Whole-house air purification system costs vary and are dependent on your HVAC systems capabilities.
If your system is capable of handling a higher MERV-rated filter the cost is simply the upgraded filter.
If your system is capable of handling a higher MERV-rated filter but would need some ductwork modifications, the cost for the filter, assembly housing, and any ductwork modifications can cost anywhere from $500 to $1,000.
If you are looking to upgrade the air filtration abilities of your HVAC system, a professionally installed electronic air filter (like the Carrier Infinity Air Purifier) can cost anywhere from $1,000 to $4,000 depending on each system and installation requirements.
The main factors that will influence the cost of HVAC air filters are the type of filter, the size of the unit, and the features that are included. For instance, a HEPA filter, which can trap up to 99.97% of particles, will cost more than a flat filter.
Installation costs will also vary depending on the type of system that you choose. Likewise, portable air filter costs depend on the unit's capabilities, with costs ranging from $50 to over $500 per unit.