Total heat exchange fresh fan


360 degree ventilation

Circulation of oxygen and ventilation, no need to open windows to enjoy fresh air

Multiple filtering

High density filter + G4 filter + fresh air filter have stronger antibacterial effect

Total heat recovery

The energy recovery rate of high efficiency filter element is as high as 70%, avoiding large energy loss and energy saving

Super Silent

CDF air duct design + DC motor, larger air volume, lower noise

Oxygen enriched fresh air

Introduce fresh air in 24 hours, and replace indoor dirty air to make indoor air more fresh

Total heat exchange fresh fan参数

Product model QXD-155/UQ2 QXD-220/UQ2  QXD-270/YQ3  QXD-370/YQ3  QXD-550/YQ3 QXD-850/YQ3
Heat recovery rate(%) Summer time High / medium / low  65/-/71 63/-/69 70/75/78 68/72/77 68/72/78 68/72/75
Winter time High / medium / low  69/-/78 67/-/77 73/77/79 71/75/78 70/73/77 69/71/75
noise(dB(A) High / medium / low  35/-/29 36/-/30 33/31/28 34/31/28 35/32/30 37/34/31
power(W) High / medium / low  60/-/50 70/-/60 110/100/85 150/120/105 220/185/160 370/340/300
Air volume(m3/h) 155 220 270 370 550 850
static pressure(Pa) 70 90 100 150
Power Supply 220V/50Hz
Waterproof grade IPX4
Tuyere diameter(mm) 96 145 145 145 200 250
weight(Kg) 16.5 17 28 32 41 65
Product size (length * width * height mm) 775*510*240 775*510*240 1080*785*270 1080*925*270 1130*1105*310 1490*995*395

1. The company reserves the right to change the parameters and appearance. The products are updated continuously. Please refer to the actual products and product nameplates. Any change is subject to no notice;

2. Executive Standards of the equipment: GB / t21087-2007, gb4706.1-2008, gb4706.32-2012;

3. Q stands for total heat exchange, x stands for fresh air change, D stands for ceiling type, number stands for air volume, DC stands for DC (AC omitted), u or Y stands for series, Q2 stands for two speed wind, Q3 stands for three speed wind.


1. Please contact the manufacturer or professional personnel to replace and clean the filter screen according to the unit cleaning tips;
2. In case of any unit failure, please contact the manufacturer or the sales and installation unit, and do not repair by yourself;
3. In case of water leakage, please disconnect the power supply of the machine and contact the manufacturer or the sales and installation sheet for maintenance;
4. Parameters, dimensions and other changes caused by product upgrading of the company shall be subject to the actual product and product nameplate, and will not be notified in case of any change.

Matters needing attention

1. Please arrange special power line for the machine to supply power;
2. When the machine is stopped for a long time, please unplug the power supply;
3. Please construct in strict accordance with the requirements of construction standards to ensure smooth drainage;
4. It is forbidden to wash the machine directly with water or wipe the machine with wet cloth when it is electrified;
5. It is forbidden to install the machine in the space of heat source, inflammable and explosive, acid and alkali, salt, paint and glue.


1. Failing to provide invoices, receipts or shopping vouchers;
2. Machine damage caused by natural disasters or human factors;
3. Damage caused by exceeding the scope of use or installing or dismantling the machine without permission;
4. Machine damage caused by abnormal supply voltage or wrong wiring;
5. All rights of interpretation belong to Ningbo tengkong New Energy Technology Co., Ltd;
6. The machine is damaged due to improper installation or use in accordance with the instructions.

service commitment

Product Three Guarantees: the whole machine is guaranteed for three years, and the lifetime maintenance warranty period is calculated from the date of invoice After sales service: 24-hour response in Jiangsu, Zhejiang and Shanghai, 48 hours arrival in other areas (except Xinjiang, Tibet, Qinghai, Inner Mongolia) 24 hours response and telephone guidance, 72 hours in place Price system: all parts and components, value-added services, unified national price