The following product guides are available for the Vision Overhead Radiant U-tube Heater 25kw 5.1m long Propane (VS25UTEP):
Reznor Nortek Vision Sales Brochure (Jan 20)(https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Nortek-Vision-Sales-Brochure-Jan-20.pdf)