For Lake in the Hills residents seeking quality heating and air-conditioning services, there is Approved Comfort. Approved Comfort is a licensed and insured heating, ventilation and air-conditioning (HVAC) company that offers a variety of services, including installations and repairs for humidifiers, garage heaters, furnaces and other heating and cooling apparati. Approved Comfort offers free estimates, as well as warranties on all of its products. For more information, please call or visit the website.