What is the nZEB standard and what advantages does it bring for the tenant?

When you're looking for a new home, you want a space that makes life easy, with predictable expenses and consistent comfort. That's where the standard comes in. „"nZEB"” (nearly zero energy building, building with almost zero energy consumption) and energy efficiency.

In 2025 we are already talking about a mature standard, with clear rules and an even more ambitious European horizon – the transition to zero-emission buildings in the coming years. Let's find out together what this certification is, how to obtain it, and how it positively influences your every day.

What does nZEB mean to you?

An nZEB residential project like Welmont – Developed by ROKMAN it is designed intelligently and with vision from the start. That is:

• consume very little energy;
• to produce some of the energy from renewable sources (at least 30% of primary energy).

Basically, you enjoy:

• stable temperature in winter and summer, without annoying variations;
• predictable invoices;
• a future-proof home with better resale value.

Energy efficiency of the home will make your every day comfortable, and you will always be in the center.

What technologies work for you?

In an nZEB building, smart design combines with modern technologies, so you can enjoy:

• Superior insulation + high-performance windows.
• Efficient heat pumps/boilers: heating and cooling with low consumption.
• Ventilation with heat recovery: fresh air, minimal energy loss.
• Photovoltaic / solar panels: some of the energy comes directly from the sun.
• Efficient lighting and equipment: LED, sensors, optimal consumption in common spaces.

In the ROKMAN philosophy, comfort and efficiency in new blocks of flats Brașov are the result of a coherent methodology: integrated design, real energy verification, execution with attention to detail and correct sizing of installations.

How to quickly recognize a genuine nZEB apartment

The 60-second test

• Ask nZEB compliance report (who made it, date, what solutions it includes).
• Check energy performance certificate (EPC): have a unique MDLPA code, indicate low primary energy consumption and at least 30% energy from renewable sources.
• Ask if the project is ongoing Methodology Mc 001-2022.
  

Documents that make a difference

• nZEB compliance report: confirms the building's inclusion in the nZEB levels. See here a example.
• Valid CPE at reception: contains the energy class, primary energy consumption, percentage of renewables and CO₂ emissions. See here a example.
• Equipment data sheets/warranties: heat pumps, heat recovery units, photovoltaic/solar panels, individual metering system.
  

Myths vs. reality

Myth: „nZEB means complicated technology.” 

Reality: the systems are designed to work for you, not against you — automated, with intuitive settings, easy maintenance (such as periodic filter changes), and clear guides received upon delivery, so you can enjoy hassle-free comfort.

 

Myth: „Only the panels make a difference.” 

Reality: performance comes from the whole — careful design, continuous insulation, high-performance windows, tightness, ventilation with recovery and efficient equipment. The panels complete the puzzle, they do not solve it alone.

 

Myth: „In nZEB it is colder in winter and too hot in summer.” 

Reality: the thermal envelope and ventilation with recovery stabilize the temperature throughout the year, so that differences between rooms decrease, drafts disappear, and comfort remains constant, with reduced consumption.

 

Myth: „nZEBs cost a lot and don’t pay for themselves.” 

Reality: the initial investment is balanced over time through more predictable heating, cooling and hot water bills, plus added daily comfort and a better resale value for the apartment.

 

Myth: „You can’t naturally ventilate in a nZEB.” 

Reality: you can open the windows at any time; the difference is that you also have controlled ventilation that provides fresh air with minimal energy loss when the windows are closed, ideal for the night or very cold/hot days.

 

Myth: „Maintenance is expensive and complicated.” 

Reality: maintenance is simple, focused on periodic operations (e.g. filter replacement), with transparent intervals and costs, communicated upon handover — no surprises.

 

Myth: „nZEB is only for houses, not apartments.” 

Reality: the standard applies to all new buildings, and nZEB blocks deliver the same benefits: stable thermal comfort, clean air, lower bills and a modern living experience.

 

Myth: „The energy certificate is just a piece of paper.” 

Reality: official documents (nZEB compliance report and energy performance certificate with unique code) put energy consumption, renewable energy share and emissions into figures, useful for purchase, insurance and resale.

 

Myth: „nZEB forces you into a smart home and complicated apps.” 

Reality: automations are optional; you can use the apartment exactly like a classic one, and if you want phone control for temperature or light, you add it later, without constraints.

 

Myth: „An nZEB block looks the same as a regular one, so the difference is zero.” 

Reality: the difference is felt beyond the facade — quietness inside, uniform temperature, fresh air without drafts, well-distributed light in common spaces, and optimized expenses every month.

 

Frequently asked questions

How to obtain nZEB certification?

• In design: an energy auditor (grade I) prepares nZEB compliance report. The document shows that the project complies with nZEB levels and is submitted with the urban planning certificate / building permit. If the solutions are feasible (insulation, ventilation with recovery, heat pumps, panels, etc.), they are included in the project.
• At reception: issued energy performance certificate (EPC), registered with a unique MDLPA code. The CPE confirms, through indicators, that the completed building falls within the nZEB parameters of the methodology. A CPE without a unique code is null and void.

 

What does nZEB certification measure and how is it done?

It is calculated according to Methodology Mc 001-2022 and includes: total consumption of primary energy (heating, cooling, ventilation, hot water, lighting), share of energy from renewable sources and CO₂ emissions. All are determined by a standardized calculation.

 

Is there a clear criterion to differentiate nZEB from non-nZEB?

Yes. A building is nZEB if:

• respect maximum levels primary energy established by Mc 001-2022;
• ensure at least 30% from primary energy from renewable sources (on site or nearby – up to ~30 km, according to MDLPA guidelines);
• this is explicitly stated in the nZEB compliance report and then in the CPE. If these thresholds/conditions are not met, we are talking about non-nZEB. 

ROKMAN philosophy: efficiency, comfort and long-term value

ROKMAN sees nZEB as a design and construction philosophy. This means:

• Architecture and installations thought together, from day one.
• High-performance materials and responsible assembly.
• Efficient systems at low temperatures, with heat recovery and energy management.
• Transparency in communicating energy indicators and implemented solutions.
• Education for tenants: correct use, maintenance, optimal settings.
  

Want to see what this philosophy looks like in real life? Explore 2-room apartments or 3-room apartments ROKMAN WELMONT – solutions designed for today's pace of life, with modern energy standards and details oriented towards daily comfort.

ROKMAN relies on a SUPERIOR standard of living, with smart efficiency and people-oriented design. And this is reflected in every decision: from the orientation of the building, to the thickness of the insulation and to the fine tuning of the technical systems. If you want a house in which feel good every day, nZEB is the right way to go – and a developer who treats nZEB as philosophy is the partner you need.