For installers
Heating calculations and underfloor heating design with a client-ready PDF. In minutes, not weeks.
Heat pump selection with radiator analysis, heat loss calculations, and underfloor heating design. Open your browser, enter the data, get a PDF report you hand straight to the client.
Sound familiar?
Heating calculation software costs anywhere from a thousand to tens of thousands of PLN. It requires training, licensing, and installation on a specific machine. Hundreds of options, a complex interface, and all you need is to quickly size a system for a client.
Basic online calculators treat the entire building as a single rectangle. They give you an approximate kilowatt figure and nothing else. No information about radiators, no supply temperature variants, no client-ready report.
Installers end up stuck between a rock and a hard place: expensive, complicated programs or simplified calculators they can't rely on.
Installers end up stuck between a rock and a hard place: expensive, complicated programs or simplified calculators they can't rely on.
“Programs cost thousands of PLN and took weeks to learn. And I just need to quickly size a system for a client, not run a major project.”
that's what heating calculation software costs
Free during beta
to learn legacy heating software
HeatAlgo takes minutes to get your first result
heat loss calculations are mandatory
for Czyste Powietrze (Clean Air) grants (up to 170,000 PLN)
All heating calculations
in one place.
Open your browser, enter the data, get the result and a ready PDF for your client.
Preliminary heat pump sizing
Quick estimate for client conversations. Not a replacement for a full installation project.
Enter building and radiator data. You'll get a preliminary pump selection across 3 flow temperature variants, plus a room-by-room view of which radiators may need replacing. A PDF you hand to your client during the initial meeting.
OZC Calculator
Heat loss calculations based on simplified PN-EN 12831 methodology. Fast results, full transparency.
Room-by-room heat loss calculations. See every wall layer, every U-value, and the breakdown of transmission and ventilation losses. Everything is visible, nothing is hidden.
Learn more →Underfloor heating design
Upload a floor plan, draw zones, design the pipe layout with calculations.
Drop in a PDF or photo from the architect, calibrate the scale with two clicks, draw your zones. Draw the pipe layout on the plan and calculations update as you go: area, pipe length, and a warning when a loop exceeds 100 m.
Learn more →
Want to see how it works in practice?
Try for free
“Every formula in HeatAlgo is verified based on my experience. I help make sure the results match what I've seen on building sites for over 30 years.”
Jarek
Engineer with 33 years of experience, HeatAlgo co-creator
What installers say
“Client calls about a heat pump. I open HeatAlgo, enter the data, and in 15 minutes I have a PDF with pump selection and a list of radiators to replace. Used to take a whole day.”
“Finally I know exactly how much pipe to order before going to the site. Upload the floor plan, draw the zones, get exact metres. No more guessing.”
“Clients ask about energy calculations for the Clean Air grant. I used to send them to an engineer. Now I do it myself and it's an extra service I can offer.”
How it works
No training needed. No manual needed. Just a browser.
Open your browser
No installation, no downloads, no licence keys. Works on a laptop, tablet, or even from your car after a site visit.
Enter the building data
Simple forms with smart defaults. You can go deep (layer composition, non-homogeneous walls), but you don't have to.
Get a professional result
Pump comparison, OZC report, pipe layout. You see every step of the calculation. Generate a PDF and hand it to your client.
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Why we built this
Jarek is an expert with 33 years of experience, most of it gained in Norway. He was direct about it: existing heating design software costs thousands of PLN and takes weeks to learn. Even with his experience, he didn't want to waste time wrestling with a complicated program while a client was waiting for a quote.
The software was built for design engineers, not for the people who actually install heating systems.
So we built HeatAlgo. Tools an installer can open in a browser and start using immediately.
No courses. No manuals. No thousands of PLN in licences.