Water Pipe Sizing Calculator: Find the Right Pipe Diameter (Free Tool) You are designing a plumbing system or installing a new water supply line. You need to choose the right pipe diameter. Too small, and you get low water pressure, noisy pipes, and erosion. Too large, and you waste money … Read more
Heat Loss Calculator: Size Your Heating System Correctly (Free Tool) You are designing a heating system for a home or building. You need to know how much heat you will lose through the walls, roof, windows, and ventilation. If your heating system is too small, the building will never get … Read more
U-Value Calculator: Calculate Wall & Window Heat Loss (Free Tool) You are choosing insulation for a wall. You see R-19 on one product and U-0.05 on another. Which one is better? You cannot compare them directly because they measure different things. R‑value measures resistance to heat flow (bigger is better). … Read more
R-Value Converter: Compare Insulation & U-Values Instantly (Free Tool) You see “R-19” on a roll of insulation. The building code calls for “R-15” in the walls. But you are looking at a European window with a U‑value of 1.5 W/m²·K. How do you compare them? R‑value and U‑value are the … Read more
GPM to Tons Calculator: Convert Water Flow to Cooling Capacity (Free Tool) You are designing a chilled water system. You know the flow rate is 100 GPM. The temperature drop across the chiller is 10°F. How many tons of cooling capacity does that represent? In the HVAC industry, tons and … Read more
Exhaust Fan CFM Calculator: Size Your Ventilation System (Free Tool) You need an exhaust fan for your bathroom, kitchen, or workshop. You walk into the store and see fans with CFM ratings: 50 CFM, 110 CFM, 200 CFM. How do you know which one is right for your space? Buying … Read more
Humidity Ratio Calculator: Measure Moisture in Air (Free Tool) You walk into a building. It feels damp and clammy. You wonder: how much moisture is actually in the air? Relative humidity tells you a percentage. But it changes with temperature. A 50% RH room at 75°F has more moisture than … Read more
CO2 Ventilation Rate Calculator: Measure Your Indoor Air Quality (Free Tool) You walk into a meeting room. It feels stuffy. People are yawning. You wonder: is there enough fresh air? Carbon dioxide (CO2) is the best indicator of ventilation effectiveness. As people breathe, they exhale CO2. If the CO2 level … Read more
Wet Bulb Temperature Calculator: Measure Humidity & Cooling Potential (Free Tool) You are an HVAC technician. You need to know the wet bulb temperature. It tells you how much moisture is in the air. It helps you size cooling coils. It predicts evaporative cooling performance. Wet bulb temperature is measured … Read more
MERV Rating Filter Selector: Find the Perfect Air Filter for Your Home (Free Tool) You open your HVAC filter compartment. You see a dusty, clogged filter. You wonder: “What rating should I buy? MERV 8? MERV 11? MERV 13?” The answer is not always “the highest number wins.” The right … Read more
