We have been active in the European market since 2007 and currently collaborate with OEM partners and distributors in several countries, including Spain, Poland, Russia, Sweden, the UK, and more. If you're interested in potential cooperation—whether for the residential, commercial, or industrial sector—we would be happy to learn more about your market focus and recommend suitable products for your needs.

We position ourselves as a dedicated manufacturer rather than a brand promoter. Our focus is on providing OEM and ODM manufacturing services for global customers, which means our products are often available under different brand names in various markets. While we rarely promote our own brands (such as Holtop or Airwoods), we do supply them for select building projects through appointed contractors. If you're interested in becoming a distributor or exploring collaboration opportunities, feel free to contact us.

We calculate the required air volume based on room size and air exchange rate (ACH) using this formula:

Air Volume (m³/h) = Room Area (m²) × Ceiling Height (m) × Air Changes per Hour (ACH)

Example:
Room Area: 140 m²
Ceiling Height: 3 m
ACH (Air Changes per Hour): 1

Calculation:
140 × 3 × 1 = 420 m³/h

Tip:
1 ACH is standard for general ventilation.
For cleanrooms or medical spaces, a higher ACH is often required to meet stricter air quality standards.

You can purchase replacement filters through a local HVAC contractor or directly from our sales representative. If you're unsure which filter model you need, feel free to contact us with your unit's model number—we’ll be happy to assist you.

Our residential ERVs are internally insulated and designed for flexible indoor installation. They can be placed in various areas of the home, such as:

Single room
Closets
Basements
Unconditioned crawl spaces
Attics

However, they must not be installed in locations exposed to outdoor elements, such as open balconies or exterior walls without proper protection. For best performance and durability, always ensure the unit is installed in a dry, protected indoor environment.

CE, UKCA, ROHS, REACH, CSA,etc.