- Home
- Services
- Underfloor Designs
- Quick Calculation
Quick Calculation
Fast sizing and output checks for pricing, feasibility and repeat plot types.
Quick Calculation
Sometimes you need a defensible number in an hour, not a full calculation set in a day. Can this build-up deliver what the room needs? Roughly what manifold size? Is the flow temperature in the right region for the heat pump the client has already bought? These questions come up during pricing and site visits, and waiting on a full design blocks the conversation.
Quick Calculation is scoped for exactly that. Sizing and output checks on established assumptions, with the assumptions listed, returned within hours. It is not a substitute for a BS EN 12831 set and we never present it as one — the deliverable says so on its face.
Where the quick check shows the job is marginal, that is useful information in itself: it tells you which plots need real engineering before you commit to a price.
What you receive
Every item below is issued in your own template, with your layer conventions, title block and revision scheme.
- Indicative heat requirement by room or area
- Achievable floor output check against the proposed build-up
- Suggested pipe centres and indicative loop count
- Indicative manifold size and port count
- Flow temperature range assessment for the intended heat source
- Assumption schedule stating everything taken as given
- Flag list of rooms or areas needing full calculation
- One-page summary suitable for a pricing conversation
Production detail
| Typical turnaround | 2–6 working hours |
|---|---|
| Basis | Established assumptions and manufacturer output data, all stated |
| Not suitable for | Building control submission, MCS documentation, tender-critical sizing |
| Escalation | Converts to full BS EN 12831 calculation on request |
| Output formats | XLSX, PDF one-page summary |
| Revisions | One round included |
Software and formats
We work in your toolchain. If something you use is not listed, ask — the list below is only what we use most.
Frequently asked
Send one quick calculation job and see how we work
Scope, price and programme come back in writing before anything starts. Most first projects are a single deliverable so you can judge us on output, not on a pitch.