In the section where I live, the temperature fluctuates between twenty below zero plus ninety degrees. We deal with an annual snowfall of approximately seven feet, vicious wind chill, tons of rain, high winds plus excessive humidity. I depend on either the oil furnace or air conditioner for most of the year, plus devote half our budget to temperature control. Because of this, I’ve taken proactive strategies to reduce the workload of the heating plus cooling system. I do everything possible to eliminate energy waste. I’ve replaced all the windows in the home with Energy Star rated windows. I’ve improved the integrity of the insulation in the walls, ceilings plus attic. I’ve added ceiling fans, caulked around the windows plus installed weatherstripping on the exterior doors. I’ve replaced to a programmable thermostat to help regulate temperature plus trim energy use when our family is either out of the condo or sleeping. While these energy saving measures have significantly improved comfort plus trimmed running costs of the Heating plus A/C system, the same stale air is trapped in the house. There is no source of fresh air to ventilate contaminants such as dust, pollen, dander plus bacteria. The air began to smell musty, plus there were complications with humidity. I finally contacted a local Heating plus A/C corporation to get recommendations to improve indoor air quality. He advised a heat reusey ventilator, which brings in fresh outside air separate from adding to the workload of the oil furnace or air conditioner. It honestly uses the preheated stale air to warm up the incoming air in the winter. The ventilator also helps with humidity in the summer. The condo is cleaner, smells fresher plus feels more comfortable, plus yet I’ve split back on the cost of temperature control.