All of our engineers are taking precautionary measures with face-masks, hand soaps, and all necessary equipment to prevent the spread and keep our customers safe. We will be operating normally. Fed up losing heat in your home? You're not alone. Around 25% of heat is lost through poor insulation. At Qualis we do things a bit differently. Unlike some other companies out there, we will work with you to understand your home heating needs, not just flog you a boiler then walk away. The cheapest energy around is the energy you don't use.