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The best way to save money on HVAC repairs is by regularly having your system inspected and maintained. This can prevent bigger problems and costly repairs and replacements in the future. It’s also smart to buy quality equipment and hire companies that provide warranties on equipment and labor. If you need repairs, you may be able to save money by cashing in on rebates and incentives or keeping the area around your HVAC unit clear to shorten the time your contractor needs to spend in your home.

Air filters with a high MERV rating, 11 or above, shouldn't cause airflow problems in most residential systems. However, the airflow can be restricted in some HVAC systems if they aren't designed for high MERV ratings. If in doubt, a local duct installer should inspect your ductwork so that you know what your system can handle.

The lifespan of a whole-house air purifier or filtration system depends on several factors, but with proper maintenance, they are built to last. A whole-house system that integrates with your home's ductwork can last 10 to 15 years, or even for the entire lifetime of your existing HVAC system. To maximize the unit's lifespan, perform regular cleanings, change filters as recommended, and schedule an annual inspection to catch potential issues early. The system's longevity also depends on its frequency of use and how hard it must work to maintain your desired air quality. For comparison, smaller, portable air filter systems typically last between five and ten years.

Air filters with a MERV rating of 11 or higher need to be changed every three to six months. If your filters are incredibly strained because of environmental factors, such as living in a smoggy, pollen-rich area with a large household, you may need to change your filters every two months regardless of the MERV rating.