As an HVAC Contractor
I chose the HVAC curriculum in high school, and after graduating, I entered the Air Force for 4 years. I was active in the Heating and Air Conditioning trades before retiring at the end of 2020, having spent a little over 51 years in the field (as of August 2025). Spent the next 11 years as a technician installing and servicing gas, oil furnaces and boilers along with solar, air conditioning, and heat pump equipment. Then 9 years as a Service manager at a large oil company.

The Manufacturer Level
2 years as a manufacturer of heating equipment in technical services Managed tech services for 1 year 25 years as Training Manager & Technical Services associate. Experience: I performed Manual J heat losses for over 30 years, created wiring and piping diagrams, and developed PowerPoint presentations. Additionally, I trained our new service technicians and traveled extensively across the US and Canada, training well over a ten thousand contractors, reps, and distributors. I authored technical articles for over four years for "The US Boiler Report" and "Burnham Heating Helper" and still maintain the Comfort-Calc website.

Updated 9/2026.

Home Owner - looking to learn more about their Heating Systems

New and Seasoned HVAC Contractors

from Seminars and over 300 drawings and Blogs

Engineer and Designers

from Tech information, Charts, and Blogs

Updated 9/2026

Home Owner
FAQ---Why do a Manual-J heat loss
FAQ ---Cast Iron Boilers - Mid Efficiency Range
FAQ---High Efficiency Boilers 90% Efficient Range
FAQ ---Steam Boilers and Steam Systems
FAQ---Air onditioning
FAQ---Air-Air heat Pumps
FAQ---Air-Water Heat Pumps
FAQ---Our Blog Index

HVAC Contractors

Mid Efficiency Cast iron Boiler Index
High Efficiency Boilers 90% Efficient Range
Steam Boilers and Steam Systems
Domestic Hot Water Coils and Indirect Water Heaters
Boiler troubleshooting Techniques General Hadronic Components and Controls - Hydraulic Separators, Buffer Tanks, Purging, Expansion Tanks, Relief Valves, Circulator Sizing, Zone Valves, Monoflo Systems and Outdoor Reset
Service and Venting of Cast Iron Boilers
Water Volume Steel, Copper Pipes and Cast Iron Radiators
Air-to-water Heat Pumps
Air-to-Air Heat Pumps
O2 to Co2 Conversion Charts
Fuel Pump Pressure Nozzle Flow Cart
Blogs---Our Blog Index

Engineers and Designers

Area of Round Ducts
BTU Loss From Copper Pipes
BTU Loss From Steel Pipes
Water Volume Steel, Copper Pipes and Cast Iron Radiators
O2 to Co2 Conversion Charts
Fuel Pump Pressure Nozzle Flow Cart

Updated 9/2026