The best M&E design companion

Built by MEP engineers - standards-aware tools for building services design.

Interested? Join the pool to trial BuildFlo.

Yellow service pipes on a concrete wall

What is BuildFlo?

Your design companion for building services. Pull in only the modules you need - technical Q&A with cited standards, compliance checks, drawing QA, calculators, fee proposals, and more.

  • Building services chatbot
  • Ask technical questions with technical answers
  • Automating repetitive tasks like drawing issue sheets

Basically giving you back your design time.

Ask a real MEP question. See how it answers.

Try 3 examples left below - sign up to ask your own questions.

Why BuildFlo?

Technical Q&A

Preview · restricted demo

BuildFlo

Press send to try a sample answer

Same chat surface as the app - three example questions, then sign up for full access.

White industrial pipes and ductwork
Steel pipes and cable trays overhead

Tools built for building services engineers.

Get precise answers, not guesses.

BuildFlo knows UK standards in depth - Part F, Part L, BS 8558, and more. Ask about flow rates, U-values, pipe sizing, or SFPs, and get answers that cite the actual standard and clause.

Chat

Riverside Residences

BuildFlo
What's the SFP limit for a supply + extract MVHR unit?
Part L 2021 · NCM / SAP 10.2

MVHR units must not exceed 1.5 W/(l/s) specific fan power. Good practice targets ≤0.8 W/(l/s) at design duty - check the Eurovent-certified data sheet.

Sources

Part L 2021
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General AI guesses. BuildFlo checks.

ChatGPT knows the internet. BuildFlo knows Part F, Part L, and British Standards - and shows you the source before you rely on the answer.

Generic AIMay use your chats and uploads to improve future models
BuildFlo · Your data stays yoursNever used to train our models - your projects, chats, and uploads stay registered to you alone. Delete anything, anytime.
Generic AIBlends training data into a plausible-sounding answer
BuildFlo · Answers you can verifyAnswers from indexed UK standards and cites the clause.
Generic AIStays confident even when it's wrong
BuildFlo · Honest when uncertainDoesn't guess, says when it doesn't know the correct answer.
Generic AIForgets your firm's documents between chats
BuildFlo · Your project contextWorks directly against your drawings and specs.
Generic AINo compliance framing
BuildFlo · Compliance-firstBuilt-in UK regs and standards checking.
Rooftop HVAC units and plant

Run a sizing check yourself.

Pipe or circular duct sizing - same calc engine as the app.

Pipe size calculator

Inputs

Pipe material

BS EN 1057 copper tube outside diameter

Fluid

Results

Enter flow rate to size pipework

Returns recommended size, velocity, and pressure drop.

View more calculators

U-values, MVHR, lux, cables, and more - sign up for the full suite.

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Fee proposals

Bid in 3 minutes - not 2 days.

Same way you already scope a job - just without the two-day grind. Drop the pack. Walk away with a client-ready proposal.

New fee proposal

Enquiry and drawings → priced MEP fee.

  1. Upload
  2. Review
  3. Price

Client enquiry

Food hall, 185 High Street - Stage 3-4 M&E quote.

Drawings & pack

Browse files

Click to try a sample pack

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