Living in the dry climate of colorado, I've been wanting to install a whole house humidifier. My brother has one and loves the way it makes the house feel but with his the water is constantly trickling through the humidifier even when the furnace is not running wasting tons of water. I bought a used humidifier off craigslist and have been trying to think of ways it solve this problem. Can I get some sort of electronic valve that will turn the water on only when the furnace is running?