Building heat exchange system

A heat exchange system for use in a structure, the heat exchange system consisting of:

• a water tank disposed within the structure adapted to receive water from a water supply;
• an airflow enclosure disposed about the water tank, the airflow enclosure and the water tank defining an airflow passage therebetween for ambient air to flow, the airflow enclosure having an outlet end disposed above the water tank;
• an air fan disposed within the outlet end of the airflow enclosure to move the air through the airflow passage and the warmed air into the air duct;
• an air duct extending from the airflow enclosure;
• an interior branch duct communicating with the airflow enclosure, the interior branch duct adapted to extend into at least one interior of the structure;
• an exhaust branch duct communicating with the airflow enclosure, the exhaust branch duct adapted to extend outside the structure;
• a first selectively operable control switch communicating with the air fan to selectively control the air fan to control moving the air through the airflow passage and the warmed air into the air duct;
• a selectively operable air exhaust valve disposed within the exhaust branch duct to selectively direct the warmed air to exhaust the warmed air from the structure;
• and
• a second selectively operable control switch communicating with the water tank to selectively control a heating of the water in the water tank;
• a selectively operable air outlet valve disposed within the interior branch duct to selectively direct the warmed air to the at least one interior of the structure;
• wherein the ambient air flowing through the airflow passage selectively cools the water tank and the water of excess heat therein and warmed air from cooling is directed from the outlet end of the airflow enclosure to exhaust the warmed air from the structure via the exhaust branch duct, thereby reducing the temperature of the water within the water tank;
• and
• wherein the ambient air flowing through the airflow passage is warmed by heat from water in the water tank radiated by the water tank and the warmed air is selectively directed from the outlet end of the airflow enclosure, via the air duct, to the at least one interior of the structure, via the interior duct, to warm the at least one interior.