Rosenberg, Paul.      frey50        <br/><br/>
HVAC professional reference / 
 HVAC  Heating, ventilating, air-conditioning professional reference 
[by Paul Rosenberg] 
 - Pottstown, PA :  Pal Publications,  c2005. 
 - Chapter numbered pages (1-11) 
 - The DeWalt trade reference series . <br/><br/> Cover title. 
<br/><br/><label>ISBN: </label>0975970941 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heating--United States--Handbooks, manuals, etc.<br/>Ventilation--United States--Handbooks, manuals, etc.<br/>Air conditioning--United States--Handbooks, manuals, etc.<br/>Heating and ventilation industry--United States--Handbooks, manuals, etc.<br/>Air conditioning industry--United States--Handbooks, manuals, etc.