TermoCalc calculates and draws radiator and underfloor heating systems. Upload the architect's floor plan, the AI reads the rooms, and the software sizes the pipework, the equipment and the materials.
Built for heating installers. Runs in your browser, nothing to install. You hand over a calculation report, a quote, a client report and a 3D view.
The same floor plan, the same rooms and the same heat load work for either system. Pick the project type and the editor loads its emitters, its pipe network, its takeoff and its reports.
Heating with sectional radiators and towel rails, with boiler and manifold.
Underfloor heating with PEX or PE-RT, manifolds and circuits routed automatically.
The same two-storey house, done with radiators and with underfloor heating. Recorded in the real app, with the AI room detection and the assistant's answers exactly as they came out.
A two-page PDF turned into two floors, rooms read with AI, boiler, manifold and 14 radiators, pipework routed automatically, the assistant, the calculation report, the quote, the client report and the 3D view.
Client, company and prices are examples. The floor plan is a sample.
The same floor plan with underfloor heating: the circuit router on both floors, a no-pipe zone, a circuit adjusted by hand, the assistant applying changes with one button, the EN 1264 calculation report, the quote and the client report.
Client, company and prices are examples. The floor plan is a sample.
Each step builds on the one before. Change something and everything updates on the spot: heat load, flow rates, pipe sizes, materials and the quote.
The floor plan can be a PDF, a DXF or an image. A multi-page PDF becomes several floors, one per page. Calibrate the scale with two clicks on a dimension and align the floors with each other, so the risers land in the right place.
Instead of drawing the rooms one by one, you ask the AI: it looks at the plan, finds walls, doors and windows, and proposes each room with its name, its area and a confidence score. It also reads a dimension and checks the scale you calibrated.
The winter heat load is calculated by volume, for a quick figure, or by envelope: walls, windows, roof and floor on each side, with their materials and orientation.
Place the boiler and the manifold with one click. Each radiator is sized from its room's heat load and tells you how many sections it needs; if a room needs more than 12, the software tells you how many radiators to split them across.
Auto-routing builds the network across every floor and the engine calculates it section by section. Everything can be corrected by hand, and you can go back to automatic with one button.
From the manifold to each radiator, star or parallel. Flow rate and pipe size for every section, index circuit and pump.
A four-step wizard: boiler, manifolds, layout and review. Before applying, it warns about circuits over 100 m or manifolds with more than 12 ports.
Diagnostics checks the whole project and flags every issue with its location: a closed loop in the network, a room that isn't covered, a radiator with more than 12 sections. The calculation report sizes the system: total load, flow rate, boiler, expansion vessel and pump, and for each room its output and floor temperature against the standard's limit.
Every metre of pipe, every elbow, tee and Eurocone fitting, the manifolds and the equipment come straight from the drawn project. Pick the brand and the jointing system, and the quote uses your prices. Add your labour, your margin and any extras.
The AI chat answers with the numbers TermoCalc has already calculated. Ask it about a room, the boiler or a diagnostics warning, and when it can, it proposes the change with a button that applies it on the plan.
Both bathrooms are at 20 cm spacing. Switch them to 15 cm, they don't have much free floor area.
Ready to apply in both bathrooms. Heads up: at 15 cm spacing they exceed the standard's output limit, 88 W/m² (76 kcal/h·m²).
Apply to Ground-floor bathroom Apply to Upstairs bathroom
Does bedroom 2 cover its heat load with underfloor heating? What floor temperature will it have?
Yes: it delivers 72 W/m² (62 kcal/h·m²), under the limit, with water at 43 °C. Worth checking the envelope.
Open the envelope
Is a 24 kW (20,600 kcal/h) boiler enough for the whole house? And what pump do I need?
Plenty: the design output is 10.8 kW (9,300 kcal/h). The pump: 1,020 l/h at 1.75 m head, same as in the calculation report.
Everything comes from the same results: change the project and the report, the isometric and the 3D change with it.
A PDF with your company on the cover, the installation plan for each floor, a sheet per circuit, the isometric, the calculation report and the quote with labour, margin and VAT.
Rotate it, zoom in and filter by floor.
They see the plan and the 3D on their phone, no account needed.
The installation schematic with pipe sizes, equipment and floors.
Pipe in coils and lengths with part numbers, manifolds and radiator sections.
Load, flow rate, boiler, expansion vessel and pump, room by room.
A technical report with the design conditions, heat loads, network, equipment and calculation assumptions. The installation plan as a layered DXF for AutoCAD, the isometric as SVG, and the full project as JSON.
Every engine is built on standards, published references and manufacturer data, and is covered by tests that pin down each result, including edge cases and real projects.
| Engine | What it calculates | Basis |
|---|---|---|
| Heat load | Winter load by volume or by envelope, with U-value tables and safety margins. | Envelope, residential and commercial |
| Emitters | Radiator sections and underfloor heating output: W/m² (kcal/h·m²), allowable surface temperature, water temperature required and floor covering. | EN 442 and EN 1264 |
| Hydraulics | Network per floor and risers, flow rates, pipe sizes by velocity, pressure drop, index circuit, balancing, pump, boiler and expansion vessel. | Darcy-Blasius |
| Floor circuits | Spiral with interleaved flow and return or serpentine, tails to the manifolds, detours around no-pipe zones and circuits pinned by hand. | Multi-manifold |
| Takeoff | Metres of pipe measured on the drawing including rises, fittings at every node, manifolds, emitters and equipment. Pipe is grouped into coils and lengths, with weight. | Ofitt, Raubasic and your catalogue |
You pay for the type of system you design, monthly or yearly. It is not an automatic debit: when it expires, you renew. Before paying, try it free with a demo.
Radiator and towel rail heating: room-by-room heat load, sections, pipework, boiler, expansion vessel and quote.
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Request a demoUnderfloor heating with manifolds and automatically routed circuits, EN 1264 check, pipe take-off by coil and quote.
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Request a demoRadiators and underfloor heating in one account, for projects that combine both systems.
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Request a demoPrices in Argentine pesos. Payment through Mercado Pago: card, account balance or cash. If you do not have an account yet, request a demo and pay from the app afterwards.
No. TermoCalc is built for the installer who knows heating: the workflow follows the order of a real project, from floor plan to quote. There's also a chapter-by-chapter video course.
PDF, DXF (AutoCAD) or image. A multi-page PDF loads as several floors, one per page. Calibrate the scale on a dimension and you're done.
No. The calculations are done by TermoCalc's engines, using standards and manufacturer data. The AI helps you read the rooms off the plan and answers your questions with the numbers the software has already calculated. Whatever it proposes, you review and apply.
Yes. Pipework and underfloor heating circuits can be edited by hand: move vertices, split and join sections, change pipe sizes or move a circuit to another manifold. And if you're not happy with it, go back to automatic with one button.
A PDF report with your company on the cover, the installation plan, the calculation report, the isometric and the quote; plus a link where they can see the project and the 3D view on their phone.
Yes, the installation plan exports as DXF, with its layers.
Fill in the form and we’ll set up a trial account so you can do your first project with TermoCalc.
Upload the floor plan, let TermoCalc do the calculations, and hand your client a report with their quote.