Are the rooms of the house or office not cooling or heating properly? Is there a funny smell in the air? If yes, get the ductwork checked by a professional HVAC and air duct cleaning company. The ductwork is the lung of the heating and cooling system; keep it clean. If you reside in Texas, you will likely be forced to stay indoors to beat the extreme heat or freezing cold, depending on the HVAC, air conditioning, or heating system. Improving indoor air quality is not a luxury but a must for your health.