Thermostat setting needs to be adjusted often to maintain comfort: You or members of your family adjust the temperature setting on a daily basis.

House is too hot or too cold when you return home: You adjust the temperature to save money while you are away but return home to an uncomfortable house.

Some rooms are too warm, others too cool: Because of the way your home is constructed or the location/requirements of different rooms, the temperature and comfort levels of your home vary dramatically from room to room.

Troubled by allergies, concerned about indoor air pollution: Dust, pollen, mold and pet dander aggravate your family's allergies. Billions of particles, too small to be seen, are in the air you breathe every day, from bacteria and viruses to cooking and smoke particles.

Stuffy air: Exhaust fans in bathrooms and kitchens just aren't enough to keep air fresh at home. The accumulation of formaldehyde form building materials and gaseous pollutants from household products is another source of concern.

Moisture is damaging windows and woodwork: As homes are sealed up with insulation and caulking to save energy, excess humidity from cooking, laundry, bathing, and even the building materials themselves, builds up and becomes trapped inside.

Excessively dry air causes dry skin, cracked nasal passages and static electricity shocks. Overly dry air can also aggravate respiratory ailments, causes woodwork to shrink and crack and loosen furniture joints.

Constant dehumidifier use generates high electric bills. Running your dehumidifier or air conditioner to remove excess moisture can send your electricity bills skyrocketing.

Walls are cluttered with several controls. Your walls include separate panels for temperature, humidification, ventilation, air cleaner and/or fan which is both unattractive and inconvenient.