We would recommend the PHOTON 120 as a replacement for your Benson VRA 120-4. Please click the link below to view the product. https://www.reznor.co.uk/product/euro-t-heating-ventilation-and-cooling-unit/
What would be a good replacement for a Benson VRA 120-4?
Looking to upgrade your old heater? Look here for information on which product is the best like-for-like replacement.