The following installation manuals are available for the BTHE range:
BTHE Radiant 'U' Tube Heater - Installation Manual - https://www.reznor.co.uk/wp-content/uploads/2025/08/D301771-Reznor-BTHE-Installation-Manual-EN-2025-08-Iss-1.pdf
D301770 Reznor, BTHE, Installation Manual, DE 2025-08, Iss 1 - https://www.reznor.co.uk/wp-content/uploads/2025/10/D301770-Reznor-BTHE-Installation-Manual-DE-2025-08-Iss-1.pdf
D301778 Reznor, BTHE, Installation Manual, FR 2025-08, Iss 1 - https://www.reznor.co.uk/wp-content/uploads/2025/10/D301778-Reznor-BTHE-Installation-Manual-FR-2025-08-Iss-1.pdf
D301779 Reznor, BTHE, Installation Manual, NL 2025-08, Iss 1 - https://www.reznor.co.uk/wp-content/uploads/2025/10/D301779-Reznor-BTHE-Installation-Manual-NL-2025-08-Iss-1.pdf
D301823 Reznor, BTHE, Installation Manual, ES 2025-10, Iss 1 - https://www.reznor.co.uk/wp-content/uploads/2025/10/D301823-Reznor-BTHE-Installation-Manual-ES-2025-10-Iss-1.pdf