Air cleaner

A method of cleaning air comprising:

• providing an air cleaner comprising:
• a rear filter receiving air from an outer environment;
• an ionizer grid operatively coupled to a high voltage power supply, the ionizer grid having a frame and a plurality of wires extending between opposite sides of the frame, the ionizer grid receiving air from the rear air filter and emitting positively charged ions that apply an electrostatic charge to the air;
• a collector grid operatively coupled to ground, the collector grid having a plurality of wires extending between opposite sides of a frame, the electrostatic charge causing the air to move toward the collector grid;
• a front filter receiving the air from the collector grid and collecting contaminants suspended in the air;
• and
• an apparatus frame housing the rear filter, the ionizer grid, the collector grid, and the front filter,
• wherein the frames of the ionizer grid and of the collector grid are suspended within the apparatus frame with isolating members made of a non-arc tracking material, such to minimize coronal discharge and audible noise;
• and
• operating the air cleaner to cause the air to flow through the air cleaner.