Mechanical Ventilation with Heat Recovery (MVHR): What It Is and Why It Matters π¬οΈ
Mechanical Ventilation with Heat Recovery, also known as MVHR, is a technology increasingly used in new buildings and energy-efficient renovations. In modern construction, where thermal insulation is a priority, MVHR solves a commonly overlooked issue: indoor air quality.
This system ensures constant, controlled, and highly efficient air exchange, improving living comfort and preventing problems such as humidity, mold, and stale air. For more on energy efficiency, check out our Recommended Products section.
1. What Is Mechanical Ventilation with Heat Recovery (MVHR)? β
MVHR is a system that automatically and continuously replaces indoor air without opening windows. It helps improve air quality by controlling COβ, humidity, fine dust, and VOCs (volatile organic compounds).
2. How Does an MVHR System Work? βοΈ
An MVHR system creates two separate air flows: one for extraction and one for supply.
- Ventilation unit: the heart of the system
- Filters: trap impurities
- Ducts: distribute the air
- Heat exchanger: found in double-flow systems
3. Types of MVHR for Controlled Ventilation π§°
- Single-flow: economical, but no heat recovery
- Double-flow: recovers up to 90% of heat
- Decentralized: for single rooms, ideal in renovations
4. Advantages of Mechanical Ventilation with Heat Recovery β
- Superior air quality
- Eliminates mold and condensation
- Energy efficiency with heat recovery
- Thermal comfort without open windows
- Health and well-being
- Building preservation
5. When Is It Worth Installing an MVHR System? π‘
- New or well-insulated buildings
- If youβre aiming for energy class A or higher
- If you have mold or humidity problems
- Your goal: clean air and savings
6. When MVHR Is Not Necessary π«
- Natural ventilation is already effective
- Technical or financial limitations
7. MVHR Maintenance π§
| Service | Frequency |
|---|---|
| Filter replacement | Every 3β6 months |
| Duct cleaning | Every 3β5 years |
| Fan and heat exchanger check | Every 1β2 years |
8. MVHR vs. Natural Ventilation βοΈ
| Feature | MVHR | Natural ventilation |
|---|---|---|
| Air exchange | Constant and controlled | Irregular |
| Filtration | Yes | No |
| Heat recovery | Yes | No |
| Thermal comfort | High | Variable |
| Indoor pollutants | Filtered | Present |
| Humidity | Regulated | Often high |
9. Frequently Asked Questions About MVHR β
- Does it work in winter? Yes, it recovers heat and prevents losses.
- Do I need to open the windows? No, frequent opening is not recommended.
- Is it noisy? No, if well designed (20β40 dB).
- Is it mandatory? Not always, but recommended in highly efficient buildings.
- How much does it cost? From β¬2,500 to over β¬10,000, depending on the type.
10. Conclusion π§
MVHR is a smart choice for home comfort, health, and energy efficiency. A well-designed Mechanical Ventilation with Heat Recovery system can dramatically improve air quality and reduce energy costs. A sustainable investment for a healthier, more comfortable future!
