Calculators
Balance Point vs Switchover Temperature: Which to Use
Two numbers that get confused constantly and set into the same thermostat parameter. What each one is calculated from, why...
HVAC
Calculators
Calculators
Heat Pump Balance Point Calculator
Calculators
How to Size Combustion Air Openings
Most combustion air work goes wrong in one of three places, and none of them is the arithmetic. It goes...
Calculators
Furnace Backdrafting or Spilling: Combustion Air Troubleshooting
An appliance that spills is not always an appliance with too little combustion air. It is an appliance that, at...
Calculators
Indoor vs Outdoor Combustion Air: Which to Use
The five methods in Section 304 are alternatives, and most installers only ever use one of them. That is usually...
Calculators
Combustion Air Opening Calculator
Calculators
HVAC Flat-Rate vs Time-and-Materials Pricing — Which to Use
Calculators
Common HVAC Job Pricing Mistakes and Fixes
Calculators
How to Price an HVAC Service Call or Job for Profit
Calculators