apparatus , systems and methods of using 70 cfm ventilation fans with heaters for bathrooms having depressibly engageable and depressibly releaseable light covers . the novel ventilation fans and heaters can be mounted to structure in ceilings and inside walls with telescoping suspension brackets that are affixed directly to separate sides of the housing to support the housing against joists and structural supports behind the ceiling . adjustable louvers on the grill cover allow for outgoing heated air to travel in a different direction into a space from the incoming air travelling into the housing . plastic type housings around blower wheels reduce undesirable noise effects . light covers can be easily opened and closed by using depressible engageable fasteners , and depressible release fasteners .