Is this a design service?

No. You prepare the project yourself in HeatAlgo. You enter and approve the building data, set the drawing scale and draw the zones. The app calculates from those inputs. Review the result with your installer before installation.

What can I see before buying?

You can prepare a project and preview the building summary and one fully calculated room per module. The paid report unlocks the remaining room results, full loop details, the bill of materials and PDF exports for that project.

Does one report cover multiple floors?

Yes, when the floors belong to the same project. Upload a separate plan and draw zones for each floor. Floors imported from the heat loss calculation are created automatically; adding a floor manually requires the project unlock.

What is the maximum loop length?

The limit depends on pipe diameter and includes the run to the manifold. For 16x2 pipe HeatAlgo warns from 80 m (262 ft) and stops at 90 m (295 ft); for 17x2 it warns from 90 m (295 ft) and stops at 100 m (328 ft). A split divides the pipe in the room, not the separate run each loop needs.

When does the download window start?

Each module's 7-day window starts with its own first download, not your payment. During it you can edit and download again. Afterwards, your downloaded files and full on-screen results remain available. A new export needs another report unlock or an active subscription.

Do I need a subscription?

No. One project report costs $32. If you regularly prepare projects, the optional monthly subscription is $129 with unlimited reports while it is active.

Can I use the report for a permit or a rebate?

No. A HeatAlgo report follows EN 12831-1 and EN 1264, not ACCA Manual J, and is not accepted for permits or rebates. It is a plan to discuss with your installer. Ask your local building department what it accepts.

Does it work in feet and °F?

Yes, on screen. Every figure you type or read can be in feet, square feet, °F and Btu/h - an account opened in the US starts that way, and you can switch in Settings. The calculation itself runs to EN 12831-1 and EN 1264, and the PDF report still prints metric units.

Radiant Floor Heating Design & Layout Tool

Give your installer a planwith the numbers behind it.

A printable pipe layout with the calculations behind it.

Printable plan and PDF · $32 · one project

Create an account, prepare your project, then buy the report in the app. Prices are in US dollars and are the total you pay, tax included.

Heating zones and pipe loops on your floor plan
Loop lengths, pipe spacing and flow rates
Room heat demand and radiant floor heating output
A printable plan, a PDF report and a bill of materials with the coil cutting plan

A whole-project report unlocks all modules in one project, and the report, the scaled plan and the bill of materials download together as one ZIP file - the report and the bill of materials on a phone too. A report for this module alone from $19. You provide and approve the inputs; HeatAlgo calculates them. This is a self-service tool, not an engineer preparing a design for you. A HeatAlgo report follows EN 12831-1 and EN 1264, not ACCA Manual J, and is not accepted for permits or rebates.

What to prepare before asking for a quote →

Example radiant floor heating report: two connected pipe loops on a fictional home floor plan — Native HeatAlgo report example: two loops in the living / dining room of a fictional demo home.

What it is

The radiant floor module in HeatAlgo is browser-based design software for hydronic (hot-water) radiant floor heating: zones, loops and output calculations on the building's floor plan, for homeowners and installers. Upload a PDF or image of your plan, set the scale in two clicks, and draw the tubing layout with the calculations updating as you go. It does not design electric floor-heating mats.

Radiant floor heatingdesign software.

What you design, what you need, what the PDF report contains - and what the software does not do.

What you design

Hydronic zones and loops on your floor plan, tubing spacing, the manifold and the runs to it. The module works out loop lengths, flow rates and floor output to EN 1264, for 16 mm pipe - close to, but not the same as, 1/2-inch PEX.

What you need

A plan of each floor (PDF, JPG, PNG, DWG or DXF) and one dimension you know, to set the scale. Each room's heat loss comes from the heat loss calculation or is typed in. The app shows and takes feet, square feet, °F and Btu/h.

What the PDF contains

A scaled plan with the loops, loop lengths, pipe spacing and flow rates, and the floor output beside each room's heat demand. A separate PDF is the bill of materials for the wholesaler: pipe coils with a cutting plan, manifolds, fittings and accessories.

Who it is for

You, if you are building or renovating a home and want to prepare a design before asking for quotes, or check the one your installer sent.

What it does not do

It is software, not a design service: nobody visits the site or signs the design off for you. You enter the inputs, HeatAlgo calculates, and your installer reviews the result before work starts.

After the screed, a layout fixmeans breaking it up.

Without a tool the pipe layout is sketched on paper and the pipe length estimated in someone's head. An error there means buying too much pipe or too little, wrong spacings and cold zones in the floor. The cold zones only show up once the heating runs, when the pipe is already under the screed.

Too much pipe, or too littlethe length estimated in your head, not from the plan

Wrong spacingsone spacing for the whole house, by eye

Cold zones in the floornobody checked whether the floor covers the heat loss

See the wholerun.

The same project twice: once with the sections drawn by hand, once with them proposed by Algo AI. The rest is identical in both - the manifold, the loops, the report and the scaled plan. The same module described below.

All recordings →

English narration, subtitles in ten languages

You draw the sections

The AI proposes the sections

From your floor planto the report.

1 / 3

Algo AI suggests building inputs for you to review

Heating zones drawn on a floor plan in HeatAlgo

HeatAlgo radiant floor heating layout with zones and loops

Stuck on a step?Ask Algo AI.

Ask Algo AI what a setting means or how to read a result. It uses your project data to explain the next step. You review its suggestions; the radiant floor heating module performs the calculations to EN 1264.

Meet Algo AI →

How AI draws the sections from a plan →

AlgoThis projectFeedback

What spacing in a 6 m² bathroom if the heat loss is 480 W?

THINKING

480 W over 6 m² is 80 W/m² - the upper end for radiant floor heating. Start at 10 cm spacing and a 40 °C supply: the module works the zone's output out from the covering, the temperature and the geometry, and the room's screen shows whether it covers the loss. If not, raise the supply or add a towel radiator.

Ask about a zone, a loop or the manifold…

Everything you needfor an radiant floor design.

Drop in the architect's plan as a PDF or photo.

Drop in the architect's file and work directly on the existing plan, no redrawing. Handles PDFs and plain photos of the floor plan.

Scale calibration in two clicks.

Loops generate like a working design.

Calculations update as you draw.

Unlimited undo and redo, automatic saving.

Radiant floor design · your logo

Living room · loop 178 m

Living room · loop 274 m

Kitchen62 m

Bedroom58 m

Σ 16 mm pipe384 m

The report, the plan and the bill of materials.

HeatAlgo vstraditional software.

Traditional software

PriceA per-seat license
InstallationComputer (Windows)
Floor plan importNone or limited
Design on floor planManual drawing
Thermal calculationsOften not included
Undo/redoLimited

HeatAlgo

PricePrintable plan and PDF · $32 · one project
InstallationBrowser
Floor plan importPDF, JPG, PNG, DWG, DXF
Design on floor planYes (draw on imported plan)
Thermal calculationsYes (area, length, power)
Undo/redoUnlimited

Create a free account

Create an account, prepare your project, then buy the report in the app.

Before you prepare the report

AI proposes editable sections with internal pipe layouts from your calibrated plan. You review the outlines it flags and the areas it left without sections. Manifold placement, supply routes and missing engineering inputs remain your next steps. One generation per account is free. The first read of a plan spends it, not Apply: a few corrections and retries of that draft ride on it, and applying the draft costs nothing more. A read that produces no proposal, or a request discarded before any read, gives it back; a draft previewed and discarded, or a read stopped once it has started, does not. Further generations need an active subscription or the project floor-plan access window. Up to 6 starts per hour and one running request protect availability. Exports follow their existing access rules.

How many loopsfor a typical room.

Computed for six room sizes - the loop drawing, the pipe length and the floor output.

12 m² (129 ft²) room3 × 4 m (10 ft × 13 ft)See the calculation →16 m² (172 ft²) room4 × 4 m (13 ft × 13 ft)See the calculation →20 m² (215 ft²) room4 × 5 m (13 ft × 16 ft)See the calculation →25 m² (269 ft²) room5 × 5 m (16 ft × 16 ft)See the calculation →30 m² (323 ft²) room5 × 6 m (16 ft × 20 ft)See the calculation →40 m² (431 ft²) room5 × 8 m (16 ft × 26 ft)See the calculation →

Other tools

Heat Pump Selection10 power classes, radiator check Heat Loss Calculationheat loss to EN 12831-1AI client formclient data without the phone calls

← See all tools

Prepare the plan before installation starts.

A printable heating plan and PDF report for $32, ready to discuss with your installer. One payment covers all modules in your project.

Create a free account See what the report includes

Create an account, prepare your project, then buy the report in the app. 7 days of edits and downloads from each module's first download.