Ventilation & Moisture
Your air conditioning and heating system is a very important element of the air you breathe. Unfortunately, most HVAC companies concentrate solely on the fixing and maintenance of the mechanical aspects of the HVAC system. Replacing the filter with a high quality filter is the first step to good quality air. However make sure you do not over do the quality rating of the filter. It can cause a blockage of the air throughout your system. Filters are rated in MERV. The higher the MERV rating the more the filter will trap particulates. Normally a MERV of 6-8 will be good for your system. If you are not sure ask your HVAC dealer.
Are there any health benefits that come from HVAC system cleaning?
Heating, ventilation, and air conditioning (HVAC) systems have been shown to act as a collection source for a variety of contaminants that have the potential to affect health, such as mold, fungi, bacteria, and very small particles of dust. The removal of such contaminants from the HVAC system and home should be considered as one component in an overall plan to improve indoor air quality.
How often should residential HVAC systems be cleaned?
Frequency of cleaning depends on several factors, not the least of which is the preference of the home owner. Some of the things that may lead a home owner to consider more frequent cleaning include:
• Smokers in the household.
• Pets that shed high amounts of hair and dander.
• Water contamination or damage to the home or HVAC system.
• Residents with allergies or asthma who might benefit from a reduction in the amount of indoor air pollutants in the home’s HVAC system.
• After home renovations or remodeling.
• Prior to occupancy of a new home.
Below is a picture inside the return plenum
What criteria should you use when selecting an HVAC system cleaner?
You should interview as many local contractors as possible. Ask them to come to your home and perform a system inspection and give you a quotation. To narrow down your pool of potential contractors, use the following pre-qualifications:
• Make sure the company is a member in good standing of the National Air Duct Cleaners Association (NADCA).
• See if the company has been in business long enough to have adequate experience.
• Get proof that the company is properly licensed and adequately insured.
• Verify that the company is certified by NADCA to perform HVAC system cleaning.
• Make sure that the company is going to clean and visually inspect all of the air ducts and related system components.
• Avoid advertisements for "$99 whole house specials" and other sales gimmicks.
• Ask if the company has the right equipment to effectively perform cleaning, and if the company has done work in homes similar to yours. Get references from neighbors if possible.