Levenhagen, John I. <br/><br/>
HVAC controls and systems / 
John I. Levenhagen, Donald H. Spethmann. 
 - New York :  McGraw-Hill,  c1993. 
 - xiii, 334 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0070375097 (recycled, acidfree paper) 
<br/><br/><label>LCCN: </label>92025594  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heating--ME<br/>Air conditioning--Control.
<br/><br/><label>Dewey Class. No.: </label>697 LEV