The “Boost” increased ventilation mode is used to remove excess moisture and odors from bathroom and toilet areas. For convenient use of the heat recovery unit, we recommend running any four-core cable from the unit location to the bathroom light switch(es), so that the “Boost” function can be activated by the light switch or, ideally, by a separate button.

In winter, when it is cold, the heat recovery unit’s electric heater operates to protect the heat exchanger from freezing, so it cannot be switched off.

Increased electricity consumption may also be affected by clogged filters and an unbalanced ventilation system.

To reduce electricity consumption, we recommend:

• replacing the filters;
• balancing the ventilation system, if this has not been done;

• reducing the speed of the heat recovery unit.

On a hot day, opening the windows will not cool your home down – it will only let in even more hot air. In winter, a heat recovery unit helps retain warmth, while in summer it helps retain coolness. That is why we also do not recommend switching off the heat recovery ventilation system completely during summer – let it run continuously at low power. When possible, the heat exchanger will cool the incoming fresh outdoor air by at least a few degrees. When the outdoor temperature drops, the ventilation unit automatically switches to “bypass” mode, so that cooler air is supplied directly, bypassing the heat exchanger. The unit will take care of your comfort both day and night by operating in different modes. On very hot days, however, only an air conditioner can ensure effective cooling.

Switch the ventilation unit off and then on again using the electrical panel. If restarting does not help, please email help@oxygen.lt and include your name, surname, phone number, and exact address.

It is likely that a fault has occurred in the ventilation unit. In order to help you, we will need some additional information:

• Switch the ventilation unit off and on again using its circuit breaker (fuse) in the electrical panel. Sometimes a simple restart helps.
• Count how many times the red light flashes.
• Open the top cover and take a photo of the ventilation unit. It is important that the technicians have enough space to carry out the service when they arrive.
• Write down the unit’s serial number. You will find it on the product label.
• Send this information to us by email at servisas@oxygen.lt. Please include your name, surname, phone number, and exact address. Once we receive your email, we will contact you shortly.

After replacing the ventilation unit filters with new ones, the filter service timer must be reset. Using a thin screwdriver (or a matchstick or toothpick), gently press the hidden S1 button once through the small hole on the side of the control panel. When the yellow filter replacement indicator light turns on, press the S1 button again and hold it for about 3 seconds until the light goes out. The ventilation unit will continue operating, and the filter service timer will be reset to its initial state. Read more in the installation and operation manual.
 
IMPORTANT! Restarting the ventilation unit or disconnecting it from the power supply does not reset the filter service timer.

You can control your ventilation unit more easily by purchasing the OXYGEN smart Wi-Fi controller or LCD control panel.

Return your old knob controller and receive a €50 discount! Use the discount code “Control Panel Replacement”.

If the yellow light is flashing evenly and continuously, regardless of the green light, it is time to check and, if necessary, replace the heat recovery unit’s air filters.

If the yellow light is flashing alternately with the green light, the frost protection function is operating. There is nothing you need to do – your smart OXYGEN heat recovery unit is taking care of the air in your home.

In airtight A, A+, and A++ homes, a recirculating cooker hood should be installed. Its purpose is to collect moisture and grease. Unwanted odors generated during cooking will be removed by the heat recovery unit through the extract air vents provided in the kitchen area. “Carbon” filters may be used, but they are not necessary.
 
Almost any cooker hood becomes recirculating if it is not connected to an extract air duct. The most modern extraction solutions direct the cleaned airflow below or above the kitchen cabinets. From there, the heat recovery unit will collect it together with the remaining odors.

Ventilation system designers do not recommend, and professional installers never connect, a cooker hood branch to heat recovery ventilation ducts or to the unit itself. This is harmful because:

• When using a cooker hood with a fan, the ventilation system becomes unbalanced and may even freeze during cold winter weather. While such a hood is operating, some kitchen odors may also enter the living spaces through the ventilation system.
• When using a canopy-type hood, its capacity is not sufficient to collect steam effectively. When this type of hood is activated, air extraction from the remaining rooms is reduced.
• Proper installation of such a system requires expensive additional components, such as pressure relays and motorized dampers. A poorly installed system will not ensure effective ventilation of the premises.
• We recommend choosing a recirculating cooker hood and also installing a pressure relay sensor, then running any four-core cable from it to the heat recovery unit so that the “Boost” function can be activated. When using the cooker hood, it is necessary to switch on the heat recovery unit’s “Boost” function so that too much air is not extracted from the premises.

In airtight A, A+, and A++ homes, we recommend using only a recirculating cooker hood.