ntegrated heat exchange and storage unit for water heating apparatus, method for its manufacture and water heating apparatus including said unit* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6866036 *Jul 31, 2003Mar 15, 2005Eugene Albert JacobsCooking heat absorberUS7007742 *May 10, 2002Mar 7, 2006Marc DesjardinsMethod and system for pre-heating waterUS7007