Integrated system for heating, cooling and heat recovery ventilation

An integrated forced air heating, cooling, and heat recovery ventilation apparatus for a space, said apparatus comprising, in combination within one system:

• a stale air return inlet connectable to stale air return ducting, a stale air exhaust outlet connectable to stale air exhaust ducting, a fresh air inlet connectable to fresh air inlet ducting, a fresh air outlet connectable to an indoor supply air duct, and an air-to-air heat exchanger connected to said stale and fresh air elements to exchange heat between stale air and fresh air;
• a mixing chamber, for proportionately mixing indoor return air and fresh air to be returned to said space as occupied space return air;
• an indoor blower, for drawing indoor return air into said mixing chamber and at the same drawing fresh air through said air-to-air heat exchanger via said fresh air inlet and said fresh air inlet ducting into said mixing chamber;
• a weighted modulating air damper device, arranged to modulate the flow rate of the fresh air drawn into said mixing chamber via said air-to-air heat exchanger;
• a mechanical vapor compression based heating and cooling means positioned between an indoor return air duct and said indoor supply air duct, for selectively heating or cooling air;
• and
• a heat recovery ventilation system, wherein stale air is drawn into said indoor stale air return ducting by a dedicated stale air exhaust fan, continuing through said air-to-air heat exchanger where the heat energy of the stale air is transferred to the cooler fresh air to eventually be expelled to the outside of said space via said stale air exhaust ducting and said stale air exhaust outlet, so that stale air is not mixed with fresh air nor with occupied space return air, and where said mixing chamber further mixes and distributes heated or cooled fresh air from said heat recovery ventilation system and said vapor compression system.