Commissioning paperwork after the handover
Benchmark forms and service records filled in on your phone at the property, signed on screen, and sent as a PDF the same day — not scribbled up later.
The job management app for heating engineers
Commission boilers and cylinders with proper certificates, size radiators and vessels with built-in calculators, and get the invoice paid before the system's up to temperature.
Free to start · No card · No download needed — works in your browser
The heating paperwork you hand over
Filled on your phone, signed on screen, stored against the job as a proper PDF.
Sound familiar?
The admin headaches every heating engineer knows — solved.
Sizing done on the back of an envelope
Radiator BTUs, expansion vessels, system volume, flow rates — free built-in calculators mean the numbers are right and written down against the job.
Service reminders and repeat customers lost track of
Every boiler swap, service and repair is stored against the customer, so the history is there the next time they call.
Built around a heating engineer’s working day
Commissioning & service certificates
Benchmark central heating commissioning, service & maintenance records and unvented cylinder paperwork — generated as proper PDFs and stored on the job.
Heating calculators in your pocket
Radiator sizing, expansion vessel sizing, system volume, cylinder reheat and flow rate calculators built in — free, with or without a subscription.
Quotes for swaps and full systems
Price up combi swaps, full installs and powerflushes with itemised quotes customers sign digitally, then convert to an invoice in one tap.
Works offline in the plant room
No signal next to the boiler? Certificates, jobs and invoices all work offline and sync later.
Need the full tour? See everything the TradePlanr app does including digital signatures and job sign-offs.
Not the one on the tools? There’s a version of this page for whoever runs the office.
Got engineers on the books? TradePlanr for heating companies and gas firms.
Free calculators every heating engineer can use
No sign-up, no subscription — the same trade calculators built into the TradePlanr app, free on the web.
Gas Rate Calculator
Timed meter test — natural gas or LPG, metric or imperial — with live kW results.
Gas Pipe Sizing (Copper)
Minimum copper pipe size for a load over a run (1 mbar drop, natural gas).
Ventilation Requirement
Free vent area for an open-flued appliance by location.
Radiator / Room Sizing
Approximate heat requirement for a room from its size and use.
Expansion Vessel Sizing
Minimum vessel size for a sealed heating system.
System Volume Estimate
Approximate water content of a heating system.
Cylinder Reheat Time
Time and energy to heat a hot water cylinder.
Flow Rate from kW & ΔT
Required circulation flow for a heat load at a design ΔT.
Radiator ΔT Output Correction
Convert a radiator’s catalogue output to the output at your system’s ΔT.
Underfloor Heating Pipe Length
Estimate UFH pipe length and loop count from floor area and pipe spacing.
Boiler / Heat Pump Sizing
Estimate whole-house heat loss and the boiler or heat pump size to match.
Heat Pump vs Gas Running Cost
Compare the annual running cost of a heat pump against a gas boiler.
Running Cost
What an appliance costs to run at a given tariff.
Unit Converter
Common trade unit conversions.
Markup & VAT
Sell price from cost, markup and VAT.
Job Price / Quote Builder
Build a quote from materials, labour and margin.
Day Rate ↔ Hourly Rate
Convert between hourly, day, week and year.
CIS Tax Deduction
CIS deducted and net pay on a subcontractor invoice.
VAT Flat Rate vs Standard
Compare VAT owed on the flat rate and standard schemes.
Self-Employed Tax & NI
Estimate Income Tax, Class 4 NI and take-home from your annual profit.
VAT Registration Threshold
How close your rolling turnover is to the £90,000 VAT registration threshold.
What Should I Charge?
Work back from the income you want to the day and hourly rate you need to charge.
Late Payment Interest
Statutory interest and compensation you can claim on an overdue commercial invoice.
Deposit & Staged Payments
Split a job into a deposit and staged payments.
Retention (Commercial)
Retention held on a contract and when each half is released.
Mileage / Fuel per Job
Mileage claim or actual fuel cost for a journey.
Real Hourly Rate
Your true hourly rate once travel, quoting and admin time are counted.
Join heating engineers across the UK using TradePlanr
Start free in your browser and set up your first job in minutes — no download needed.