Everything you need to know about heat recovery ventilation systems

The Home ventilation system in modern homes these days is usually designed to be more energy efficient. This is because of the heat insulation technology. The technology aims to make buildings airtight so that they can hold heat for longer. This technology has solved some problems but it still has some drawbacks because we need ventilation for a healthy environment.

Heat recovery ventilation

Heat recovery ventilation systems (HRVs) consist of a pair of ventilation ducts that run next to each other. The ducts pass inside, between and outside of the house. One of the ducts carries fresh and cool air to the house and the other carries stale and moist air out of the house. The most interesting part is that the airstreams pass through a heat exchanger. A heat exchanger is a device that allows heat from the outgoing air to be passed to the incoming air and the most interesting part is that the outgoing and incoming air doesn’t mix.

Each duct has a fan that can be turned down or up automatically or manually depending on the humidity and temperature levels. The duct for incoming air has a bypass that allows cooler air to pass through it and cool the house without the air mixing with the outgoing air.

HRV system NZ in small homes consists of a single unit that is on one wall. It ventilates the entire house as the doors close and open between rooms. Larger buildings have ventilation grids installed in each room and the grids feed air into ducts. The ducts are connected between ceilings and floors of the building to an outside single ventilator.

Advantages of HRV

The first advantage is that HRVs are appealing. You get warm and well-ventilated air without using your power. They can help you save on your heating bills during winter and they reduce the need for air condition during summer. Excess moisture is kept out of your home. This makes it better for your furniture, your health and the building. They keep the temperatures, humidity and oxygen at a more constant level in your house creating a comfortable environment.

A lot of heat is normally lost through traditional ventilation. HRV helps to retain the heat and this saves on heating energy because you will not have the need to heat your home. The system reduces the amount of energy lost by 65 percent. You will only need a small amount of energy to power the fans in the system. These systems are effective and cheap to maintain. They are a perfect choice for people living in extremely cold or extremely hot environments.

The downside of the HRF home ventilation system is that it is expensive to install. Most benefits from these systems can only be seen during extreme climates when there is a huge difference in temperatures between the outdoor and the indoor. This means that they are most effective during winter and summer and the benefits are reduced during milder climates. However, they are still being improved on and in future they will be even more effective.


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