This Installation in a loft, consisted of a Vaillant IQ boiler and a Vaillant unvented cylinder. The IQ is one of the most efficient boilers on the market. That, combined with the unvented cylinder and Vaillant controls, meant the system could be easily controlled via an app, and would keep running costs to an absolute minimum. The heating was split into 3 zones – Radiators, Bathroom towel rails, and an Underfloor Heating circuit. That means in the summer, just the towel rails in the bathrooms could be heated. We installed isolation so that each part of the house could be individually isolated.