The following product guides are available for the Apollo Quartz Glow Electric 4.5kW Radiant Heater - Triple Linear Tube - Black (QHL45-1-B):
Quartz Glow - Product Guide(https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Nortek-Quartz-Glow-Sales-Brochure-Jan-20.pdf)