Levenhagen, John I.    <br/><br/>
HVAC controls and systems /  
John I. Levenhagen, Donald H. Spethmann    
 - New York :  McGraw-Hill  c1993    
 - xi, 334 p.:   ill., photo;   24 cm.    
<br/><br/> Includes index    
<br/><br/><label>ISBN: </label>0070375097    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air conditioning--Control   <br/>Heating--Control