The following installation manuals are available for the DF/MUA range:
Nordair Niche - Installation Manual - https://www.reznor.co.uk/wp-content/uploads/2025/06/Reznor-Nordair-Niche-Installation-Manual-EN-2025-03-D301670-Issue-1.pdf
NordairNiche DF - Installation Manual - https://www.reznor.co.uk/wp-content/uploads/2023/12/2.-703000-DF-Instruction-Manual-NN-EN-0415-A3F-GBNOR0770415.pdf