Do you call the contractors only when your HVAC unit breaks down? When was the last time you had maintenance done on your system? Do you know how dirty air ducts and filters can get without cleaning?
If you answered: yes, I don't recall, and no to these questions, you're due for maintenance.
Without proper maintenance, dust and debris start to accumulate in the air ducts and filtration system. With a blocked filter, it does not effectively capture allergens or pathogens that are in the circulating air. Also, bacteria can grow in the duct work and cause health problems, when inhaled.
Avoid this from happening and feeling ill, call your local ventilation contractor!
California Air Conditioning Systems, Inc. office/ 310.530.0504 after-hours/ 310.505.5700 fax/ 310.530.4004