Room Ventilation Calculator: Design Healthier Indoor Spaces (Free Tool) You are designing a new classroom. You are setting up a home office. You are renovating a commercial kitchen. How much fresh air do you need? Ventilation is the process of bringing outdoor air into a building and distributing it throughout … Read more
Air Quality Index Calculator: Understand Your Air Quality (Free Tool) You check the weather app. You see a number like 85 or 150 next to “AQI.” What does it mean? Is it safe to go outside? Should you close your windows? The Air Quality Index (AQI) is the standard way … Read more
EER to SEER Calculator: Convert HVAC Efficiency Ratings (Free Tool) You are comparing air conditioners. One has an EER of 12. Another has a SEER of 18. Which is more efficient? You cannot compare them directly. EER and SEER measure efficiency under different conditions. EER is a snapshot at a … Read more
SEER2 Calculator (New 2023 Standard): Convert & Compare HVAC Efficiency (Free Tool) You are shopping for a new air conditioner or heat pump. You see “SEER2” on the label. But you remember “SEER” from before. What is the difference? How do they compare? On January 1, 2023, the U.S. Department … Read more
Refrigerant Comparison Calculator: Compare Efficiency, GWP & Safety (Free Guide) You are choosing a refrigerant for a new system. Or you are retrofitting an existing one. R22 is being phased out. R410A has high GWP. The options are confusing. Refrigerant choice affects efficiency, safety, cost, and the environment. Comparing refrigerants … Read more
R134a Pressure Temperature Calculator: Essential Refrigerant PT Tool (Free) You are working on a car’s air conditioning system. Or a refrigerator. Or a commercial cooling unit. It uses R134a refrigerant. You need to check the charge. You measure pressure at the service port. What is the corresponding saturation temperature? R134a … Read more
R32 Pressure Temperature Calculator: Next-Gen Refrigerant PT Chart (Free Tool) You are working with a newer air conditioner or heat pump. It uses R32 refrigerant. You need to check the charge. You measure pressure at the service port. What is the corresponding saturation temperature? R32 is becoming the standard replacement … Read more
R22 PT Chart Calculator: Pressure Temperature for R22 Refrigerant (Free Tool) You are servicing an older air conditioner or heat pump. It uses R22 refrigerant. You need to check the charge. You measure pressure at the service port. What is the corresponding saturation temperature? R22 (Freon) was the standard refrigerant … Read more
R410A Pressure Temperature Calculator: You are an HVAC technician. You need to check the refrigerant charge. You measure pressure at the service port. What is the corresponding saturation temperature? R-410A is the most common refrigerant in modern air conditioners and heat pumps. Its pressure-temperature relationship is critical for charging, troubleshooting, … Read more
Dew Point Calculator: Calculate Condensation Temperature & Humidity (Free Tool) You wake up. Your windows are covered in water. Your basement feels damp. Your bathroom mirror is fogged. That is dew point. It is the temperature at which water vapor in the air condenses into liquid water. Knowing the dew … Read more
