Cheaper, faster and easier to install. CA-1000 • Eliminates the need for a sail switch or pressure switch with a built-in solid state airflow sensing device. • Uses 40VA transformer already on the furnace and/or air conditioner. Power supply boosts the 24-volt input to proper high voltage to the collector cells. Cleans Air Better • Maintains constant output voltage to the cells for maximum efficiency. No other air cleaner does this. With other cleaners the voltage to the cells drops as they coll