There isn't a definite answer to the question. It depends on the situation. If there is moisture (which can promote mold growth) in your ducts, you should do it once or twice a year, but the general recommendation is that your vents and ducts should be cleaned every two years.
A HOME OWNER SHOULD CLEAN THEIR VENTS A MINIMUM OF THREE TIMES A YEAR. IT IS IMPORTANT FOR AIR QUALITY AND PERSONAL HEALTH.
In a car, just spray a product called BG Frigi Fresh in the vents once a year. In a home, that depends on the home and where you live but regular duct cleaning is probably unnecessary for most householders.......... Talking about my home air vents and wondering how to clean them, can I rent a machine to do it, how much should that rental cost, and how long should it take with 5 air ducts?
You can clean the air conditioning by vacuuming out the air conditioning vents. You can also clean the air conditioning condenser vent screen.
how to clean downdraft air vents Impossible to bring up the answers on your site. Extremely frustrating.
One can clean the air ducts by getting a bucket with warm water and wiping down the ducts individually. However, please note it may not produce the same results as having them cleaned professionally.
The most common cause of an air conditioner not blowing air is a plugged filter. Be sure your filter is clean.
Return air vents.........
To properly vent a garage for air circulation and ventilation, install vents near the ceiling to allow hot air to escape, and vents near the floor to bring in fresh air. Consider using a combination of passive vents and mechanical fans for optimal airflow. Regularly clean and maintain vents to ensure they are functioning properly.
Use a toothbrush to clean out the xbox vents, then use an air hose to clean out the inside.
House air vents should be cleaned at least every 1-2 years to maintain good indoor air quality.
D:) Yearly.
To clean vents in your home properly hire a reputable company and be sure that at least one person on the job has the proper certification. For more information visit http://www.ehow.com/way_5992729_forced-air-vent-cleaning.html.