HIU commissioning, without the transcription errors

One mistyped figure means a second visit

This is the specific pain of heat networks. You take a set of readings at the HIU, write them on a sheet, and type them up later. Transpose two digits on a return temperature and the commissioning record is wrong. Someone spots it, and you are back in that riser cupboard on Saturday for a job you already did correctly.

The error is not in the engineering. It is in the copying.

Capture the readings once, where the numbers are

HIU has its own dedicated wizard in Maintivo. It is not a generic form with your logo on it, and you do not have to build it: it is one tap from the home screen, and it walks you through the job in five steps. Job details, FlatStation details, commissioning, measurements, sign-off.

The reading fields are in front of you at the unit. Flow, return, differential pressure, temperatures, all typed once, standing in front of the plate. There is no second pass, so there is nothing to transpose, and the commissioning record comes out the other end as a branded PDF.

Photograph the unit and the serial plate straight into the record. Add any defect with its own photo and the remedial action. The resident or site manager signs on screen and the commissioning record is built as a branded PDF on the spot, ready to send.

Riser cupboards have no signal. That is fine.

Plant rooms, basements and riser cupboards in new builds are exactly where a mobile signal goes to die, and exactly where the readings get taken. The iPhone app works entirely offline. The whole record sits safely on the phone and uploads itself when you walk back out into the daylight. The web app needs a connection and keeps a draft in the browser.

Every flat, the same record

A block of two hundred flats needs two hundred consistent records, not two hundred variations. A shared template means every engineer captures the same fields in the same order, and the developer or housing association gets a set of documents that actually match.

Find the commissioning sheet fourteen months later

When the developer, the client or the insurer asks for the record for flat 43, it is a search rather than a hunt through a shoebox. Every signed sheet and photo is stored against the client and the site in secure, UK-GDPR compliant cloud storage.

Say it, don't type it

Standing at the plate with cold hands, typing is the last thing you want to be doing. In the iPhone app, hold the button and say what you found. It runs on Apple's on-device recogniser, so your voice never leaves the phone and it keeps working in a riser cupboard with no signal, like the rest of the app.

You can dictate a finding. You cannot dictate a reading, flow, return and differential pressure you enter yourself, deliberately. The optional AI that tidies your wording is off until you switch it on, and you see its suggestion before it is used. When you dictate a note, numbers are swapped for placeholders before the text is sent; a typed note is sent as typed. Any suggestion that adds a number is rejected.

And then get paid for it

Signed jobs with nothing billed against them sit in a Ready to invoice list on the dashboard, so a block of two hundred flats doesn't turn into a billing archaeology exercise. Optional add-on, £9.99 a month.