Thermia Atria Optimum

    • Reduce your energy consumption by up to 75%
    • The heat pump unit is located indoors
    • Efficient energy savings at temperatures as low as -20 °C
    • TWS technology for efficient hot water production
    • Very low sound level
    • One solution – heating and domestic hot water
    • Online – control your heat pump from anywhere
Thermia Atria Optimum

Energy class when the heat pump is part of an integrated system


Energy class when the heat pump is the sole heat generator Energy class according to Eco-design Directive 811/2013



  • Efficient performance in all seasons

    Efficient performance in all seasons

    With an impressive coefficient of performance (COP) of 3.7 (Atria Optimum 8 at A7/W35 according to EN14511) Thermia Atria Optimum delivers up to 75 % of energy savings. COP is a measure of heat pump efficiency and indicates the relationship between the amount of energy produced and the amount consumed. The higher the number, the better the system.

    The heat pump consists of two units – one indoor part and one outdoor part. As all of Atria Optimum’s essential parts (such as the compressor and electronic controls) are located indoors, the heat pump is particularly well suited to locations with harsh weather conditions and a cold climate.

  • Heating


    Most common European heating systems are water-based, with heat being distributed via radiators or hydronic floor heating. The output temperature of the water distribution system is usually 30-35°C for floor heating and 45-55°C for radiators. Thermia heat pumps offer a low-carbon alternative to traditional boilers in modern buildings, whether for new-builds or refurbishments and regardless of the temperature required in the heating system.

  • More hot water, faster

    More hot water, faster

    The hot water tank is fitted with our TWS (Tap Water Stratification) technology, which means that hot water is produced faster and at higher temperatures than with traditional technology. Because the hot water is diluted to tap water temperature, the volume of usable hot water is considerably higher due to the high temperature.

    Thermia versus other brands in terms of hot water production:

    Thermia with TWS technology Typical traditional water heater
    • Recharging from 40°C to full load for a water heater using TWS technology: just 21 mins.
    •  Recharging from 40°C to full load for traditional water heater: 50 mins.
    • Time to fully recharge tank after peak consumption: 21 mins.
    •  Time to fully recharge tank after peak consumption: 50 min.
  • Intelligent control system

    Intelligent control system

    The controller coordinates and controls the heating system. Thermia heat pumps work with complete precision to give your home the best possible indoor climate at the lowest possible cost. Our controller is very easy to use.

    The controller displays visualized heat curves and, once it is set, you never need to think about it again. Raising or lowering the temperature can be achieved at the touch of a button.

  • Optimum technology

    Optimum technology

    Optimum Technology is a technology that constantly monitors your system and adjusts the pump’s performance accordingly. Speed-controlled Class-A circulation pumps guarantee that daily operation is always adjusted according to the user’s requirements and conditions. That means you can be sure your heat pump is always running at its most efficient level.

  • Low sound level

    Low sound level

    Because the heat pump unit is placed indoor, don’t need to worry about sound issues, such as disturbing neighbors. The outdoor unit use only speed-modulated fans and the sound level of Atria to one of the lowest on the market.

  • Thermia Online

    Thermia Online

    The Thermia Online app enables you to check that your heating system is working properly, reduce the temperature when you are on holiday, or receive a notification if anything unexpected comes up. Our online system provides installers with comprehensive diagnostics data and also enables them to respond promptly to notifications or access a live feed on system performance. The Thermia Online app is available for both Android and iPhone.

  • The essence of Scandinavian design

    The essence of Scandinavian design

    Thermia Atria Optimum is built on 40 years of experience in developing and supplying heat pumps. The clean, Scandinavian design of the outdoor and indoor units allows the product to effortlessly blend in with its surroundings.

Climate protection begins at home

Climate protection begins at home

Air and ground source heat pumps have the potential to reduce your home’s CO2 emissions by up to 50% and can act as your individual contribution to the commitment to source 20% of European energy from renewable sources by 2020.


See marketing and technical literature about Atria Optimum


If you have any questions please contact us

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Thermia Heat Pumps

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