The following installation manuals are available for the OUH range:
Ambirad OUH2 - Installation Manual - March 2011 - https://www.reznor.co.uk/wp-content/uploads/2023/12/AmbiRad-OUH2-Installation-Manual-EN-2011-03-33-65-230-Iss-5.pdf
Benson OUH2 - Installation Manual - March 2015 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Installation-Manual-EN-2015-03-33-65-190-Iss-10.pdf
OUH - Installation Manual - January 2019 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-OUH-Installation-Manual-EN-2019-01-D301030-Issue-F.pdf
OUH2 - Installation Manual - March 2015 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-OUH2-Installation-Manual-EN-2015-03-33-65-231-Iss-10.pdf