Don't throw your money out the window.
Calculate the efficiency of your ventilation system using Calc-Leak. Ingenium, an independent research and energy audit agency, developed a unique web tool, at Lindab's request, which can be used to map out the financial effects of substandard airtight sealing of a ventilation system. Calc-Leak was used to calculate the energy losses as a result of these leaks for a standard hospital, a nursing home for the elderly and an office building.