It can cost anywhere from $500 to $1,500 to install a central air purifier, depending on the size of your home and the type of system you choose. Some air purifier systems require a professional installer, while others can be installed by the homeowner. If you're not comfortable installing the system yourself, it's best to hire a professional.

It depends on the size of your home, the type of purifier you choose, and the contractor you hire. Generally speaking, the cost to install a central air purifier ranges from $1,500 to $5,000. Some factors that will affect the final price include the type of filter system (HEPA filters are more expensive than carbon filters), whether or not an electronic air cleaner is included, and whether or not any ductwork needs to be replaced. Be sure to get quotes from several contractors before making a decision.