The following product guides are available for the Vision Overhead Radiant U-tube Heater 25kW 5.1m long (Nat Gas) (VS25UTEN):
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)