The answer to 'how much to replace air filter in my area' depends on several factors, but typical costs can range from $10 to $50 for a basic air filter replacement. The specific price will depend on the size and type of filter needed for your HVAC system, as well as the labor cost charged by local HVAC contractors.
Some key factors that influence the cost include the brand and quality of the filter, whether it's a standard size or custom fit, and the accessibility of the filter in your system. More expensive high-efficiency filters or those that require more labor to replace will be on the higher end of that range. It's best to get quotes from 2-3 local HVAC companies to compare prices in your area.