Heater for attachment to clothes dryer exhaust
FIG. 1 is a perspective view of a heater for attachment to clothes dryer exhaust, showing my new design and shown with the front screen opened; 
     FIG. 2 is a front elevational view thereof with the front screen closed; 
     FIG. 3 is a left side elevational view thereof; 
     FIG. 4 is a rear perspective view thereof. 
     The broken line disclosure of a portion of a clothes dryer exhaust pipe in FIG. 3 is for illustrative purposes only and forms no part of the claimed design. The screen and filter elements are shown partially broken away in FIG. 1 for ease of illustration and a complete disclosure.