{"id":979,"date":"2025-03-17T11:06:37","date_gmt":"2025-03-17T10:06:37","guid":{"rendered":"https:\/\/invar.nl\/?p=979"},"modified":"2025-03-17T17:00:38","modified_gmt":"2025-03-17T16:00:38","slug":"dehumidifier","status":"publish","type":"post","link":"https:\/\/invar.nl\/?p=979","title":{"rendered":"Dehumidifier"},"content":{"rendered":"\n<p>Thinking about my room&#8217;s ventilation and air quality again.<\/p>\n\n\n\n<p>Goals:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keep humidity low. I have way too many plants that are evaporating so much water that my room is always humid.<\/li>\n\n\n\n<li>Filter air (e.g. dust, mould spores)<\/li>\n\n\n\n<li>Keep CO2 low<\/li>\n\n\n\n<li>Keep room cool-ish in summer<\/li>\n<\/ul>\n\n\n\n<p>Previously I looked at CR boxes and heat recovery ventilation. Now I&#8217;m thinking about some type of air conditioning \/ dehumidifier:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Box with filters and AC components<\/li>\n\n\n\n<li>Window duct connect box to outside through a panel in front of a window<\/li>\n\n\n\n<li>Room duct connecting the outflow of the box to the other side of the room<\/li>\n\n\n\n<li>Input valve to select if taking air from outside (window duct) or inside (intake directly on the box)<\/li>\n\n\n\n<li>Evaporator coil with separate fans always blows air from filters to inside (room duct)<\/li>\n\n\n\n<li>Condenser coil with separate fans blows from filters to inside in winter (room duct), outside in summer (window duct)<\/li>\n\n\n\n<li>Bypass channel with separate fans blow air only through filters into room duct<\/li>\n<\/ul>\n\n\n\n<p>Modes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Filter mode: \n<ul class=\"wp-block-list\">\n<li>box intake -&gt; filters -&gt; bypass fans -&gt; room duct<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Ventilation mode: \n<ul class=\"wp-block-list\">\n<li>window duct -&gt; filters -&gt; bypass fans -&gt; room duct<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Dehumidifier mode: \n<ul class=\"wp-block-list\">\n<li>box intake -&gt; filters -&gt; evaporator fans -&gt; room duct<\/li>\n\n\n\n<li>box intake -&gt; filters -&gt; condenser fans -&gt; room duct<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>AC mode:\n<ul class=\"wp-block-list\">\n<li>box intake -&gt; filters -&gt; evaporator fans -&gt; room duct<\/li>\n\n\n\n<li>box intake -&gt; filters -&gt; condenser fans -&gt; window duct<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Then sensors select mode &amp; fan speeds &amp; compressor power, based on humidity, CO2 level and inside &amp; outside temperature. I would like a variable compressor for more quiet and efficient operation. Not sure ow to set up the valves, maybe include backdraft dampers to prevent crossflow between modes.. <\/p>\n\n\n\n<p>Or maybe I should do away with the AC option, and just have a separate dehumidifier &amp; ventilation box. It would need double the filters but no valves. Perhaps I could use a cheap <a href=\"https:\/\/www.praxis.nl\/verwarmingen-airco-s\/luchtbehandeling\/ontvochtigers-luchtreinigers-luchtbevochtigers\/ontvochtigers\/ontvochtigers-voor-thuis\/pro-breeze-omnidry-luchtontvochtiger-12l-dag-automatische-vochtigheidssensor-wasdroogfunctie\/10462076\">12L\/day dehumidifier<\/a> as-is, attached with its fan intake to a CR box. If that&#8217;s too loud, replace the fan with P14s. Then a separate ventilation box with its own filters that takes in outdoor air. Or I guess I could house the filters and fans in the same box, but the air flows would be separate.<br><em>Edit: dehumidifiers typically push warm air out the back, not the front, so directly attaching to a CR box is slightly harder than I thought especially if I want to keep the original controls accessible. So I&#8217;ve swapped my link for one that takes air in from the back.<\/em><\/p>\n\n\n\n<p>I really should think about minimum viable product and optimise for getting it done instead of trying to design the perfect solution and never finishing it.<\/p>\n\n\n\n<p>To be continued..<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thinking about my room&#8217;s ventilation and air quality again. Goals: Previously I looked at CR boxes and heat recovery ventilation. Now I&#8217;m thinking about some type of air conditioning \/ dehumidifier: Modes: Then sensors select mode &amp; fan speeds &amp; compressor power, based on humidity, CO2 level and inside &amp; outside temperature. I would like [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,57],"tags":[],"class_list":["post-979","post","type-post","status-publish","format-standard","hentry","category-furniture","category-ventilation-air-quality"],"_links":{"self":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=979"}],"version-history":[{"count":5,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/979\/revisions"}],"predecessor-version":[{"id":981,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/979\/revisions\/981"}],"wp:attachment":[{"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}