Now you can be sure your home's air is clear of dust, pollen, fungi, smoke and other particles too small to see. It's easy with York's HEPA, Electronic and Media Air Cleaners. These cleaners provide stepped-up filtration, more effective than your furnace or air conditioner alone. In fact, these cleaners can remove up to 94 percent of the particles that pass through your home's system. And since these pollutants can build up as film on walls and furniture, this is performance you'll feel and see.

You can protect your home and your family from allergy-causing mold with York's selection of air purifiers. These ultraviolet air treatment systems kill mold that would grow in the cool, damp interiors of your air conditioning system. This is the same technology that's long been used by water treatment facilities, adapted by York for safe, efficient home air purifiers.

Southern California is a relatively dry climate compared to the rest of the nation. Associated with dry climates are dry skin and eyes, nosebleed, static electricity (clothes clinging to you, hair clinging to your comb or brush and electric shock when you touch a metal object). These symptoms are most noticeable during the famed Santa Ana winds.

All of these can be cured by raising the humidity in you home which can be accomplished with a humidifier connected to your air-conditioning system and controlled by a compatible thermostat.

Newer homes are increasingly sealed tighter than older homes to help keep the conditioned air inside, and the unconditioned air outside, to maximize the energy efficiency of your comfort system. The problem with this design is that you sacrifice the benefits of fresh air that would have "leaked" into the house.

Commercial buildings have had to deal with this for years since most windows in a commercial building do not open. Fortunately for the occupants of commercial buildings, the state mandates a minimum of 15 cfm (cubic feet per minute) of fresh air per person be designed into the comfort system. Unfortunately, this mandate does not apply to residential homes.

Energy Recovery Ventilators can exchange fresh, clean air from the outside and remove stale inside air, along with dust and other particle buildup.