--- title: This is why induction is important for your indoor comfort description: Thanks to the physical principle known as induction, there is the option of ventilating and heating or cooling spaces so as to achieve the perfect indoor climate all year round. image: https://blog.swegon.com/hubfs/indoorcomfort.png --- [![](https://www.swegon.com/Static/img/logo.svg?v=3)](https://www.swegon.com/na/) Menu - [Solutions & Services](https://www.swegon.com/na/solutions-and-services/) - [Products](https://www.swegon.com/na/products-and-services/) - [References & Insights](https://www.swegon.com/na/references-and-insights/) - [Support & Software](https://www.swegon.com/na/support/) - [Sustainability](https://www.swegon.com/na/sustainability/) - [Why Swegon?](https://www.swegon.com/na/why-swegon/) - [Product Search](https://www.swegon.com/na/product-search-result/) - [Document Search](https://www.swegon.com/na/support/find-documents/) - [Career](https://career.swegonnorthamerica.com/?__hstc=90448965.46d6fb9011873e48965818427a3d6f0d.1747056956577.1756736344325.1756796067195.177&__hssc=90448965.5657.1756796067195&__hsfp=3315655689) - North America - [Contact](https://www.swegon.com/na/contact/) ## Choose a market [Or visit our global site](https://www.swegon.com) - [Belgium - French](https://www.swegon.com/fr-be/) - [Belgium - Dutch](https://www.swegon.com/nl-be/) - [Denmark](https://www.swegon.com/da/) - [Finland](https://www.swegon.com/fi/) - [France](https://www.swegon.com/fr/) - [Italy](https://www.swegon.com/it/) - [Germany](https://www.swegon.com/de/) - [Norway](https://www.swegon.com/no/) - [Poland](https://www.swegon.com/pl/) - [Spain](https://www.swegon.com/es/) - [Sweden](https://www.swegon.com/sv/) - [Switzerland - German](https://www.swegon.com/de-ch/) - [Switzerland - French](https://www.swegon.com/fr-ch/) - [Switzerland - Italian](https://www.swegon.com/it-ch/) - [United Kingdom](https://www.swegon.com/uk/) - [United States](https://www.swegon.com/na/) - [Canada](https://www.swegon.com/na/) Explore ## Filter articles ### By topics - [Indoor Climate Knowledge (13)](https://blog.swegon.com/na/tag/indoor-climate-knowledge) - [Air Handling Units (7)](https://blog.swegon.com/na/tag/air-handling-units) - [Cooling & Heating (6)](https://blog.swegon.com/na/tag/cooling-heating) - [Energy Efficiency (6)](https://blog.swegon.com/na/tag/energy-efficiency) - [Humidity (4)](https://blog.swegon.com/na/tag/humidity) - [AHRI (3)](https://blog.swegon.com/na/tag/ahri) - [ERV (3)](https://blog.swegon.com/na/tag/erv) - [Heat recovery effectiveness (3)](https://blog.swegon.com/na/tag/heat-recovery-effectiveness) - [PHI (3)](https://blog.swegon.com/na/tag/phi) - [Room Units (3)](https://blog.swegon.com/na/tag/room-units) - [balanced flow (3)](https://blog.swegon.com/na/tag/balanced-flow) - [continuous ventilation (3)](https://blog.swegon.com/na/tag/continuous-ventilation) - [cross-contamination (3)](https://blog.swegon.com/na/tag/cross-contamination) - [heat recovery (3)](https://blog.swegon.com/na/tag/heat-recovery) - [indoor environmental quality (3)](https://blog.swegon.com/na/tag/indoor-environmental-quality) - [passive house (3)](https://blog.swegon.com/na/tag/passive-house) - [HRV (2)](https://blog.swegon.com/na/tag/hrv) - [Heat Pumps (2)](https://blog.swegon.com/na/tag/heat-pumps) - [Renovation (2)](https://blog.swegon.com/na/tag/renovation) - [Schools (2)](https://blog.swegon.com/na/tag/schools) - [energy recovery (2)](https://blog.swegon.com/na/tag/energy-recovery) - [specific power (2)](https://blog.swegon.com/na/tag/specific-power) - [Acoustics (1)](https://blog.swegon.com/na/tag/acoustics) - [Air Quality (1)](https://blog.swegon.com/na/tag/air-quality) - [Commercial HVAC Systems (1)](https://blog.swegon.com/na/tag/commercial-hvac-systems) - [DOAS (1)](https://blog.swegon.com/na/tag/doas) - [Facility Services (1)](https://blog.swegon.com/na/tag/facility-services) - [Gender Equality (1)](https://blog.swegon.com/na/tag/gender-equality) - [HVACsystem (1)](https://blog.swegon.com/na/tag/hvacsystem) - [Optimisation Systems (1)](https://blog.swegon.com/na/tag/optimisation-systems) - [Rotary Heat Exchangers (1)](https://blog.swegon.com/na/tag/rotary-heat-exchangers) - [Schools and HVAC (1)](https://blog.swegon.com/na/tag/schools-and-hvac) - [Services & Connectivity (1)](https://blog.swegon.com/na/tag/services-connectivity) - [airhandlingUnit (1)](https://blog.swegon.com/na/tag/airhandlingunit) - [heatexchanger (1)](https://blog.swegon.com/na/tag/heatexchanger) > Fler ### By authors - [![Alberto Ferrandi](https://blog.swegon.com/hs-fs/hubfs/Bild%20alberto.png?width=75&name=Bild%20alberto.png) Alberto Ferrandi 3](https://blog.swegon.com/na/author/alberto-ferrandi) - [![Alessandro Pinato](https://blog.swegon.com/hs-fs/hubfs/alessandro.webp?width=75&name=alessandro.webp) Alessandro Pinato 1](https://blog.swegon.com/na/author/alessandro-pinato) - [![Andreas Söderholm](https://blog.swegon.com/hs-fs/hubfs/andreassoderholm.webp?width=75&name=andreassoderholm.webp) Andreas Söderholm 1](https://blog.swegon.com/na/author/andreas-söderholm) - [![Andreas Örje Wellstam](https://blog.swegon.com/hs-fs/hubfs/andreas-orje-wellstam.webp?width=75&name=andreas-orje-wellstam.webp) Andreas Örje Wellstam 4](https://blog.swegon.com/na/author/andreas-örje-wellstam) - [![Carl-Johan Strömwall](https://blog.swegon.com/hs-fs/hubfs/sigvardsson_220628_0008_small_webb%20(1).jpg?width=75&name=sigvardsson_220628_0008_small_webb%20(1).jpg) Carl-Johan Strömwall 1](https://blog.swegon.com/na/author/carl-johan-strömwall) - [![Carl-Ola Danielsson](https://blog.swegon.com/hs-fs/hubfs/Carl%20Ola%20Danielsson.png?width=75&name=Carl%20Ola%20Danielsson.png) Carl-Ola Danielsson 2](https://blog.swegon.com/na/author/carl-ola-danielsson-1) - [![Caroline Jacobsson](https://blog.swegon.com/hs-fs/hubfs/Blog%20Authors/Caroline%20Jacobsson.jpg?width=75&name=Caroline%20Jacobsson.jpg) Caroline Jacobsson 1](https://blog.swegon.com/na/author/caroline-jacobsson) - [![Fabio Polo](https://blog.swegon.com/hs-fs/hubfs/Fabio%20Polo-1.jpg?width=75&name=Fabio%20Polo-1.jpg) Fabio Polo 1](https://blog.swegon.com/na/author/fabio-polo) - [![Federica Serena](https://blog.swegon.com/hs-fs/hubfs/Serena.webp?width=75&name=Serena.webp) Federica Serena 1](https://blog.swegon.com/na/author/federica-serena) - [Hugh Crowther 3](https://blog.swegon.com/na/author/hugh-crowther) - [![Mikael Börjesson](https://blog.swegon.com/hs-fs/hubfs/Blog%20Authors/Mikael%20B%C3%B6rjesson.jpg?width=75&name=Mikael%20B%C3%B6rjesson.jpg) Mikael Börjesson 6](https://blog.swegon.com/na/author/mikael-börjesson) - [Mike Woolsey 4](https://blog.swegon.com/na/author/mike-woolsey) - [![Swegon](https://blog.swegon.com/hs-fs/hubfs/swegsw-1.png?width=75&name=swegsw-1.png) Swegon 1](https://blog.swegon.com/na/author/swegon) - [![Timo Schreck](https://blog.swegon.com/hs-fs/hubfs/Timo%20Schreck.jpg?width=75&name=Timo%20Schreck.jpg) Timo Schreck 2](https://blog.swegon.com/na/author/timo-schreck) - [![Tony Pettersson](https://blog.swegon.com/hs-fs/hubfs/tonyp.jpg?width=75&name=tonyp.jpg) Tony Pettersson 1](https://blog.swegon.com/na/author/tony-pettersson) - [![William Lawrance](https://blog.swegon.com/hs-fs/hubfs/William_lawrance.jpg?width=75&name=William_lawrance.jpg) William Lawrance 4](https://blog.swegon.com/na/author/william-lawrance) - [![Åsa Norén-Lundh](https://blog.swegon.com/hs-fs/hubfs/A%CC%8Asa%20Nore%CC%81n-Lundh.webp?width=75&name=A%CC%8Asa%20Nore%CC%81n-Lundh.webp) Åsa Norén-Lundh 3](https://blog.swegon.com/na/author/åsa-norén-lundh) Explore - - - [NA | Blog](https://blog.swegon.com/na) Subscribe Share - - - Explore Share Subscribe [« go back](https://blog.swegon.com/na) # This is why induction is important for your indoor comfort [Åsa Norén-Lundh](https://blog.swegon.com/na/author/åsa-norén-lundh) Dec 9, 2023 4:50:04 AM **Imagine if you were forced to choose between a room that can’t be cooled in hot weather, or a room with a constant cold draught. You’d be hard-pressed to choose, right? Happily, you don’t have to. Thanks to the physical principle known as induction, there is the option of ventilating and heating or cooling spaces so as to achieve the perfect indoor climate all year round.** In a ventilation context, induction refers to the effect caused when a high-speed jet of air passes stagnant air. That jet of air drags with it the ambient air, mixes with it and increases in volume. ### But why is induction so important? One reason is that we can use that induction effect to introduce high cooling or heating capacity into building spaces without any risk of causing local cold draught spots in the room, causing discomfort to the building occupants. If you want to supply air and cooling into a room by means of an air diffuser, then the induction causes the supply air jetting from the air diffuser to maintain a relatively low temperature of 18 °C, say. Because the air jets entrain the warm ambient air and mix with it, the air can achieve a comfortable temperature before it reaches the occupied zone. This is what we refer to as basic induction, but there are also products that harness the induction for a dual effect, such as chilled beams and comfort modules based on waterborne cooling and heating. If we look at a cross-section of a comfort module, we can trace how the air moves through the product via a number of stages: ## ![Vad är induktion_2](https://blog.swegon.com/hs-fs/hubfs/Swegon%20SV-SE%20-%20PRO_Blogg/Images/Vad%20%C3%A4r%20induktion/Vad%20%C3%A4r%20induktion_2.jpg?width=1600&name=Vad%20%C3%A4r%20induktion_2.jpg) ### How the air moves through the comfort module in five steps **1.** Cold supply air from the air handling unit builds up overpressure, which is ejected in small jets inside the unit. **2**.Induction drags with it the ambient air, which causes underpressure and sucks in warm air from the room, which is cooled as it passes through a water coil. **3.** The supply air is now mixed a first time with the air from the room, which increases the air volume and lowers the temperature. **4.** Next, the air flows out along the ceiling and induction causes the supply air to mix for a second time with the ambient air. **5.** When the air flows out into the room high cooling capacity has been introduced, but since the cool air has been “diluted” from being mixed with the room air, the air flow is at a comfortable level, without the risk of uncomfortable cold draught. In this way, an original supply air flow rate of 20 l/s at a temperature of  18.0 °C (stage 1 in the illustration above), and a flow through the water coil at 14 °C, is transformed into an air flow of 190 l/s with a pleasant temperature of 20.4 °C (stage 5 in the illustration above). Induction thus serves as a “mixer” which causes the cool supply air and the warm ambient air to combine into a comfortable temperature. In addition, the induction serves as an “engine” to drive the air through the water coil to provide an extra cooling effect. The result is fresh air at the right temperature without noisy fans or the risk of uncomfortable cold draught in the occupied zone. Ingenious! Topics: - [Room Units](https://blog.swegon.com/na/tag/room-units) - - - [![Åsa Norén-Lundh](https://blog.swegon.com/hs-fs/hubfs/A%CC%8Asa%20Nore%CC%81n-Lundh.webp?width=200&name=A%CC%8Asa%20Nore%CC%81n-Lundh.webp)](https://blog.swegon.com/na/author/åsa-norén-lundh) [Åsa Norén-Lundh](https://blog.swegon.com/na/author/åsa-norén-lundh) Åsa Norén-Lundh is Indoor Environment Competence Center Manager at Swegon Group. Åsa's expertise is to, internally and externally, encourage and advance knowledge and research about the indoor climate. Åsa has great passion for solutions that create an indoor climate that makes people feel good inside. ## Recommended reading - [Indoor Climate Knowledge](https://blog.swegon.com/na/tag/indoor-climate-knowledge) - [Room Units](https://blog.swegon.com/na/tag/room-units) ### [Carl-Ola Danielsson](https://blog.swegon.com/na/author/carl-ola-danielsson-1) ## [Active chilled beams vs fan coil units](https://blog.swegon.com/na/how-to-choose-between-active-chilled-beams-and-fan-coils-0) Active chilled beams and fan coils are two different types of … - [Room Units](https://blog.swegon.com/na/tag/room-units) ### [Åsa Norén-Lundh](https://blog.swegon.com/na/author/åsa-norén-lundh) ## [Things to consider when choosing room units for variable air flows](https://blog.swegon.com/na/things-to-consider-when-choosing-room-units-with-variable-flows-0) There are a few things to consider when choosing room units for … Get updates from the blog directly to your inbox. #### Get to know us - [Why Swegon?](https://www.swegon.com/na/why-swegon/) - [Solutions & services](https://www.swegon.com/na/solutions-and-services/) - [Products](https://www.swegon.com/na/products/) - [References & Insights](https://www.swegon.com/na/references-and-insights/) - [Support & Software](https://www.swegon.com/na/support/) - [Sustainability](https://www.swegon.com/na/sustainability/) #### More Swegon - [About us](https://www.swegon.com/na/about-swegon/) - [News](https://blog.swegon.com/na/news/) - [Career at Swegon](https://career.swegonnorthamerica.com/) - [For suppliers](https://www.swegon.com/na/for-suppliers/) - [The Swegon Blog](https://blog.swegon.com/na/) - [Swegon Air Academy](https://www.swegonairacademy.com/en/) [![](https://www.swegon.com/siteassets/logos/swegon-logo-white.svg)](https://www.swegon.com/) © 2020-2026 Swegon North America, 3 Keensford Court, Unit 1, Ajax, ON L1Z 0K4, Canada, T 416-291-7371 - [Privacy statement](https://www.swegon.com/na/privacy-policy/) - [Cookies](https://www.swegon.com/na/cookies/) - [Processing personal data](https://www.swegon.com/na/privacy-policy/processing-personal-data/) - [Vulnerability disclosure policy](https://www.swegon.com/na/vulnerability-disclosure-policy/) - [![Youtube](https://www.swegon.com/Static/img/youtube.svg)](https://www.youtube.com/channel/UC06JhJ0b4AToqgFeWCXIcZg) - [![Linkedin](https://www.swegon.com/Static/img/linkedin.svg)](https://ca.linkedin.com/company/swegon-north-america) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Åsa Norén-Lundh", "url" : "https://blog.swegon.com/na/author/åsa-norén-lundh" }, "dateModified" : "2023-12-09T03:50:04.023Z", "datePublished" : "2023-12-09T03:50:04.000Z", "headline" : "This is why induction is important for your indoor comfort", "image" : [ "https://blog.swegon.com/hubfs/indoorcomfort.png" ], "mainEntityOfPage" : { "@id" : "https://blog.swegon.com/na/this-why-induction-is-important-for-indoor-comfort-0", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.swegon.com/hubfs/Assets/logo/Swegon_RGB_Logotype.png" }, "name" : "Swegon Group AB" } } ```