At APR Supply Co., we pride ourselves in providing the best service for our customers, from before your purchase, through your installation and service.  This includes the technical support you may need in servicing the products.  Our goal is to provide you with the technical assistance you need to better serve your customers.  We have a network of experienced and certified technical service advisers (TSA) who specialized in a variety of fields including HVAC, plumbing, controls, and more.  We strongly urge you to reach out and contact anyone of our technical service experts for assistance with your projects.

"Contractors today are eager to resolve issues quickly to help their customers through the resolution of the problem.  The APR TSAs are here to assist them in this need."

Eddie Howell

TSA Group Advisor

APR Supply Co.

Technical Support Resources

Need A/C or Heat Pump troubleshooting assistance?

Download our Refrigerant Flow Chart and complete when contacting the APR Technical Support team for A/C or Heat Pump troubleshooting assistance. This form can be filled out electronically then printed or emailed to the TSA you are working with.

Downloadable Refrigeration Chart    

Technical Support Videos

Watch our own TSA Trainer Eddie Howell describe SuperHeat and SubCooling! For more videos and updates on APR Supply Co, subscribe to our YouTube Channel and Like Us on Facebook!

Frequently Asked Technical Support Questions

Here you can find PDF documents that provide detailed information in relation to some of the most common requests that the TSA Group receives in relation to heating, cooling, plumbing, and controls.  Click any of the images below to access the PDF document.

A/C Superheat and Sub-Cooling & Delta TChecking Firing RateGas Pipe SizingProper Temp on Split Furnaces
Gas Furnace and Boiler QuestionsWater Coil Low Ambient TemperatureVenting DO NOTSSizing for Air Supply Combustion/Ventilation

Meet and Contact the Team

The APR Supply Co. TSA Group

APR Supply Co. is proud to provide our customers with technical support.  Each one of our technical service advisers is well versed in product knowledge and brings a wide variety of skills and experiences to any technical support situation.

Mark Elmer



Mark Elmer  Technical Service & Training Manager | 31 Industry Years | 3 Years at APR Supply


Former Residential HVAC contractor. 5 NATE certifications, Maryland and Delaware master HVACR license. Specializes in Troubleshooting hydronics, oil and gas boilers, Geothermal systems, Air conditioning and heat pumps.



Eddie Howell



Eddie Howell - TSA Training Manager | 40 Industry Years (18 at Losch PLB & HTG) | 24 Years at APR Supply


Nortek TSA, NATE Certified in 4 disciplines (A/C, HP, Gas Furnace, Oil and Gas Hydronics), RSES Member, OESP Local Chapter, Trainer at NAOSHM 2011, HVAC and Plumbing Instructor Training 2007-Current.

17172745999 x 4177

Steve Howell


Steve Howell - TSA | 24 Industry Years (10 at Losch PLB & HTG / Schuykill Sales) | 14 Years at APR Supply

Central and Eastern PA and NJ (Corporate Office)

Specializes in Control Wiring, Heating, Air Conditioning, Boiler Controls, Gas Pipe Lines, Radiant Heating, circulators, Nordyne, Manual J Calculations, Duct Design

17172745999 x 1057

Jeff Andrews


Jeff Andrews - TSA | 18 Industry Years | 5 Years at APR Supply

Central PA (Harrisburg PA)

Specializes in: Boiler Controls, Gas Pipe Lines, Radiant Heating, Circulators, Nordyne, Manual J Calculations, Duct Design

17172745999 x 4079

Luke Metzger


Luke Metzger - TSA | 17 Industry Years | 4 Years at APR Supply

Western PA (Greensburg Branch)

Specializes in heating, air conditioning, low voltage controls, oil burner controls and trouble shooting.

17172745999 x 4725

"To successfully distribute technical equipment product, price and people make up the value of a trade partner. Having a quality product at a fair price is expected. Having quality people to assist in application, installation, maintenance and trouble shooting is the exception.  APR Supply has invested heavily in factory training quality individuals. Their wide foot print makes them a  natural extension of our technical service departments.  We are pleased to partner with APR Supply and grateful for their commitment to support the products they distribute."

Dennis Stinson
HVAC Department Manager
Harry Eklof & Associates