{"id":5936,"date":"2025-06-04T09:29:59","date_gmt":"2025-06-04T08:29:59","guid":{"rendered":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?page_id=5936"},"modified":"2025-06-04T09:31:43","modified_gmt":"2025-06-04T08:31:43","slug":"vent-axia-sentinel-kinetic-mvhr-integration-with-home-assistant","status":"publish","type":"page","link":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?page_id=5936","title":{"rendered":"Vent-Axia Sentinel Kinetic MVHR Integration with Home Assistant"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>The Outbuildings are getting a <a href=\"https:\/\/www.vent-axia.com\/range\/lo-carbon-sentinel-kinetic-bh\" target=\"_blank\" rel=\"noreferrer noopener\">Vent-Axia Lo-Carbon Sentinel Kinetic BH MVHR unit<\/a> which will ventilate the heated-and-insulated half of the building. There will be Extract vents in the Shower Room, the Utility Room, and the Plant Room (one in each) &#8211; and Supply vents in the Workshop (three). The Vent-Axia unit is rather less fancy than the PAUL Novus MVHR unit in the House, but should be capable enough for its less demanding role &#8211; especially since any fan noise or inter-room noise transmission is really not an issue. The replacement filters are <em>much<\/em> cheaper than for the more &#8216;advanced&#8217; MVHR units.<\/p>\n\n\n\n<p>These Vent-Axia units are relatively common and several other people have explored the options for integration with home automation &#8216;hub&#8217; applications such as Home Assistant. The manufacturer has also been helpful in publishing documentation that describes the (limited) integration capabilities &#8211; most notably this: <a href=\"https:\/\/github.com\/aelias-eu\/vent-axia-remote\/blob\/main\/docs\/sentinel_kinetic-BMS.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Sentinel Kinetic Range BMS Capabilities<\/a> (PDF). There is no option to (directly) control the unit via a smartphone app.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Integration Options<\/h2>\n\n\n\n<p>In summary, the integration options boil down to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Using the 230V &#8216;Switched Live&#8217; input to trigger a ventilation Boost cycle\n<ul class=\"wp-block-list\">\n<li>This input is intended to be connected to a light switch in a bathroom &#8211; the same as a standalone extractor fan might be connected to a bathroom light<\/li>\n\n\n\n<li>The Switched Live wants to be from the same 230V circuit as supplies the Non-Switched Live &#8211; which would not normally be the case; Vent-Axia offer an <a href=\"https:\/\/www.vent-axia.com\/range\/isolator-relay-controller\" target=\"_blank\" rel=\"noreferrer noopener\">Isolator Relay Controller<\/a> which can address this<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Using a momentary dry-contact input on any one of the SW1 &#8211; SW5 terminals to trigger a ventilation Boost cycle (when the unit is running in Control Mode 1)\n<ul class=\"wp-block-list\">\n<li>These are intended to be connected to momentary wall-switches but can be any input that &#8216;behaves like one of those &#8211; such as a relay driven in a short on-off cycle<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Using a persistent dry-contact input on one of the SW1 &#8211; SW3 terminals to force Low, Normal or Boost ventilation for as long as the input is active (when the unit is running in Control Mode 2)\n<ul class=\"wp-block-list\">\n<li>Typically connected to relays controlled by a BMS or Home Automation system<\/li>\n\n\n\n<li>Terminal SW5 can also force the unit to stop completely &#8211; primarily intended for integration with a fire alarm system<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Using a 0-10V analogue input to emulate a CO<sub>2<\/sub> or Humidity sensor and control the fan speed accordingly\n<ul class=\"wp-block-list\">\n<li>This allows for more fine-grained speed control than the other options &#8211; rather than just the pre-set Normal and Boost speeds<\/li>\n\n\n\n<li>The equivalent input on the PAUL Novus is used to enable Home Assistant to control the fan speed on the House MVHR &#8211; although that is the only available integration mechanism for the Novus<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Using a microcontroller to emulate the Vent-Axia remote keypad, which can select from the Low \/ Normal \/ Boost settings or trigger a timed Boost cycle\n<ul class=\"wp-block-list\">\n<li>See the code for <a href=\"https:\/\/github.com\/ryancdotorg\/vent-axia-bridge\" target=\"_blank\" rel=\"noreferrer noopener\">vent-axia-bridge<\/a> on GitHub, which provides access over WiFi; the accompanying documentation is very limited<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>All of these options (apart from the last one) could be robustly integrated via KNX module(s):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Using a KNX &#8216;switch actuator&#8217; (i.e. a relay bank) module for the relay inputs &#8211; ideally with 4 channels (to cover all the &#8216;Control Mode 2&#8217; SW1-3 and SW5 inputs)\n<ul class=\"wp-block-list\">\n<li>Either a standalone 4-channel module &#8211; with separate terminals for each channel: something like the MDT AKS-0410.03 (Switch Actuator AKS Standard 10 A) or the MDT AKK-0416.03 (Switch Actuator AKK compact)<\/li>\n\n\n\n<li>Or 4 channels of a larger relay bank, which might also provide relay inputs to e.g. the alarm system<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Using a KNX &#8216;analogue input \/ output&#8217; module for the 0-10V input\n<ul class=\"wp-block-list\">\n<li>Either one of the <a href=\"https:\/\/www.mdt.uk\/products\/product-detail\/actuators\/analog-in-\/outputs\/analog-in-\/-output.html\" target=\"_blank\" rel=\"noreferrer noopener\">MDT KNX AIO<\/a> modules should be suitable; about \u00a375 for the 2-channel module<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>The main question is whether there is any real requirement to force the unit out of &#8216;Automatic&#8217; operation &#8211; given that its built-in scheduling options seem reasonably comprehensive. Some owners report that they had multiple (manual) &#8216;Boost&#8217; switches installed but never use them.<\/p>\n\n\n\n<p>As the MVHR unit is being installed in the Plant Room, that&#8217;s the easiest location to retro-fit any of the integration options. Probably best to see how it performs with just its built-in controller before planning to integrate it.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction The Outbuildings are getting a Vent-Axia Lo-Carbon Sentinel Kinetic BH MVHR unit which will ventilate the heated-and-insulated half of the building. There will be Extract vents in the Shower Room, the Utility Room, and the Plant Room (one in &hellip; <a href=\"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?page_id=5936\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":5862,"menu_order":8,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5936","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/5936","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5936"}],"version-history":[{"count":5,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/5936\/revisions"}],"predecessor-version":[{"id":5946,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/5936\/revisions\/5946"}],"up":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/5862"}],"wp:attachment":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}