Recommended series/models: Komfort Ultra series, Komfort series
 
Founded in 1900, Bole Ventilation Group is a well-known supplier of ventilation equipment in Europe and one of the largest manufacturers of household ventilation products in the world, with more than 700 patented technologies in a century, and has been widely praised in the ventilation industry.
 
Bole Group currently has five sub-brands, respectively producing fresh air systems, heat exchangers, electric motors, commercial air conditioning and ventilation equipment, as well as agricultural planting tents and ventilation equipment, the production experience is quite rich, and the technical accumulation also has certain advantages, in terms of central fresh air system, Bole currently mainly promotes the Komfort Ultra and Komfort series.
 
The price of Komfort Ultra series is relatively close to the people, about 20,000 yuan, equipped with its own EC motor, noise control is appropriate, and it also has a high static pressure of 300Pa, even if multiple pipes are extended, it can ensure that the air volume of the end air outlet is sufficient, but the filtration system is relatively general, only using G4-H11 double-layer filtration scheme, which is inferior to many mainstream brands, and is not equipped with an independent filter and purification box, and the replacement cycle of the filter screen is relatively short.
 
The Komfort mainly promotes the high-end market, the price is between 40,000-70,000 yuan, the fresh air volume can reach 700m³/h, the biggest highlight of Komfort is that it has the top static pressure performance in the industry, up to 1000Pa, the ultra-high static pressure design can easily cope with the wind pressure of multiple diversion pipes, and a fresh air system can meet the ventilation needs of the three-story villa.
 
The heat recovered in the full heat exchanger cannot heat the incoming air to the preset temperature, and most of the fresh air hosts of Bole are equipped with electric heating modules, which will automatically turn on when the outdoor air is too cold to help maintain the indoor temperature, and the electric auxiliary heat module can also play a defrosting function, of course, the main reason for the electric auxiliary heat exchanger is that the performance of the full heat exchanger of Bole is relatively average in terms of thermal efficiency, and the enthalpy exchange rate ranges between 27-45%, which still has a lot of room for improvement compared with first-line competing products.
 
It should be noted that whether it is Komfort Ultra or Komfort series, it has sensible heat exchange products, sensible heat exchange core intelligently exchange temperature and heat, can not exchange humidity conversion energy in the air, it is recommended that users in the central and northern regions try to buy full heat exchanger type, all models of Bole are distinguished by the letters of the suffix, E stands for "ERV", that is, the abbreviation of full heat exchanger, and H stands for "HRV", which belongs to sensible heat exchange products.
 
At present, Bole is one of the few manufacturers that have opened flagship stores on domestic e-commerce platforms, which is convenient for consumers to contact and communicate online, and the fresh air system involves the joint cooperation of multiple links.