WHOLE HOUSE ELECTROSTATIC  AIR CLEANER, PRE FILTER 17-1/2" X 21" X 1", VOLT:24, AMPS:0.8, AIRFLOW RANGE:300-1600, REMOVES UP YO 99.98% OF ALLERGENS FROM THE FILTERED AIR, REMOVES PARTICLES DOWN TO .01 MICRON IN SIZE, CONSTRUCTED OF HEAVY 18 GAUGE METAL TO PROTECT THE FILTER AND INTERNAL ELECTRONICS, DIMESNIONS: 17-1/2"H X 7-3/8"W X 23-1/2"L, WEIGHT:34 LBS 2 OZ MADE IN MEXICO***PRE-FILTER ASSEMBLY NOT INCLUDED***