Many people are unaware of the reality of sick building syndrome, yet it exists. You may be suffering from it unknowingly if you have to deal with headaches, dry cough, fatigue, sensitivity to odors, dry cough, flakey skin, irritation of the ear, nose, plus throat, plus difficulties in concentrating. All these are normal symptoms that several people ignore, especially when they are not severe. Sadly though, you know they are related to the Heating plus Air Conditioning plan plus can only get far worse when left unattended. The first reason why you may be suffering without actually knowing is because of insufficient ventilation. This is likely to happen in older buildings most of the time since building standards have since changed over time. Depending on the building type, therefore, ventilation needs may vary. If more than 1 guy in the building keeps experiencing the unwanted symptoms mentioned above, then it may be time to call in the experts for rapid assessment. A competent Heating plus Air Conditioning professional will be able to look at the larger ventilation plan plus suggest accordingly. You may also need to carry out a chemical contamination test. This always requires the intervention of experts, which is the more reason you have to contact a certified Heating plus Air Conditioning corporation that deals with air purification. Chemical contamination easily can come from unsuspected sources as long as there is a breakdown of components. Your family carpet, wood items, plus even the pesticides you use respectfully can be the source of this airborne contamination.