The same formulas behind MEP Design Platform, free to use for a quick indicative mechanical & plumbing design check.
Storage volume and Legionella turnover check, using the CIBSE/IHVE Plumbing Engineering Services Design Guide method.
Quick sizing for hot water storage vessels against demand.
Velocity and pressure-drop-checked pipe and duct sizing for a given flow rate.
Pipe insulation, duct insulation and room surface condensation risk, against ambient conditions.
Indicative overheating risk score for a room, in the spirit of CIBSE TM59 / Part O — glazing, orientation, shading, fabric, ventilation and gains.
Runs the real CIBSE TM52 adaptive-comfort formulas against actual hourly weather data — upload your own EPW/DSY file, or use an illustrative representative UK region profile. Screening-grade, not a substitute for full dynamic simulation software.
Search any town or city for current conditions and a 3-day forecast — handy for planning site visits, surveys and installs.
Free to use, no sign-up needed — opens in a new tab.
Launch the Calculator