Everything an MEP engineer needs — in one workspace.
Each tool is built around accepted engineering standards and produces results you can drop directly into a tender, a hand-over or a design submission.
HVAC cooling & heating load
Quick room-by-room sizing for residential, commercial, retail and kitchen / restaurant spaces.
- Total kW, TR, sensible & latent split
- Fresh-air & exhaust (ASHRAE 62.1, IMC)
- Supply CFM and suggested duct diameter
- Auto-suggested AC type per room
Duct sizing (SMACNA)
Equal-friction sizing with both round and rectangular outputs and recommended velocity bands.
- Round Ø and rectangular WxH suggestions
- Pressure drop per meter & velocity check
- Pressure & seal class guidance
- NC target reference (ASHRAE HOF)
Pipe & pump
Chilled-water flow, friction loss, pump shaft / motor power and NPSH safety margins.
- Pipe size for target velocity / dP
- Hydraulic & shaft power calc
- Affinity laws (Hydraulic Institute)
- NPSH check (HI 9.6.1 / ASHRAE)
Electrical & cable sizing
Power · Volt · Amp solver, cable sizing per IEC/NEC, voltage drop and ampacity checks.
- Single & three-phase, configurable PF
- Cable size with derating & VD %
- Suggested breaker (next standard)
- OK / FAIL badges per check
DB schedule & Single-Line Diagram
Build a Distribution Board with diversity, then auto-render a tidy SLD with icons & legend.
- Lights / Sockets / HVAC / Heaters / Motors
- Connected & demand load (diversity)
- Auto SLD with circuit icons + legend
- Per-DB print / PDF export
Engineering unit converter
SI ↔ Metric ↔ Imperial conversions across mechanical, HVAC, electrical and fluids.
- Power (kW · TR · BTU/h · kcal/h)
- Airflow (CMH · CFM · L/s)
- Pressure (Pa · bar · psi · in.WG)
- Voltage, current, viscosity, density & more
AI equipment & supplier finder
From your calculated totals, get right-sized equipment selection and a regional supplier shortlist.
- Chiller / AHU / FCU / VRF / Pump / CT
- Reputable manufacturer suggestions
- Website, email, phone where known
- Embedded inside the project report
Reference formulas & user guide
Every calculator shows the underlying formulas with citations to ASHRAE / SMACNA / IEC.
- CLTD/RTS, Darcy-Weisbach, Huebscher
- Equal-friction & duct velocity bands
- In-app user guide for every feature
- Disclaimer included on every output
Projects, records & PDFs
Save projects, view & print reports, edit details and regenerate any time.
- Per-user workspace with RLS
- Edit inputs & regenerate reports
- A4 print-ready PDF download
- Project records list & filter
Reports your client will respect.
Every project becomes a branded, print-ready PDF report with totals, room schedules, equipment selection, supplier shortlist and a clear disclaimer footer.
- A4 print layout with totals & room schedule
- AI-suggested equipment selection embedded
- Edit inputs and regenerate any time
- Liability disclaimer auto-included
See it on your next project.
Free for 7 days — no credit card. Choose Starter or Pro after admin approval.