Certification Dealer Name Phone # Diehl's Environmental Services Co. 26 North State Street York, PA 17403 717-846-3384 R.R. Kling & Sons 4522 North Sherman St Ext. Mount Wolf, PA 17402 717-854-4328 R.R. Kling & Sons 4522 North Sherman St Ext. Mount Wolf, PA 17356 717-854-4328 R.R. Kling & Sons 4522 North Sherman St Ext. Mount Wolf, PA 17315 717-854-4328 R.R. Kling & Sons 4522 North Sherman St Ext. Mount Wolf, PA 17345 717-854-4328 R.R. Kling & Sons 4522 North Sherman St Ext. Mount Wolf, PA 17364 717-854-4328 Nabilco Heating & A/C 610 Walnut St. Columbia, PA 17512 717-424-2156 Hanes Mechanical 319 Poplar Street Columbia, PA 17512 717-449-1602 Wilking Mechanical Systems 14382 Curvin Drive Stewartstown, PA 17363 717-933-5358 Orth Plumbing, LLC. 1519 Sheaffer Rd. Elizabethtown, PA 17022 717-361-2536 BrentMore Construction Inc. 117 S WEST END AVE STE 15 Lancaster, PA 17603 717-299-4010 AM/PM HVACR 1269 Woodbine Road Airville, PA 17302 717-870-7818 AM/PM HVACR INC. 1269 Woodbine Rd Airville, PA 17302 717-862-1990 Manor Mechanical 964 Boyce Ave. Lancaster, PA 17601 717-285-4900 Thermotech 803 South 26th Street Harrisburg, PA 17111 717-234-4500 Environment Controls and Service 285 Gates Road Hershey, PA 17033 717-534-8583 Advanced Air Heating & Cooling 1712 Pioneer Rd. Lancaster, PA 17602 717-314-5951 NS Johnson, Inc. 15 Highland Dr. Palmyra, PA 17078 717-838-8000 Steve Buckley's Plumbing Heating 3737 Baltimore PK Littlestown, PA 17340 717 359 5406 Northern Light 1473 West Jarrettsville Rd Jarrettsville, MD 21084 410-391-5775 C&D Sheetmetal 3725 Federal Hill Rd Baltimore, MD 21084 410-557-9927 All Star Refrigeration PO Box 524 Monkton, MD 21111 410-239-8510 Northern Light Heating & A/C Inc. 787 Medinah Circle Westminster, MD 21158 410 391 5775 J.L. Boyer H&C PO Box 1195 Westminster, MD 21158 410-848-5150 Ackerman Plumbing & Heating 10721 York Rd Cockeysville, MD 21030 410-404-8247 Ackerman Heating, A/C & Plumbing 10721 York Rd. Cockeysville, MD 21030 410-404-8247 D & D Ginder PO Box 312 Schafferstown, PA 17088 717-949-8777 J. L. Boyer Heating / Cooling Inc. 1711 Lavtorbach Rd Finksburg, MD 21048 410 848 5150 Triple E Enterprises Inc 516 Main St Reisterstown, MD 21136 410-833-1133 American Air 22 Main Brook Ct Reisterstown, MD 21136 410-702-7837 Allpro Heating & A/C 728 Belair Rd Unit 105 Bel Air, MD 21014 410-836-7955 Farnen & Dermer Inc 10500 Reisterstown Rd Owings Mills, MD 21117 410-902-0020 ACH Mechanical 103 Pinemore Rd Owings Mills, MD 21117 410-902-4600 Atlantic Mechanical Inc 49 Gwynns Mill Ct Owings Mills, MD 21117 410-484-4595 Suburban Energy Services (A+ Dealer GDI) 530 East North Street Carlisle, PA 17013 717-243-5858 Knoche Mechanical 218 Birch Lane Carlisle, PA 17013 717 697 0326 MRD SERVICES 2115 Walnut Bottom Rd. Carlisle, PA 17013 717-448-5081 Blevins Heating and Cooling 2910 Churchville Rd Churchville, MD 21028 410-838-3636 Olympic Heating & AC 114 Belair Rd Kingsville, MD 21087 410-485-0885 R Brooks Mechanical, Inc. 5 Valley View Drive Rising Sun, MD 21911 (410)658-0822 Thomas Air Conditioning Service PO Box 189 Abingdon, MD 21009 410-679-3683 R.A. Norman 9109 Crosshill Rd Parkville, MD 21234 410-296-3136 Olympic Heating & Air Conditioning 11433 Belair Rd. Kingsville, MD 21236 410- 592-7956 Comfort Systems Inc 9111 Perryvale Rd Baltimore, MD 21236 410-529-1879 Adrian Air 9471 Seven Courts Dr Nottingham, MD 21236 410-668-2040 S & K's One Hour Heating & A/C 653 W. Belair Ave Aberdeen, MD 21001 410-272-3800 Fresh Air Heating & A/C 4021 Rosecrest Avenue Baltimore, MD 21215 410-358-2214 D&K Air Systems 5629 Harford Rd Baltimore, MD 21214 410-444-3322 New Covenant 2200 B Philadelphia Rd Edgewood, MD 21040 410-612-0059 J.M. Taylor Inc. 6500 Moravia Park Dr Balitmore, MD 21237 410-325-3300 American Mechanical Repair 180 W Ostend St Baltimore, MD 21237 410-668-4872 Air Tech Refrigeration 404 Bowleys Quarters Rd Baltimore, MD 21220 410-355-3660 Air Tech Refrigeration 404 Bowleys Quarters Rd Middle River, MD 21220 410-335-3660 Shawn W. Frey Contracting SvcLLC 99 SKYVIEW DR SHIPPENSBURG, PA 17257 (717)423-5732 Herbert Collins One Hour Air 2702 Back Acre Circle Mt Airy, MD 21771 301-829-4100 Family Air PO Box 843 Mt.Airy, MD 21771 301-829-9720 E.G. Smith 3333 Penn Ave. P.O. Box 2657 West Lawn, PA 19609 610-670-1000 Environmental Comfort Systems 1201 Bernard Drive Baltimore, MD 21223 410-233-8960 Enviromental Comfort systems Inc. 1201 Bernard Drive Baltimore, MD 21223 410 233 8960 All Comfort HTG & A/C 8404 Cub Hunt Ct. Walkersville, MD 21793 240-285-8669 Clean Air Heating & Air Conditioning 1911 Portal Street Baltimore, MD 21224 410 633 8350 Clean Air 1911 Portal St Baltimore, MD 21224 410-633-8350 All American Mechanical 10690 Clarksville Pike Ellicott City, MD 21042 410-992-8200 All American Mechanical Inc. 3509 Char-lil Ct, Ellicott City, MD 21042 410 992 8200 Bowies Climate Control 410A Hamilton Ave Waynesboro, PA 17268 717-762-4463 Comfort Masters Heating & Cooling 501 Hillside Drive Baltimore, MD 21221 410-687-4554 General Heating & Cooling Inc. P O Box 7819 Baltimore, MD 21221 410 574 6586 Ackerman Heating & A/C & Plumbing 10721 York Rd Cockeysville, MD 21221 410-404-8247 Modern A/C & Heating 627 Eastern Blvd Baltimore, MD 21221 410-574-3007 ABBA Heating 143 Telegraph Rd Coatesville, PA 19320 610-644-3005 T & D Plumbing & Heating Co. Inc 1628 Sulphur Spring Rd Baltimore, MD 21227 410-242-8850 All Seasons H&C 1510 Caton Center Dr Baltimore, MD 21227 410-233-8960 Arnesen Mechanical 7355 Hughes Ave Baltimore, MD 21219 410-477-3965