Carnet
Nothing gets lost
Your exchanges stay, grouped by date. Pick up the conversation from three weeks ago, rename it, delete it.
For the job, not for the office
The right value, or nothing at all.
Hey JP answers with the exact passage from the manual — make, model, page. And when he does not have it, he tells you, instead of inventing a figure you would carry down to the boiler room.
Boiler output
NBN B 62-30111.28 kW
Recommended output
- Heating output
- 8,40 kW
- Hot-water output
- 1,00 kW
- Total output
- 9,40 kW
- Installer margin
- +20 %
A real calculation: 140 m², K35 (EPC C), no heat-recovery ventilation, hot water for 4. A field estimate — it does not replace an NBN EN 12831 calculation or an EPC audit.
01Every answer shows the document and the passage it came from. Open it, check it.
02Seven deterministic calculators. Same inputs, same result, every time.
03No reliable manual on file? He abstains, and says so in writing.
Today, the first time you sign in
Seven calculators, seven standards.
Not an AI that “estimates”. Arithmetic over Belgian standards, which refuse rather than hand you a doubtful figure. Click a tool to watch it run.
Boiler output140 m², K35 → 11.28 kW recommended
Ventilation flow rates2 rooms → 173.9 m³/h supply
Duct sizing174 m³/h → Ø 160 mm standard size
Gas installation compliance0.755 mbar of 1 → verdict COMPLIANT
Maximum pipe length24 kW in Ø22 copper → 12.9 m maximum
Expansion vessel30 kW, 7 m static head → 27 l minimum
Radiators1500 W at 55/45 → 2950 W in the catalogue
The proof
He would rather say nothing.
Two questions, one after the other. The first he answers from the manual, page and all. The second he does not have — so he says so, instead of inventing a figure you would carry down to the boiler room.
Vitodens 200-W on natural gas E — what CO₂ should I read at full load?
Between 7.5 % and 9.0 % CO₂, with the appliance running steady at full load.
Open the source and read the passage yourself before you touch the gas valve.
Viessmann Vitodens 200-W · service instructions, p. 46
My boiler shows fault code E10, what do I do? — It is a Vitodens 200-W.
I do not have any information on code E10 for the Vitodens 200-W in my documentation.
Check the manufacturer's manual or the machine's service handbook for the exact meaning and the troubleshooting procedure.
No reliable source → Hey JP abstains
Your documentation
Your own manuals, in his answers.
Manufacturer documentation does not cover everything. Your internal procedures, your job sheets, the manual for a machine only you service: drop them in, and Hey JP answers from them.
- 01
Drop the manual in
PDF, Word or image, 25 MB per file, several at once. You fill in the make, the model and the year, and you choose whether the document stays with your company or goes to the community.
The document waits, its fields filled in, before you send it. - 02
It joins the base
Processing starts on its own. Every document shows its state — pending, processing, ready — with its make, its model, its size and who added it.
“1 document added. Processing starts.” - 03
Ask your question
Hey JP answers from your document and shows which one. You open the source to read the exact passage, and you decide.
The answer, and beneath it the document that produced it.
Calculators
In the same conversation
The ƒ(x) button in the composer opens a calculator, and its result goes into the exchange — assumptions and warnings included.
Roadmap
In the workshop.
What is being built right now, and what each one will change in your day.
Coming
Hands-free and off-network
Voice control for the boiler room, and the brands you work with kept on the device when there is no signal.
- Ask out loud, hands still in the boiler
- The answer read back to you, phone left in your pocket
- Your reference brands kept on the device, readable with no signal
Coming
Scheduling and team
Appointments per engineer, statuses, durations — office and field on the same view.
- The day's appointments per engineer, with the address and the installation
- A status you move from the van: on the way, on site, done
- The office sees what the van sees, without calling
Coming
Client records and compliance
Every client, their installations, and everything already done to them.
- One record per installation: nameplate, brand, model, year, category
- The history of past visits, with the photos taken on site
- What was set last time, in front of you before you go back down
Coming
The certificate signed before you leave the cellar
Hey JP will pre-fill the regulatory certificate. You will confirm it, the client will sign it.
- 01Photo of the nameplate → brand, model, type code, year, category
- 02Photo of the analyser ticket → CO, CO₂, O₂, flue temperature, efficiency
- 03Photo of the installation → timestamped, archived
- 04Verdict COMPLIANT / NON-COMPLIANT, with the threshold detail behind it
- 05The client signs on screen → certificate sent by email, invoice behind it
Gas (Cerga) and oil (Cedicol) certificates, under Walloon AWAC regulation.
Pricing
What HeyJP costs
The plans on sale, at the price the product will actually charge — pick one and your workspace is ready in minutes.
In every plan
- The seven calculators, each naming the standard it applies
- Every answer opening on the passage it came from — or no answer at all
- Your own manuals and procedures, answered from like the rest
- Your own workspace address, and the people you invite onto it
Prices exclude VAT. Nothing to pay here: a paid plan asks for payment at your first sign-in, a free one never asks at all.
Ready
Ask the first question.
One manual, one page, one year. See Hey JP answer on your own equipment.