subject to ASME code,no
inspections |
|
Subject to ASME code
requirements, including permits and annual inspections |
| Heats water as needed, heater shuts
off when not needed. |
|
Boiler feed system
always "on" increasing energy costs. |
| Less frequent maintenance, more
production time. |
|
More frequent
maintenance, less production time. |
| 304/304L stainless steel vessel |
|
Cast iron and carbon
steel |
| Small footprint |
|
Requires extra room |
