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Passive House ERV

What is passive house?

"Passive house" is also called "passive ultra-low energy building".

The word comes from German PASSIVHAUS. Since the first passive house was built in Darmstadt, Germany in 1991, more than 20 years’ practice has fully verified its high comfort and ultra-low energy consumption. The so-called "passive house" refers to the optimization of building envelope structure by adopting advanced energy-saving design concept and construction technology, which can greatly improve the thermal insulation, heat insulation and airtight performance of the building, and recycling heat (cold) in the indoor exhuast air by the energy recovery ventilation system, thereby significantly reducing the heating and cooling needs of the building. Besides, passive buildings also use natural ventilation, natural lighting, solar radiation and indoor non-heating heat sources to effectively achieve comfortable temperature, humidity, and daylight environments while minimizing or eliminating reliance on active mechanical heating or cooling systems.

passive house

What are the advantages of passive houses?

1. Economical and energy saving

Passive low-energy buildings use their own heat to meet indoor heating needs.

low-energy buildings

Passive House Technical Parameter Requirements

Passive house adopts high-performance external insulation, no thermal bridge design, good air-tight peripheral structure, etc. The application of technology can save 90% of the heating energy compared with conventional buildings under the same comfort level.

Passive House Technical Parameter

2. High efficiency energy recovery ventilator system

High efficiency energy recovery ventilator system is adopted, which is the core component of the passive house air treatment system and undertakes the indoor heating and cooling load.

Scientific air supply and exhaust integrated design, 24-hour continuous replacement of indoor fresh air, no sense of blowing, effective removal of peculiar smell, clean air, balance indoor air temperature, humidity and CO2 concentration, etc.

energy recovery ventilator system

Heat exchanger core in ERV

① The core flow channel is turbulent design, the air flow in the flow channel will be disturbed and takes away the fine dust in the air. And the surface of the nano film is very smooth, so there will be no thermal resistance due to dust accumulation. Besides, the membrane will vibrates due to the disturbance of air flow, which will improve the heat recovery efficiency significantly.

② Using high-tech nano paper (ER special paper), it is made of ABS and nano film injection molding. The thickness of the nano film is 25um, which is anti-corrosion, flame-retardant, moisture-resistant, high-temperature resistant, and pressure-resistant.

③ The nano membrane has small pores, the energy recovery efficiency is as high as 70%, and the air leakage rate is less than 10%.

④ Patented hexagonal design, double counter air flow, high energy recovery efficiency.

⑤ Air resistance of the core is small, air cross sectional is large, it is not easy to be blocked, and the service life is as long as more than 10 years.

⑥ Glue-free process, mortise and tenon design, uniform spacing, modular maintenance, easy maintenance.

Heat exchanger

3. High energy recovery efficiency

When replacing the air, keep the temperature and humidity of the indoor air and transfer it to the new introduced air, energy recovery efficiency is ≥75%. Maintain the indoor temperature and humidity within a certain range, and reduce the energy consumption of the air conditioner.

High energy recovery efficiency

Environmentally friendly EPP\PE\PVC pipes are used, which are light, easy to install and sound insulated.

The fresh air unit, the fresh air inlets and outlets are equipped with noise reduction devices. Fan and pipe are connected by soft pipe to ensure the indoor silence.

noise reduction

4. Constant temperature and humidity

constant temperature

Using technologies such as heat-insulating enclosure structure and fresh air ventilation system with high-efficiency heat recovery, the temperature can be controlled at an appropriate temperature without air conditioning and heating equipments, creating a healthy and comfortable environment for the human body.

Constant humidity

According to indoor air standards in China, the indoor humidity in winter and summer should be 30%-80%. Through the energy recovery ventilator, the indoor humidity can be controlled at an appropriate humidity, which can effectively prevent respiratory diseases caused by dryness and indoor mold growth.

heat insulation

5. Constant oxygen and haze removal

The ERV system is equipped with G4+H11 filter. The purification efficiency is >95%, which can effectively filter dust, pollen and PM2.5 in the air. While replacing the air to maintain sufficient oxygen in the room, it also purifies the harmful substances in the indoor air. After people live in passive houses, the number of colds is greatly reduced, and the symptoms of heart disease are greatly relieved.


HEPA filters

6. Environmental protection and low noise

Passive house adopts environmental protection and sound insulation materials, and integrates various materials such as three-layer insulating glass, external wall insulation and sound insulation system, high-performance door and window, silent DC motor energy recovery ventilation system, and thickened floor. Construct multiple sound insulation and noise reduction systems to enjoy a quiet and comfortable life.

insulated wall

ERV system noise reduction design

centrifugal fan

Fourth generation centrifugal fan

The high-performance and low-noise centrifugal fan is used to reduce the turbulent flow around the wind wheel. Even with the high-speed motor, it can run at balance, so that the wind speed is uniform, air volume is sufficient.

noise reduction motor

Brand DC inverter motor

Energy saving: no hysteresis loss, zero slip. saves more than 30% energy than ordinary motors at high speed .

Low noise: no electromagnetic sound, 2-5db(A) less noise than ordinary motors, the lowest noise is 28db(A).

Adjustable air volume: motor can speed up by adjusting the dial switch or potentiometer on the host computer board to achieve the required air volume and air pressure.

7. Keep indoor environment clean

There is no floating dust. Make it easier to clean room. Reduce the workload of housework and the use of dust removal tools.

8. Remove indoor odor

Smokers don't have to worry about the air quality, the smell of smoke will be discharged outside after a while, and family members don't have to worry about second-hand smoke. It is no problem to eat hot pot, and there is no more difficult to get rid of the smell.

9. Intelligent Internet Control

Get access to smart communities, with the help of cloud functions. Real-time monitor of home environment, enjoy smart life.

How does passive house ERV come from?

In modern times, people are improving their living standards not only by installing air conditioning and floor heating, but also by incorporating devices like ventilators and dehumidifiers. Those who are environmentally conscious are taking it a step further by using solar energy products such as solar water heaters and solar power generation systems. As a result, balconies are now filled with pipes and equipment.

Furthermore, there is a growing demand for efficient mechanical equipment, especially heat recovery ventilation systems, due to the increasing interest in high-performance design and construction. Particularly in certified Passive House projects, where HRVs (or ERVs) with an efficiency efficiency of over 75% are required by the Passive House Institute.

What is passive house ERV used for?

The heat recovery ventilation system is a crucial part in Passive House Buildings, acting as the building's "lung" by providing continuous fresh, filtered air while removing stale air. It also balances the temperature and humidity of the air without losing heat.

What’s the passive house ERV advantages?

Dpurat has done extensive research, development, and testing to create a multi-functional machine that can maintain a comfortable temperature and humidity level. This machine has both heating and cooling systems, which makes it highly efficient and energy-saving to address heating and cooling issues all at once.

What does passive house ERV composed of?

This ERV heat pump has a split design, with separate indoor and outdoor units. It utilizes full heat recovery technology, an air source heat pump, and carbon dioxide air quality detection technology.

indoor outdoor units

Contact Dpurat

Contact Dpurat

Malu Chen

  Skype:maluchen123

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