Standards Tracker
Track 63 UK building services standards — current editions, status, and relevance ratings.
Open tool →Free Engineering Tools
16 free tools — 7 more coming soon. Calculators, converters, equipment selection, and reference tables for building services engineers. No login, no signup — just useful tools.
Standards Picker
Select your engineering task and instantly see which standards apply, with context.
Open tool →Unit Converter
Convert between kW and BTU, L/s and m³/hr, Pa and mbar, and dozens more.
Open tool →Pipe Size Lookup
Standard pipe sizes for copper, steel, and plastic — OD, ID, wall thickness.
Open tool →Duct Sizer
Quick circular and rectangular duct sizing from flow rate and velocity.
Open tool →ACH Calculator
Calculate air changes per hour from flow rate and room volume.
Open tool →SFP Calculator
Calculate specific fan power and check Part L compliance limits.
Open tool →Ventilation Rates
Fresh air supply and extract rates by room type — from CIBSE Guide A and Part F.
Open tool →Design Temperatures
Internal design temperatures for heating and cooling — winter and summer setpoints by room type.
Open tool →Internal Heat Gains
Occupant, lighting, and equipment heat gains for cooling load calculations.
Open tool →Noise Criteria (NR)
Noise rating criteria by room type — from CIBSE Guide A and BS 8233.
Open tool →Equipment and Selection Tools
Browse real product data and match equipment to your calculated duties — from radiators and boilers to pumps and indoor units.
Equipment Library
Browse specifications from Daikin, Grundfos, Mitsubishi Electric, and more.
Open tool →Radiator Size Finder
Estimate room heat loss and find matching radiators by output rating.
Open tool →Boiler Size Estimator
Estimate total heating load from property size and match to standard boiler outputs.
Open tool →Pump Selector
Enter flow rate and pressure drop to find matching circulator pumps.
Open tool →Indoor Unit Selector
Estimate cooling load or enter a known duty to find matching indoor units.
Open tool →More tools on the way
These are in active development. Want to be notified when they launch?
Heat Loss Estimator
Room-level heat loss calculation with fabric, ventilation, and infiltration losses. Input U-values, areas, and temperatures.
Based on CIBSE Guide A §5 & BS EN 12831
Cable Sizing Calculator
Size cables from current, length, and installation method. Voltage drop check and correction factors per BS 7671.
Based on BS 7671 Appendix 4
NR Curve Checker
Input octave band sound pressure levels and check against NR curves. Visual plot with pass/fail per band.
Based on BS 8233 & CIBSE Guide B5
Water Flow Rate Calculator
Calculate flow rates from heating/cooling loads and temperature differentials for LTHW, CHW, and DHW systems.
Based on CIBSE Guide B1 & Guide C
Thermal Conductivity Tables
Lookup thermal conductivity (λ) values for common building materials — insulation, masonry, metals, glazing.
Data from CIBSE Guide A Table 3.49 & BS EN ISO 10456
MEP Abbreviations & Glossary
Searchable glossary of MEP engineering abbreviations, acronyms, and terms. LTHW, AHU, FCU, SFP, ACH and 200+ more.
Industry standard terminology
Commissioning Checklists
Generate commissioning checklists for AHUs, FCUs, pumps, boilers, and chillers. Download as PDF or print.
Based on BSRIA BG 8 & CIBSE Commissioning Codes
Want the full toolkit? MEP Desk Professional includes 61 calculators across ventilation, heating, cooling, electrical, pipework, ductwork, and more — all connected to your project data with auto-run calculations and clean Excel exports.