The most energy efficient humidifier I’ve found is the Venta Airwasher LW25. It requires less power, less water and fewer cleanings than most humidifiers. It is made in Germany and it has a 10 year warranty.
It’s important to keep indoor humidity at an optimum level (45 to 65 percent). Dry air in the winter is one the main causes of sinus infections and sore throats. Dry air is also hard on the lungs and tends to cause dry skin.
The Venta Airwasher is a unique device that cleans and humidifies the air in your room by drawing air over a slowly rotating drum which is covered with water. This low-tech “cold evaporation” system is very efficient — the Venta draws only seven watts on the highest setting.
I’ve been testing a Venta in my house for a couple of months now. It’s winter here, and the unit has been running 24 hours a day on the second highest setting. On average it consumes about 1.5 gallon of water per day.
The Venta requires fewer refills than most humidifiers and fewer cleanings too. Most humidifiers require cleaning every third day, but the Venta requires a cleaning only every two weeks. In order to cut down on the cleanings, it relies on a proprietary chemical mixture. It comes with a two week supplies on the cleaning mixtures. For $20, you can purchase a 35 ounce replacement bottle that last four months.
The Venta Airwasher has a ten year warranty and each model is fully recyclable. It is manufactured in a facility powered entirely by wind energy in Germany.
The Venta Airwasher is available from Amazon for about $300.