Selection that stays in the project — not in a browser tab.
The configurators from cloudair.tech, with a memory: every item filed under a project, every change kept as a revision, variants side by side in one table, and a report that carries your own logo.
No card. The free plan stays free — one project, five items.
The same calculations as the free calculators — finished into programs.
A configurator is a small selection program, not a calculator box: it walks the geometry, the variants and the duty point, then stores the result together with the version of the calculation that produced it. Changing a formula does not spoil an old quotation — it marks the result as out of date and tells you what to recalculate.
A free account opens all of them. What it does not get are the figures you would put in front of a client: those stay hidden until you pay, and its reports come out marked DEMO.
Pressure differential system
EnterpriseStairwell and lobby pressurisation to EN 12101-6 and EN 12101-13: leakage paths, air balance, door forces, relief and fan selection.
Splitter silencer
readyRectangular splitter silencer: geometry, VDI 2081 pressure loss and flow noise, octave-band attenuation, geometry search.
Air handling unit
in progressAir handling unit: sections, air treatment, pressure balance and energy.
Centrifugal fan impeller
in progressCentrifugal impeller: blade geometry, duty point, power and efficiency.
Four steps, in this order — because that is how a quotation happens.
Project
A folder with a number, a client and a status — from draft, through sent, to won. Everything you calculate lands inside, so six months later it is still clear what those numbers were for.
Items
One selection is one item: silencer TL-01, air handling unit AHU-02. Inputs and result are stored separately, and next to the result stands the version of the calculation that produced it.
Revisions
Every save leaves a revision. The client asks about the variant from two weeks ago — you go back to it in one click, without losing what you did today.
Comparison and report
Several variants side by side in one table. Out of it comes a report with your logo, in the units your client works in.
It goes out with your logo, not ours.
Company details are entered once, on the account: name, VAT number, address, footer and accent colour. The logo goes up as a PNG or an SVG, and from that moment every report looks like your document — because it is one.
Selection report · 2026-001
| Item | TL-01 |
|---|---|
| Volume flow | 12,000 m³/h |
| Pressure drop | 180 Pa |
| Gap velocity | 9.9 m/s |
| Attenuation at 250 Hz | 34 dB |
| Self-noise LWA | 62 dB(A) |
The unit is a display setting. The number underneath never moves.
Every value is stored and calculated in SI base units, and converted once, on the way to the screen. Rounding happens there too — so a duct does not lose a millimetre because a colleague works in inches, and a pressure drop of 145.6 Pa does not become “0” for anyone who reads it in kPa.
The same saved item, opened by two people on one account: 12 000 m³/h · 145.6 Pa · 1200 mm and 7 063 CFM · 0.585 in. wg · 47.24 in — one row in the database, two display settings, and the conversion table comes from the same API the calculation does, so a report and the screen cannot drift apart.
The interface is in English. More languages come once the configurators are in daily use — a half-translated technical term is worse than an English one.
Five plans, because this work has five shapes.
Free opens every standard tool with the key figures hidden. Plus is one engineer with every figure visible. Pro is a team, and the report starts carrying your logo instead of ours. Catalog is for manufacturers and suppliers: your own product range inside the selection tools, published to whoever you choose. Enterprise is the whole company — and the only plan with the pressure differential designer.
Free
one person
- projects: 1
- items per project: unlimited
- exports per month: 3
- results: key figures hidden
- report: marked DEMO
- your own branding: no
- API access: no
- support: community
Plus
one person
- projects: unlimited
- items per project: unlimited
- exports per month: unlimited
- results: every figure
- report: clean, CloudAir branding
- your own branding: no
- API access: no
- support: e-mail
Pro
3 people included, then 69 € per person per month, up to 10
- projects: unlimited
- items per project: unlimited
- exports per month: unlimited
- results: every figure
- report: your logo and footer
- your own branding: yes
- API access: no
- support: next working day
Catalog
5 people included, then 29 € per person per month, up to 25
- projects: unlimited
- items per project: unlimited
- exports per month: unlimited
- results: every figure
- report: your logo and footer
- your own branding: yes
- API access: yes
- support: next working day
Enterprise
everyone in the company
- projects: unlimited
- items per project: unlimited
- exports per month: unlimited
- results: every figure
- report: your logo and footer
- your own branding: yes
- API access: yes
- support: contract with SLA
- pressure differential designer, EN 12101
- API with documentation
What actually differs
| Free | Plus | Pro | Catalog | Enterprise | |
|---|---|---|---|---|---|
| Projects | 1 | unlimited | unlimited | unlimited | unlimited |
| Selections ready to load | 2 | unlimited | unlimited | unlimited | unlimited |
| Results | key figures hidden | every figure | every figure | every figure | every figure |
| Report | marked DEMO | clean, CloudAir branding | your logo and footer | your logo and footer | your logo and footer |
| Exports per month | 3 | unlimited | unlimited | unlimited | unlimited |
| Your own branding | — | — | yes | yes | yes |
| Seats included | 1 | 1 | 3 | 5 | unlimited |
| Own product range | — | — | — | yes | yes |
| Publish products | — | — | — | to everyone | to everyone |
| Product variants | — | — | — | 500 | unlimited |
| API | — | — | — | yes | yes |
| Support | community | next working day | next working day | contract with SLA |
Selecting from a published catalogue stays free on every plan, including Free — the manufacturer pays to publish, not the engineer who specifies.
Every paid plan is billed per company account. Annual billing costs ten months, not twelve. The pressure differential designer is part of Enterprise only — it is the one tool here that carries a project's fire safety case.
Create an account in a minute.
The account belongs to the company, not to a person — colleagues are added later, and projects stay with the company even when someone changes jobs.
You start on the free plan: one project, five items and every configurator marked as ready. Change the plan when you run out of room — not before.