
The Lochinvar ATI-540HX3N Tankless Water Heater is an on-demand water heating unit designed to provide hot water based on active system demand. Identified by part number ATI-540HX3N, this unit operates across a firing range of 15,000 to 199,000 BTUs (15 to 199 MBH). It heats water directly as it passes through the heat exchanger, eliminating the need to maintain a dedicated storage vessel.
Tankless water heaters activate burner operation upon sensing flow, modulating thermal output to meet the desired setpoint temperature. By heating water continuously as required and remaining off during periods of zero flow, this equipment type reduces standby energy loss.
Key Performance Features:
- Modulating Firing Range: Adjusts thermal input from 15,000 to 199,000 BTUs to track varying flow rates and load requirements.
- Continuous Flow Heating: Heats water instantly as it moves through the internal passages rather than storing static hot water.
- Unit Weight: Features a total shipping weight of 72.5 lbs for staging and handling.
- Model Specification: Identified under model number ATI-540HX3N for direct system matching.
Application: Designed for Lochinvar ATI-540HX3N tankless water heating equipment. Confirm the part number against your existing part or unit, or send your model and serial number to National Boiler Supply to verify before ordering.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | ATI-540HX3N |
| Shipping Weight | 72.5 lbs |
| Firing Range | 15,000 - 199,000 BTUs |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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