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<br /> A Penton Publication www.contractormag.com JANUARY 2012<br /> PLUMBING | PIPING | HYDRONICS | RADIANT | BATH/KITCHEN | TECHNOLOGY | TOOLS | TRUCKS | GREEN | MANAGEMENT<br /> The Vault allows technicians to<br /> isolate any of the 133 geothermal<br /> loops for maintenance or service.<br /> DeHart AC & Mechanical helps<br /> Metro Tech earn LEED gold<br /> BY STEVE SPAULDING OF CONTRACTOR'S STAFF<br /> ClimateMaster rooftop units.<br /> OKLAHOMA CITY, OKLA. —<br /> DeHart Air Conditioning and<br /> Mechanical, headquartered in<br /> Chickasha, Okla., is a fourth-gen-<br /> eration success story. “My grand-<br /> dad started the company in 1920<br /> as a sheet metal contractor,” said<br /> Mark DeHart, company GM.<br /> Mark DeHart joined the com-<br /> pany after he graduated from Okla-<br /> homa State University and now<br /> works alongside bot<a title="January 2012 - sample page 1" href="http://viewer.zmags.com/publication/57e2ca69?page=1"> A Penton Publication </a> <a title="January 2012 - sample page 2" href="http://viewer.zmags.com/publication/57e2ca69?page=2"> For information circle 201The JM-1450 Jet-Set "cu</a> <a title="January 2012 - sample page 3" href="http://viewer.zmags.com/publication/57e2ca69?page=3"> Features & Departments Industry News 5 </a> <a title="January 2012 - sample page 4" href="http://viewer.zmags.com/publication/57e2ca69?page=4"> For information circle 202Some manufacturers occa</a> <a title="January 2012 - sample page 5" href="http://viewer.zmags.com/publication/57e2ca69?page=5"> Industry News A jobsite of seismic proportions</a> <a title="January 2012 - sample page 6" href="http://viewer.zmags.com/publication/57e2ca69?page=6"> Industry News IAPMO GTC tackles energy, water </a> <a title="January 2012 - sample page 7" href="http://viewer.zmags.com/publication/57e2ca69?page=7"> For information circle 203The new degree of comfo</a> <a title="January 2012 - sample page 8" href="http://viewer.zmags.com/publication/57e2ca69?page=8"> Industry News Contractors remain optimistic, y</a> <a title="January 2012 - sample page 9" href="http://viewer.zmags.com/publication/57e2ca69?page=9"> THIS VISE RULES The Emerson logo is a trademark </a> <a title="January 2012 - sample page 10" href="http://viewer.zmags.com/publication/57e2ca69?page=10"> Industry News N. J. fire sprinkler bill is up </a> <a title="January 2012 - sample page 11" href="http://viewer.zmags.com/publication/57e2ca69?page=11"> For information circle 206XXXADVANCED HYBRID WATE</a> <a title="January 2012 - sample page 12" href="http://viewer.zmags.com/publication/57e2ca69?page=12"> Industry News PERC begins drainline carry rese</a> <a title="January 2012 - sample page 13" href="http://viewer.zmags.com/publication/57e2ca69?page=13"> Industry News DeHart AC & Mechanical helps Met</a> <a title="January 2012 - sample page 14" href="http://viewer.zmags.com/publication/57e2ca69?page=14"> Management by Al Schwartz Plumbing contractor </a> <a title="January 2012 - sample page 15" href="http://viewer.zmags.com/publication/57e2ca69?page=15"> When the job calls for yellow CSST, there’s only </a> <a title="January 2012 - sample page 16" href="http://viewer.zmags.com/publication/57e2ca69?page=16"> Heat Pump Technology Cool at theY</a> <a title="January 2012 - sample page 17" href="http://viewer.zmags.com/publication/57e2ca69?page=17"> Heat Pump Technology drich told CONTRACTOR </a> <a title="January 2012 - sample page 18" href="http://viewer.zmags.com/publication/57e2ca69?page=18"> Heat Pump Technology drawing the plans for </a> <a title="January 2012 - sample page 19" href="http://viewer.zmags.com/publication/57e2ca69?page=19"> THE DRIVING FORCE FOR SAFER GAS PIPING SYSTEMS! </a> <a title="January 2012 - sample page 20" href="http://viewer.zmags.com/publication/57e2ca69?page=20"> Plumbing by Dave Yates Plumbing contractor S</a>