Commercial water heaters
Commercial tankless water heating systems
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Plan the system
| Requirement | What to establish |
|---|---|
| Demand | Peak simultaneous flow and required delivered temperature |
| Capacity | Each selected model's flow at the actual temperature rise |
| Multiple units | Compatible controls, staging and capacity when a unit is unavailable |
| Utilities | Combined gas demand, electrical supply, venting and condensate arrangements |
| Water quality | Treatment and maintenance meeting the manufacturer's requirements |
| Warranty | Commercial application and recirculation terms for the exact model |
Navien and Noritz model information
Our earlier commercial product information discussed Navien NPE-240A and NPE-240S units alongside the Noritz NCC1991. Those references identify different generations and models; do not apply today's A2 or S2 specification to an older unit without checking its nameplate.
A multiunit installation can allow service of one heater while others operate, but the remaining capacity still needs checking. Water treatment reduces scale; it does not remove annual maintenance and inspection requirements.
Individual equipment details
Existing equipment