Pricing
You pay for the report, not for time.
A HeatAlgo account is free forever: calculate heat loss, size a pump and draw underfloor heating without limit. You only pay when you need the full document to hand a client - one-off or on an unlimited subscription.
Plans
Compare the plans
Every plan covers the same four things - what changes is how many projects it covers.
Doing 6 reports a month or more - the subscription costs less than buying them one by one.
Prices are net. Tax depends on your country and is added at checkout.
How it works
From your first calculation to a finished report
Build and calculate for free
The AI client form, heat load calculations, underfloor heating and preliminary pump sizing - no card, no limit on the on-screen preview.
Buy a report when you need the document
€25 unlocks the whole project - every module together, a finished PDF with your branding and a report number. Revisions and further versions for 7 days from your first download.
Move to the subscription once you report more often
At around 6 reports a month, the subscription is cheaper than buying reports one by one.
Your projects stay forever
Whatever plan you're on, nothing disappears. Previews, calculations and history stay with you forever.
You only pay for the finished document handed to a client, never for access to your own data. A downloaded PDF is yours to keep, and for 7 days from your first download you can make corrections and generate further versions at no extra cost.
FAQ
Frequently asked questions about pricing
What can I do for free?
Calculate heat loss, size a pump and draw underfloor heating without limit. On screen you see the building totals plus one fully worked room and the recommended pump. Locked on preview: the remaining rooms, the details and calculation method, the pump variant comparison, the underfloor heating loop spacing and lengths, the printable underfloor floor plan, and adding another floor by hand. One report unlocks all of it at once.
What do I get when I buy a €25 report?
One unlock covers the whole project across every module - heat loss, pump sizing and underfloor heating together, with your branding and a report number. Unlocking individual modules is not a separate product.
How long can I download the report after buying it?
The clock starts on your first download, not at purchase - so you can buy ahead and work the project up a week later. From that first download you get 7 days of corrections and further PDF versions of the same project, at no extra cost. Downloaded files are yours to keep, and the project and its calculations stay visible in your account always. A report is bought for one job - the next house needs another report, or a subscription.
When does the subscription pay off instead of buying reports one by one?
At around 6 reports a month or more, the subscription is cheaper than buying reports one by one.
Who is the seller, and will I get an invoice?
A purchase made on this site is settled by Stripe, and Stripe is the seller: it works out the tax for your country and issues the invoice carrying our business name and the product details. Buying for a company? Enter your tax ID in the payment form and it appears on that invoice. The for-companies route stays open for negotiated engagements - there we are the seller and issue a VAT invoice ourselves, at the Polish 23% rate.
Which payment methods can I use?
On this site you pay by card, or through Apple Pay, Google Pay and Link. BLIK and Przelewy24 are not available on this route. Bank transfer is arranged through the for-companies route.
Can I buy from any country?
A purchase on this site cannot be completed from the countries our payment provider restricts: Ascension Island, China, Cuba, Iran, Kosovo, North Korea, Russia, Syria, Tristan da Cunha. From anywhere else it works normally.
I run a bigger company - where do I go?
See the for-companies page - that's where you'll book a call about rollout matched to your project volume.
Start for free, pay only for the report
Sign up without a card and see whether HeatAlgo fits your work - preview and calculations stay unlimited.