Features of Ductless HRVs
- With ductless design, it provides convenient and flexible installation.
- Equipped with efficient heat recovery technology, ductless HRVs can efficiently reduce unnecessary energy consumption.
- Supports intelligent control and on-demand adjustment.
- Adopting high-performance air filtration, it effectively purifies indoor air and enhances comfort in residential and office environments.
- It holds multiple international certifications, such asCE, SAA, and TUV.
- Offersdirect factory supply and supports OEM/ODM customization.
Professional Ductless HRV Manufacturer in China
Our ductless HRV systems are designed with energy-saving motors and optimized airflow structures to ensure stable performance with low consumption. Each ductless HRV unit is designed for long service life and minimal maintenance, helping to reduce long-term operating costs for households and projects.
Aosun is a professional manufacturer in high-efficiency ductless HRV and decentralized ventilation systems. With advanced production facilities and strict quality control, we focus on designing and producing reliable, energy-saving ventilation products for global residential, commercial and construction projects. Committed to product innovation and customer satisfaction, we provide professional solutions and reliable support for importers, distributors and project clients worldwide.
This glass panel single room HRV delivers both stylish appearance and efficient ventilation performance.
Compact round ductless HRV with smart control can provide easy airflow adjustment and low energy consumption.
Advanced intelligent ductless HRVs provide constant fresh air quality and recovers heat.
Sleek grey ductless HRV unit with ultra-quiet operation, ideal for bedrooms, hotels and apartments.
High-performance centralized HRV with balanced ventilation, designed for large residential and commercial spaces.
Slim through-wall HRV with efficient heat recovery, offering efficient ventilation without complex ductwork.
What is a Ductless HRV?
A ductless HRV is a decentralized ventilation system that achieves air exchange and heat recovery without requiring any duct installation. It brings fresh outdoor air while removing contaminated air indoors and recovering the heat of exhaust air. You can use it to reduce energy consumption for air conditioning and heating. The ductless heat recovery ventilator is ideal for spaces where ductwork cannot be installed.
Unlike traditional duct ventilation systems, ductless HRV systems are flexible to install and convenient to construct, suitable for residential buildings, apartments, offices and retrofit projects. It can efficiently maintain indoor air freshness and achieve more efficient and cost-effective ventilation operation.
How Does a Ductless HRV Works?
A ductless HRV’s operation principle is air exchange and heat recovery. The ductless heat recovery ventilator can remove stale air and bring in fresh air at the same time. In addition, it transfers heat by its heat recovery core in interior. When the indoor stale air is expelled, its heat will be recovered by the heat recovery core and transferred to the incoming fresh air. In winter or summer, the ductless heat recovery ventilation can maintain indoor temperature stability through heat exchange. Therefore, it can reduce the load and energy consumption of indoor air conditioning or heating systems in consistent ventilation, achieving energy savings and effective air exchange.
Applications of Ductless HRVs
Ductless heat recovery ventilators are suitable for building environments with consistent fresh air requirements, especially spaces where traditional duct systems cannot be installed. They are widely used as single room ventilation systems for commercial and renovation projects such as hotel rooms and old house retrofits.
Residential Homes
In traditional residential spaces, keeping windows closed for a long time with poor ventilation may generate odors and dampness. But opening windows for ventilation loses a large amount of hot or cold air, increasing energy consumption. With a ductless HRV, you can get consistent fresh air in windows-closed conditions. Meanwhile, it can also recover exhaust heat and reduce energy loss.
Residential Renovation & Retrofit Projects
Old houses often lack pre-installed central air ductwork. It is difficult to install new ducts or install traditional central fresh air systems. There are also some existing issues like poor ventilation and dampness. In these projects, we recommend selecting a ductless HRV with easy installation. It can quickly achieve overall ventilation and energy savings. It is the ideal ventilation solution for old house renovation.
Hotels & Homestays Rooms
Hotels and homestays often suffer from poor ventilation and odors and affect accommodation experience. Centralization HRVs with high energy consumption are difficult to control a single room. Therefore, we recommend using a ductless HRV to achieve a single room ventilation. It can maintain low-noise operation and reduce the overall energy consumption through heat recovery. In addition, it efficiently improves guests experience.
Small Commercial Spaces
Commercial spaces such as offices and stores have high population density and insufficient ventilation. The long-term sealed environments may impact customers’ experience and staff health. You can choose a ductless HRV to consistently exchange stale indoor air and fresh outdoor air. At the same time, it can also save energy and reduce operating costs. The ductless HRV creates a healthy and comfortable commercial environment for your projects.
Apartments & Multi-Unit Buildings
With cramped spaces, installing traditional ventilation devices in apartments may occupy ceiling space. Poor ventilation can lead to stale air and odors. The ductless HRV can achieve high-efficiency and low-noise ventilation with its compact design and flexible installation. You can choose one to ventilate and recover heat. It also perfectly adapts apartment environment.
In summary, ductless heat recovery ventilators can efficiently solve some core problems, such as insufficient ventilation, excess energy consumption, and difficulty in duct laying. They are suitable for apartments, retrofit buildings and hotel rooms, providing a flexible ventilation solution for buildings that cannot install traditional duct systems.
Installation Instructions of Ductless HRVs
Ductless heat recovery ventilators are usually installed on walls or ceilings. Thanks to their duct-free design, you can install them conveniently and easily. They are suitable for wall-mounted or ceiling-mounted applications in residential, commercial and renovation projects.
Choose the right installation location
Firstly, you need to determine the ductless HRV’s installation location. We recommend ensuring there is sufficient maintenance space (at least 10-15cm around the unit) around the equipment before installing. In addition, the air inlets and outlets must not be obstructed to ensure flow of fresh air and exhaust air.
Drilling and Fixation
After determining the installation location, you should drill openings based on the size of ductless heat recovery ventilator. The holes should be straight and smooth to avoid damaging the wall or ceiling. Then, fix the unit’s installation plate of the equipment and ensure the unit is stable and level. Any tilt may cause abnormal noise during operation.
Air Inlet and Outlet Connection
Connect the air inlet and outlet channels to the corresponding device interfaces respectively. In this step, you should pay attention to the sealing of the interfaces to ensure they are airtight. Excellent sealing performance can efficiently prevent air leakage from compromising heat recovery efficiency.
Electrical wiring and safety
Before wiring, turn off the power supply to avoid electric shock. Electrical wiring should be completed according to the unit’s marking and local voltage regulations. We suggest that the electrical wiring be performed by professional electricians to ensure compliance with the safety regulations of the target market.
Operation and Testing
Connect the power, test whether the airflow rate, mode switching, and intelligent control functions are working properly. Check the overall airtightness. If abnormal noise, vibration or function failure is detected, turn off the power immediately and check the installation connections. If the device is operating normally without abnormal noise detected,you can use it.
Installation Tips：
- Before installing, you need to confirm that the power supply specifications are consistent with your equipment requirements.
- Ensure that exhaust and fresh air channels are not interconnected to avoid affecting heat recovery and ventilation performance of the ductless HRV.
- We recommend that you regularly check the seal between the filter and the interface to ensure long-term stable operation of the equipment.
Correct installation of the ductless HRV helps maintain better ventilation performance. Both through-wall and ceiling-mounted installations of the Ductless HRV are simple. You can choose appropriate installation methods based on your project installation needs. If you have any questions regarding project installation plans, size customization, or related matters, you can contact us for professional technical guide solutions.
The heat recovery efficiency of ductless HRV units normally ranges from 60% to 90%. The heat recovery efficiency depends on the structure and design of the heat exchange core. Higher efficiency greatly reduces heating energy loss in winter. It is an excellent solution for cold climate ventilation and energy-saving ventilation systems.
Yes, ductless HRVs are particularly suitable for cold climates regions. In fact, they are specifically designed to maintain efficient ventilation while minimizing heat loss in low-temperature environments. By efficiently recovering of exhaust heat, these systems greatly reduce energy waste and keep indoor temperatures stable. They are widely applied in passive house ventilation projects.
Yes, ductless HRVs effectively lower excess indoor humidity and improve air circulation. They directly help prevent mold, mildew and condensation. By continuously removing damp stale air and supplying fresh dry air, they control humidity at a healthy level. They are widely used in bathroom, basement and apartment ventilation to keep spaces dry, clean and free from mold-related problems.
The number of ductless HRVs required mainly depends on the room size and the airflow capacity of the unit. Generally speaking, one ductless HRV is typically sufficient for a standard bedroom. Larger spaces such as living rooms may require two units to ensure adequate air exchange and balanced ventilation throughout the area.
It is generally recommended to run the ductless HRV continuously at low speed to maintain stable and healthy indoor air quality. Modern ductless HRV units are designed for energy-efficient and long-term operation. They also support intelligent functions such as timers and humidity sensors.You can adjustment of operation mode for better comfort and energy savings.
Yes, ductless HRVs will affect indoor temperature. However, they will not cause sudden temperature sharp drops like opening windows. The built-in heat exchanger recovers heat from exhaust air and transfers it to incoming fresh air. It helps maintain a stable and comfortable indoor temperature. At the same time, the ductless HRV ensures continuous fresh air supply without sacrificing thermal comfort, providing highly energy efficient ventilation for homes, offices and commercial spaces year-round.
Modern ductless HRVs are designed with quiet operation in mind and produce very low noise levels. They use optimized motors and airflow structures to keep sound low during regular use, so they won’t disturb daily rest or sleep. This makes them ideal for installation in bedrooms, hotel rooms and other quiet spaces where low noise is essential.
Whether the filter of a ductless HRV needs to be replaced depends on the specific model. Some models are equipped with washable and reusable filters. They only need to regularly clean every month. However, the dust and other environmental contaminants require more frequent cleaning. Other models use disposable filters that require periodic replacement. These models need to replace filters every 3-6 months. The exact time of replacement depends on the usage environment.
Yes, a ductless HRV can partially replace an exhaust fan, and it is more functional and efficient. Unlike traditional exhaust fans that only remove stale indoor, ductless HRVs can simultaneously achieve exhaust polluted air and supply fresh outdoor air. In addition, it also can recover heat form exhaust air. It is particularly suitable for bathroom, bedroom and other closed or small spaces, meeting both ventilation and air quality improvement needs.
