Prefinancing under “Clean Air” – how the advance payment works

In practice, everything comes down to procedures, documents and the right sequence of actions, not “system magic”.

How the advance payment works in practice

The mechanism referred to as “Clean Air” prefinancing is based on a simple premise: some of the funds reach the beneficiary or contractor before the investment is completed. In theory, this sounds like a convenience; in practice, it requires the contracts, work schedule and cost confirmations to be coordinated precisely.

Most often, it works like this: the investor submits an application and provides a cost estimate, and after its approval the advance payment is released. There is no room for arbitrariness here. If the documents are inconsistent, the payment is delayed. This is precisely the stage that can surprise people who assume that the funds will appear “automatically”.

There is another factor in the background: control over the scope of the investment. The “Clean Air” program does not finance everything, only specific measures related to improving a building’s energy efficiency. Therefore, every element must be justified technically and in terms of cost.

The heating system as the starting point for modernization

Defro Energy has observed for years that investors often begin modernization from the wrong end. First they choose a device, and only later think about the entire installation. This is a mistake that returns in the form of problems with settling the grant or underestimating costs.

Conversations with installers and designers repeatedly lead to one conclusion: the heating system must be planned as a whole. Boilers, heat pumps, the buffer tank and controls—all of it must work together. Experts from Defro Energy emphasize that only then is it possible to speak of genuine installation stability and predictable operating costs.

It is also worth remembering that in 2026 the “Clean Air” program continues to focus on replacing inefficient heat sources. This means that the decision to choose a heating device directly affects the amount of support available and the pace of the entire investment.

Conditions that determine the release of funds

The advance payment is not released with a single “click”. Funding institutions analyze several layers of documentation. The contract with the contractor, the work schedule and the technology’s compliance with the list of eligible devices—all of this must match down to the smallest detail.

In practice, the biggest delays result from formal errors. Seemingly minor issues: a missing signature, an outdated cost estimate or an incorrectly described scope of work. Then the investor waits for weeks. This is where something rarely discussed openly comes into play: the contractor’s role. A good contractor can guide an investment through the formalities faster than even the best adviser.

The “Clean Air” program also provides for phased settlements, which means that the funds do not always arrive in a single payment. This makes cash-flow planning necessary. Without it, even a well-designed modernization can come to a halt halfway through.

Where investors most often make mistakes

The biggest problem lies not in the system itself, but in expectations. Many investors assume that prefinancing resolves all financial issues. In fact, it only changes the timing of the money flow; it does not eliminate the obligation to document the funds.

The second common mistake is failing to match the technology to the building’s conditions. If the installation is poorly selected, cost adjustments arise, which directly affects the settlement. In such situations, even well-planned funding under the “Clean Air” program may be reduced.

Industry practice reveals one more, somewhat surprising point: investors often ignore the importance of an energy audit. Yet it is precisely the audit that organizes the entire project and helps avoid later adjustments.

Why documentation is more important than the technology itself

You may have the best boiler, modern controls and a properly selected buffer tank, but if the documentation does not match reality, the release of funds will come to a standstill. It sounds dry, but in practice it determines the pace of the entire investment.

Experts from Defro Energy point out that investors often focus on device specifications while overlooking the technical description in the documents. Yet that description is the basis for evaluation under the program. An official does not see the installation; they see the paperwork.

It is also worth mentioning another aspect: consistency between the data in the application and the invoices. Even minor discrepancies can lengthen the procedure. That is why some installation companies now take over the full formal service, in order to avoid such situations.

What prefinancing really changes for the investor

The biggest change concerns not the technology, but financial liquidity. Thanks to the advance payment, the investor does not have to tie up the entire amount at the start. This is particularly important for larger modernizations, where costs can reach tens of thousands of zlotys.

On the other hand, the system requires greater discipline. Each stage must be documented, and each expense assigned to a specific item in the cost estimate. This is where many investors first see how strongly the “Clean Air” program relies on formal precision rather than declarations.

In practice, a well-prepared investment proceeds smoothly, without nervous adjustments or delays. A poorly prepared one can come to a halt at the first payment stage. The difference can be greater than it initially seems. Grant money does not manage itself. The documentation and decisions made at the outset do the work.