The following product guides are available for the VCH range:
Ambirad VCH-HCH - Product Guide - November 2004 - https://www.reznor.co.uk/wp-content/uploads/2023/12/AmbiRad-VCH-HCH-Sales-Brochure-EN-2004-11-GB-WA-024-1104.pdf
Ambirad VCH-HCH - Product Guide - October 1997 - https://www.reznor.co.uk/wp-content/uploads/2023/12/AmbiRad-VCH-HCH-Sales-Brochure-EN-1997-10-WA-024-1097.pdf