AERO – AIR SOURCE HEAT PUMPS<\/h1><\/div>An air source heat pump is an electrically-driven heating and cooling device that extracts renewable thermal energy from the outdoor air. Manufactured by iDM Energiesysteme GmbH in Matrei in Osttirol, Austria, the iDM AERO series achieves this using a highly efficient vapour-compression cycle. Our AERO models provide an output range from 2 kW to 50 kW and proudly carry the highest A+++ EU energy label class. Whether you are planning a new build or a retrofit renovation, these systems are perfectly suited for domestic hot water preparation, space heating, and active cooling in single-family houses, apartments, and commercial buildings. Let’s explore how air source heat pumps work, the different types available, and why the iDM AERO is the right choice for your property.<\/p>\n<\/div><\/div><\/div>
![](\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2021\/01\/iDM-Waermequelle-Luft-\u00a9supaCGI-inkl.-iDM-Logo-web-scaled.jpg\" "\\"iDM")
<\/span><\/div><\/div><\/div><\/div><\/div>OUR PRODUCTS<\/h2><\/div>![](\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/AERO-ALM-2-8-und-4-12_IE-AE_Rueck-und-Front_WEB_MartinLugger-5.webp\")
<\/a><\/span><\/div>AERO ALM<\/a><\/h2><\/div>The iDM AERO ALM series offers a selection of air source heat pumps with output ranges from 2 kW to 24 kW, ideal for domestic hot water use, heating and building temperature control. Thanks to stepless modulation, they adapt perfectly to individual heat requirements and operate with maximum efficiency.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>![](\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/AERO-SLM-3-11-AEIE_WEB_MartinLugger-5.webp\")
<\/a><\/span><\/div>AERO SLM<\/a><\/h2><\/div>The iDM AERO SLM is a modulating air source heat pump that continuously adjusts its heat output between 3 - 11 kW or 6-17 kW to the current heat requirements. It is suitable for efficient heating, cooling and domestic hot water preparation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>![](\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/AERO-ALM-10-50-Max_IEAE_WEB_MartinLugger-5.webp\")
<\/a><\/span><\/div>AERO ALM MAX<\/a><\/h2><\/div>The iDM AERO ALM 10-50 MAX is a modulating air source heat pump that offers efficient output adjustment. The heat pump's output is continuously adjusted between 10-50 kW to the current heating and cooling requirements using modulation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>![](\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/AERO-AL-32-Twin_IEAE_WEB_MartinLugger-5.webp\")
<\/a><\/span><\/div>AL TWIN<\/a><\/h2><\/div>The iDM AL TWIN is designed for the higher output requirements of larger buildings. With a heat output of 32 kW per unit and up to 160 kW in cascade mode, this heat pump easily covers the heating needs of larger properties.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>How does an air source heat pump work?<\/h2>\n\nAn air source heat pump extracts thermal energy from outdoor air using a vapour-compression refrigeration cycle. A refrigerant absorbs heat in the evaporator, the compressor raises its temperature, and the condenser transfers heat to the building’s heating circuit \u2014 even at outdoor temperatures down to \u221220 \u00b0C.<\/p>\n<\/blockquote>\n
First, the outdoor unit draws in ambient air, passing it over an evaporator. Inside, a liquid refrigerant absorbs the air’s latent heat and turns into a gas. Second, an inverter compressor squeezes this gas, significantly increasing its pressure and temperature. Third, the hot gas travels to the condenser, where it transfers its heat to your building’s heating circuit. Finally, an expansion valve reduces the pressure, turning the refrigerant back into a cool liquid so the cycle can begin again.<\/p>\n
Because we are transferring existing heat rather than burning fuel, the useful heat output is typically 3 to 5 times greater than the electrical input consumed by the compressor, a concept known as the Coefficient of Performance (COP).<\/p>\n
If you would like to explore the thermodynamics in more detail, you can learn how the air source heat pump<\/a> refrigeration cycle works.<\/p>\n<\/div>Types of Air Source Heat Pumps<\/h2>\n
When exploring your options, it is helpful to understand the primary types of air source heat pumps on the market<\/span><\/span>.<\/span><\/p>\n\n- \n
Air Source Heat Pump Air to Water:<\/span><\/b> This is the most common and efficient type for central heating, and the category that the iDM AERO series falls into<\/span><\/span>. <\/span>It extracts heat from the air and transfers it to water, which is then circulated through compatible emitters like underfloor heating, low-temperature radiators, and domestic hot water (DHW) cylinders<\/span><\/span>.<\/span><\/p>\n<\/li>\n- \n
Monobloc vs. Split Systems:<\/span><\/b> Installation types generally fall into two categories<\/span><\/span>. <\/span>Monobloc heat pumps contain all refrigeration components within a single outdoor unit, transferring water directly into the home<\/span><\/span>. <\/span>Split heat pumps divide the components between an outdoor unit and an indoor unit, connected by refrigerant lines<\/span><\/span>.<\/span><\/p>\n<\/li>\n<\/ul>\n<\/div>How efficient is an iDM AERO air source heat pump?<\/h2>\n\nThe iDM AERO series achieves a Seasonal Coefficient of Performance (SCOP) of up to 4.5 under EN 14511 test conditions, meaning it produces 4.5 kWh of heat for every 1 kWh of electricity consumed. This earns the highest A+++ EU energy label classification.<\/p>\n<\/blockquote>\n
We measure system performance using the Coefficient of Performance (COP) and the Seasonal Coefficient of Performance (SCOP). While COP gives you a snapshot of efficiency, SCOP calculates the average efficiency over an entire heating season, making it the most meaningful metric for real-world running costs.<\/p>\n
Because our units feature stepless inverter modulation, the compressor adjusts its output continuously, which avoids wasteful on\/off cycling losses and ensures high seasonal efficiency. For example, a 10 kW system operating with a SCOP of 4.5 will produce 45,000 kWh of equivalent heat over a season while only drawing 10,000 kWh of electricity. Under the ErP directive, this performance secures the A+++ energy efficiency class.<\/p>\n<\/div>\n
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An air source heat pump is an electrically-driven heating and cooling device that extracts renewable thermal energy from the outdoor air. Manufactured by iDM Energiesysteme GmbH in Matrei in Osttirol, Austria, the iDM AERO series achieves this using a highly efficient vapour-compression cycle. Our AERO models provide an output range from 2 kW to 50 kW and proudly carry the highest A+++ EU energy label class. Whether you are planning a new build or a retrofit renovation, these systems are perfectly suited for domestic hot water preparation, space heating, and active cooling in single-family houses, apartments, and commercial buildings. Let’s explore how air source heat pumps work, the different types available, and why the iDM AERO is the right choice for your property.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div>OUR PRODUCTS<\/h2><\/div>- <\/a><\/span><\/div>
AERO ALM<\/a><\/h2><\/div>The iDM AERO ALM series offers a selection of air source heat pumps with output ranges from 2 kW to 24 kW, ideal for domestic hot water use, heating and building temperature control. Thanks to stepless modulation, they adapt perfectly to individual heat requirements and operate with maximum efficiency.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>- <\/a><\/span><\/div>
AERO SLM<\/a><\/h2><\/div>The iDM AERO SLM is a modulating air source heat pump that continuously adjusts its heat output between 3 - 11 kW or 6-17 kW to the current heat requirements. It is suitable for efficient heating, cooling and domestic hot water preparation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>- <\/a><\/span><\/div>
AERO ALM MAX<\/a><\/h2><\/div>The iDM AERO ALM 10-50 MAX is a modulating air source heat pump that offers efficient output adjustment. The heat pump's output is continuously adjusted between 10-50 kW to the current heating and cooling requirements using modulation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li>- <\/a><\/span><\/div>
AL TWIN<\/a><\/h2><\/div>The iDM AL TWIN is designed for the higher output requirements of larger buildings. With a heat output of 32 kW per unit and up to 160 kW in cascade mode, this heat pump easily covers the heating needs of larger properties.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>How does an air source heat pump work?<\/h2>\n\nAn air source heat pump extracts thermal energy from outdoor air using a vapour-compression refrigeration cycle. A refrigerant absorbs heat in the evaporator, the compressor raises its temperature, and the condenser transfers heat to the building’s heating circuit \u2014 even at outdoor temperatures down to \u221220 \u00b0C.<\/p>\n<\/blockquote>\n
First, the outdoor unit draws in ambient air, passing it over an evaporator. Inside, a liquid refrigerant absorbs the air’s latent heat and turns into a gas. Second, an inverter compressor squeezes this gas, significantly increasing its pressure and temperature. Third, the hot gas travels to the condenser, where it transfers its heat to your building’s heating circuit. Finally, an expansion valve reduces the pressure, turning the refrigerant back into a cool liquid so the cycle can begin again.<\/p>\n
Because we are transferring existing heat rather than burning fuel, the useful heat output is typically 3 to 5 times greater than the electrical input consumed by the compressor, a concept known as the Coefficient of Performance (COP).<\/p>\n
If you would like to explore the thermodynamics in more detail, you can learn how the air source heat pump<\/a> refrigeration cycle works.<\/p>\n<\/div>Types of Air Source Heat Pumps<\/h2>\n
When exploring your options, it is helpful to understand the primary types of air source heat pumps on the market<\/span><\/span>.<\/span><\/p>\n\n- \n
Air Source Heat Pump Air to Water:<\/span><\/b> This is the most common and efficient type for central heating, and the category that the iDM AERO series falls into<\/span><\/span>. <\/span>It extracts heat from the air and transfers it to water, which is then circulated through compatible emitters like underfloor heating, low-temperature radiators, and domestic hot water (DHW) cylinders<\/span><\/span>.<\/span><\/p>\n<\/li>\n- \n
Monobloc vs. Split Systems:<\/span><\/b> Installation types generally fall into two categories<\/span><\/span>. <\/span>Monobloc heat pumps contain all refrigeration components within a single outdoor unit, transferring water directly into the home<\/span><\/span>. <\/span>Split heat pumps divide the components between an outdoor unit and an indoor unit, connected by refrigerant lines<\/span><\/span>.<\/span><\/p>\n<\/li>\n<\/ul>\n<\/div>How efficient is an iDM AERO air source heat pump?<\/h2>\n\nThe iDM AERO series achieves a Seasonal Coefficient of Performance (SCOP) of up to 4.5 under EN 14511 test conditions, meaning it produces 4.5 kWh of heat for every 1 kWh of electricity consumed. This earns the highest A+++ EU energy label classification.<\/p>\n<\/blockquote>\n
We measure system performance using the Coefficient of Performance (COP) and the Seasonal Coefficient of Performance (SCOP). While COP gives you a snapshot of efficiency, SCOP calculates the average efficiency over an entire heating season, making it the most meaningful metric for real-world running costs.<\/p>\n
Because our units feature stepless inverter modulation, the compressor adjusts its output continuously, which avoids wasteful on\/off cycling losses and ensures high seasonal efficiency. For example, a 10 kW system operating with a SCOP of 4.5 will produce 45,000 kWh of equivalent heat over a season while only drawing 10,000 kWh of electricity. Under the ErP directive, this performance secures the A+++ energy efficiency class.<\/p>\n<\/div>\n
\n
- <\/a><\/span><\/div>
AERO ALM<\/a><\/h2><\/div>
The iDM AERO ALM series offers a selection of air source heat pumps with output ranges from 2 kW to 24 kW, ideal for domestic hot water use, heating and building temperature control. Thanks to stepless modulation, they adapt perfectly to individual heat requirements and operate with maximum efficiency.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/a><\/span><\/div>AERO SLM<\/a><\/h2><\/div>
The iDM AERO SLM is a modulating air source heat pump that continuously adjusts its heat output between 3 - 11 kW or 6-17 kW to the current heat requirements. It is suitable for efficient heating, cooling and domestic hot water preparation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/a><\/span><\/div>AERO ALM MAX<\/a><\/h2><\/div>
The iDM AERO ALM 10-50 MAX is a modulating air source heat pump that offers efficient output adjustment. The heat pump's output is continuously adjusted between 10-50 kW to the current heating and cooling requirements using modulation.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/a><\/span><\/div>AL TWIN<\/a><\/h2><\/div>
The iDM AL TWIN is designed for the higher output requirements of larger buildings. With a heat output of 32 kW per unit and up to 160 kW in cascade mode, this heat pump easily covers the heating needs of larger properties.<\/div><\/div><\/div>More details<\/span><\/a><\/div><\/div><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>How does an air source heat pump work?<\/h2>\n
\n
An air source heat pump extracts thermal energy from outdoor air using a vapour-compression refrigeration cycle. A refrigerant absorbs heat in the evaporator, the compressor raises its temperature, and the condenser transfers heat to the building’s heating circuit \u2014 even at outdoor temperatures down to \u221220 \u00b0C.<\/p>\n<\/blockquote>\n
First, the outdoor unit draws in ambient air, passing it over an evaporator. Inside, a liquid refrigerant absorbs the air’s latent heat and turns into a gas. Second, an inverter compressor squeezes this gas, significantly increasing its pressure and temperature. Third, the hot gas travels to the condenser, where it transfers its heat to your building’s heating circuit. Finally, an expansion valve reduces the pressure, turning the refrigerant back into a cool liquid so the cycle can begin again.<\/p>\n
Because we are transferring existing heat rather than burning fuel, the useful heat output is typically 3 to 5 times greater than the electrical input consumed by the compressor, a concept known as the Coefficient of Performance (COP).<\/p>\n
If you would like to explore the thermodynamics in more detail, you can learn how the air source heat pump<\/a> refrigeration cycle works.<\/p>\n<\/div>
Types of Air Source Heat Pumps<\/h2>\n
When exploring your options, it is helpful to understand the primary types of air source heat pumps on the market<\/span><\/span>.<\/span><\/p>\n
- \n
- \n
Air Source Heat Pump Air to Water:<\/span><\/b> This is the most common and efficient type for central heating, and the category that the iDM AERO series falls into<\/span><\/span>. <\/span>It extracts heat from the air and transfers it to water, which is then circulated through compatible emitters like underfloor heating, low-temperature radiators, and domestic hot water (DHW) cylinders<\/span><\/span>.<\/span><\/p>\n<\/li>\n
- \n
Monobloc vs. Split Systems:<\/span><\/b> Installation types generally fall into two categories<\/span><\/span>. <\/span>Monobloc heat pumps contain all refrigeration components within a single outdoor unit, transferring water directly into the home<\/span><\/span>. <\/span>Split heat pumps divide the components between an outdoor unit and an indoor unit, connected by refrigerant lines<\/span><\/span>.<\/span><\/p>\n<\/li>\n<\/ul>\n<\/div>
How efficient is an iDM AERO air source heat pump?<\/h2>\n
\n
The iDM AERO series achieves a Seasonal Coefficient of Performance (SCOP) of up to 4.5 under EN 14511 test conditions, meaning it produces 4.5 kWh of heat for every 1 kWh of electricity consumed. This earns the highest A+++ EU energy label classification.<\/p>\n<\/blockquote>\n
We measure system performance using the Coefficient of Performance (COP) and the Seasonal Coefficient of Performance (SCOP). While COP gives you a snapshot of efficiency, SCOP calculates the average efficiency over an entire heating season, making it the most meaningful metric for real-world running costs.<\/p>\n
Because our units feature stepless inverter modulation, the compressor adjusts its output continuously, which avoids wasteful on\/off cycling losses and ensures high seasonal efficiency. For example, a 10 kW system operating with a SCOP of 4.5 will produce 45,000 kWh of equivalent heat over a season while only drawing 10,000 kWh of electricity. Under the ErP directive, this performance secures the A+++ energy efficiency class.<\/p>\n<\/div>\n
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