HVAC :  heating, ventilating and air conditioning : level four/ 
National Center for Construction Education and Research 
 - Upper Saddle River, New Jersey :  Prentice Hall,  2003 
 - 1v (various pagings). :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0131026127  RM321.60 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heating--Equipment and supplies--Maintenance and repair<br/>Air conditioning--Equipment supplies--Maintenance and repair<br/>Ventilation--Equipment and supplies--Maintenance and repair