Today's homes are built so tight and with such energy efficiency in mind that requirements for ventilation have had to be implemented. An HRV will provide the necessary ventilation required in today's leak-free homes. At the same time they can provide additional particle removal from the air providing allergy free breathing. People with respiratory troubles will find this system a necessity as it will remove the allergens and particles that cause trouble.
With this system warm stale air gives its heat to the cool fresh air coming in. Modules can also be added to provide air conditioning to your home.