The following installation manuals are available for the RHeco Natural Gas 100kW Modulating Unit Heater (ULSA100-EC-2):
ULSA EC - Installation Manual - June 2018(https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-ULSA-Installation-Manual-EC-EN-2018-06-D301098.pdf),
ULSA-2 Vertical Louvre - Installation Manual - October 2024(https://www.reznor.co.uk/wp-content/uploads/2024/10/OP207.1-ULSA-2-Vertical-Louvre-Installation-Manual-D301646-Oct-2024-rev-0.pdf),
ULSA-2 - Installation Manual - September 2025(https://www.reznor.co.uk/wp-content/uploads/2026/02/D301479-Iss-3-Reznor-ULSA-2-Installation-Manual-EN-2025-09.pdf)