Humidity in your home is necessary. However, if the relative humidity inside gets up over 55 per cent, you can see condensation on your windows and that can signal the start of mold development. Excessive condensation on windows over a long enough period of time can even cause damage to the window frame and the wall below it. The solution is to take steps to control the relative humidity in your home. Here are a few suggestions to clear up the problem. Be proactive. If you maintain your furnace and air conditioner properly, the problem could be with the registers under the windows. Make sure there’s nothing impeding the air flow and circulation that is necessary to adjust humidity levels. Make sure your kitchen and bathroom fans are in good working order. These rooms contribute the most to the moisture in the air in any given home. Not only do you need good units that work well with a minimum of noise, it’s important be make sure they vent to the outside so the moisture doesn’t stay inside. A humidifier or dehumidifier can solve the issue as well. These come in different varieties including portable units that can be moved from room to room and ones that attach right to the furnace. Finally, better ventilation can lower any excessive moisture levels. That’s where getting the right Heat Recovery Ventilator (HRV) is the best course of action. These exhaust stale air to the outside and bring fresh air into the home and although they are expensive, they are generally very energy efficient. Oosterveld Heating and Air Conditioning is a family-owned and operated business servicing Guelph and the surrounding areas. You can see their fine selection of Lennox equipment at www.oosterveldheating.com or call them at 519-837-2351.