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EKO2 Academy
Answers before you decide: heating, cooling, ventilation, energy consumption, equipment selection, business and maintenance.
Heating
Air-to-water or geothermal heating: the differences and how to choose
An air-to-water heat pump takes heat from outdoor air, so it is simpler and quicker to install; a geothermal (ground-source) unit takes it from…
Heat pumps in the Lithuanian climate: how they perform at −25 °C and below
A modern heat pump keeps heating through a Lithuanian winter, but its output and efficiency fall as the outdoor temperature drops. So the key…
How a heat pump works: the principle in plain words
A heat pump works like a refrigerator in reverse: it takes heat from outdoor air, the ground or water and moves it into your…
Cooling
What size air conditioner does a room need? A 40 m² example
An air conditioner is sized by the room's heat gains, not by floor area alone: sun through windows, orientation, people, equipment and ceiling height…
Multi Split or several separate units: what suits your home
In a Multi Split system several indoor units connect to one outdoor unit, so the façade has a single box – handy where outdoor…
Ventilation
Which heat recovery ventilator does your home need?
A heat recovery ventilator is chosen by the required airflow (m³/h), the type of building and whether ducts can be installed. Houses with space…
Ducted MVHR or a decentralised unit for an apartment: how to choose
If ducts can be run in the apartment (renovation, suspended ceilings), a central ventilation unit serves all rooms from one box. If they cannot,…
Energy consumption
Gas boiler or heat pump: what to know before you switch
A gas boiler makes heat by burning fuel, while a heat pump uses electricity to move ambient heat into the house – so one…
Heat pump electricity use in winter: how to estimate it
A heat pump's winter electricity use depends on how much heat the house loses and how efficiently the unit produces that heat at a…
SCOP, SEER, COP and EER: what heat pump efficiency ratings mean
COP and EER show how much heat or cooling a unit delivers per kWh of electricity under specific test conditions, while SCOP and SEER…
Equipment selection
What size heat pump do I need? Sizing logic and a 150 m² example
A heat pump is sized to the building's heat loss at the design outdoor temperature, not to floor area alone. As a rough approximation…
Air-to-air or air-to-water heat pump: which one is right for you?
An air-to-air heat pump heats and cools the room air directly – a quick solution for individual spaces or to supplement an existing system.…
Heat pump cost: what makes up the price
The cost of a heat pump is more than the unit itself: installation materials, labour, electrical connection, commissioning, chosen options and the specifics of…
For business
VRF / City Multi for offices: when it makes sense and how to design it
A VRF system such as Mitsubishi Electric City Multi connects many indoor units to one outdoor system and lets each zone heat or cool…
Server room cooling: what you need to consider
A server room needs an air conditioner that cools all year round, including in winter when it is cold outside, so the model's cooling…
HVAC design: from brief to a working system
An HVAC (heating, ventilation and air conditioning) design defines which equipment is installed, where and how, so the building gets the heat, cooling and…
Maintenance
Heat recovery ventilator filters and maintenance: when to replace and what to leave to a technician
The manufacturer recommends replacing heat recovery ventilator filters roughly every six months, but the real interval depends on where you live: near busy roads,…
Air conditioner and heat pump maintenance: what you can do and what needs a technician
As the owner, you clean the indoor unit filters following the manual, keep the outdoor unit clear of snow and leaves, and check that…