Ventilating correctly will save you money on heating and cooling costs. If you simply open a window, at least two things could go awry. First, you can’t control which way the air flows or how fast or slow it flows, or even what exactly comes into your home, such as pollen. Second, the money you’ve already spent to heat or cool the air in your home is going, well, out the window. Ventilation systems put you in control of how much fresh air is coming into your home, how much stale or damp air is leaving your home, and you can filter out things you don’t want coming into your home such as pollen. And, if you choose a heat or energy recovery ventilator, the temperature of the air leaving your home is recovered by the air coming into your home, so the cost to adjust the temperature of fresh outdoor air coming into your home is minimized. Check out Aldes VentZone Zoned IAQ with Heat and Energy Recovery Kits.