HVAC & Climate
BTU sizing, AC energy use, heat-pump, ventilation and room capacity tools.
Air Conditioner BTU Calculator
What AC capacity does my room need?
→Air Conditioner Electricity Cost Calculator
How much electricity and money does an AC use per day or month?
→BTU/h – kW – Ton of Refrigeration Converter
How many kW or tons of cooling is a BTU/h rating?
→Ventilation Airflow Calculator
How much airflow does a room need in m³/h?
→Heat Pump Electricity Cost Calculator
How much electricity does a heat pump use for a given heat load?
→Radiator Sizing Calculator
How much panel-radiator length does a room need?
→Dew Point Calculator
What is the dew point from temperature and relative humidity?
→Air Conditioner Not Cooling – Troubleshooter
The AC runs but does not cool well. What should I check first?
→Air Changes per Hour (ACH) Calculator
How many times per hour is the room air replaced?
→Electric Heating Cost Calculator
How much electricity will an electric heater or heat pump use?
→Room Heating Load Estimator
How much heating capacity might a room need?
→How to use these tools
HVAC capacity depends on more than floor area. Volume, solar gain, insulation, glazing, occupants and equipment loads all matter; critical selections require a proper heat-load assessment.
- Insulation, glazing area and orientation
- Local design temperature and solar gain
- Ceiling height plus people and equipment heat loads
- Real equipment efficiency and installation conditions