{"id":3772,"date":"2016-06-22T08:33:00","date_gmt":"2016-06-22T05:33:00","guid":{"rendered":"https:\/\/vallox.com\/jalkilammitys-sahkolla-vai-vedella\/"},"modified":"2026-08-30T14:02:50","modified_gmt":"2026-08-30T11:02:50","slug":"efteruppvarmning-med-el-eller-vatten","status":"publish","type":"post","link":"https:\/\/www.vallox.com\/sv\/efteruppvarmning-med-el-eller-vatten\/","title":{"rendered":"Hur fungerar efterv\u00e4rmningen i ett ventilationsaggregat?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Senast uppdaterad 30.8.2026<\/p>\n\n\n    <div id=\"\" class=\"Block Section overflow-hidden w-full\">\n        <div class=\"Section-content relative max-w-[1088px] mx-auto w-full\">\n            \n\n<div style=\"height:65px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div  class=\"Image w-full h-auto mb-8\">\n    <img decoding=\"async\"\n        srcset=\"\n            https:\/\/www.vallox.com\/app\/uploads\/2023\/06\/Artikkeli_Jalkilammitys_listauskuva_940x628px.jpg 1024w,\n            https:\/\/www.vallox.com\/app\/uploads\/2023\/06\/Artikkeli_Jalkilammitys_listauskuva_940x628px-768x513.jpg 768w,\n            https:\/\/www.vallox.com\/app\/uploads\/2023\/06\/Artikkeli_Jalkilammitys_listauskuva_940x628px-300x200.jpg 300w,\n            https:\/\/www.vallox.com\/app\/uploads\/2023\/06\/Artikkeli_Jalkilammitys_listauskuva_940x628px-150x150.jpg 150w,\n        \"\n        alt=\"j\u00e4lkil\u00e4mmitys_kuvituskuva\"\n        src=\"https:\/\/www.vallox.com\/app\/uploads\/2023\/06\/Artikkeli_Jalkilammitys_listauskuva_940x628px-300x200.jpg\"\n        class=\"object-cover w-full h-auto\"\n    \/>\n    <\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c4ldre ventilationsaggregat har ett separat efterv\u00e4rmningsbatteri eller en vattenburen efterv\u00e4rmningsv\u00e4rmare<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e4r mekanisk ventilation b\u00f6rjade bli vanlig var v\u00e4rme\u00e5tervinningens verkningsgrad i ventilationsaggregaten endast 40\u201350 %, vilket \u00e4r betydligt l\u00e4gre \u00e4n i dagens aggregat. Detta innebar att ventilationsaggregatet inte p\u00e5 egen hand kunde v\u00e4rma tilluften till en tillr\u00e4ckligt h\u00f6g temperatur f\u00f6r bostadsutrymmen. D\u00e4rf\u00f6r utrustades aggregaten med antingen en elektrisk efterv\u00e4rmare eller ett vattenburet efterv\u00e4rmningsbatteri f\u00f6r att v\u00e4rma tilluften. Efterv\u00e4rmning beh\u00f6vdes exempelvis i ventilationsaggregatet Vallox Digit2 SE.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Energikostnaderna f\u00f6r ett vattenburet efterv\u00e4rmningsbatteri var l\u00e5ga, men de h\u00f6gre investerings- och installationskostnaderna kunde s\u00e4llan r\u00e4knas hem inom rimlig tid, s\u00e4rskilt i mindre fastigheter. Elv\u00e4rmning var dessutom en mer drifts\u00e4ker l\u00f6sning. Exempelvis medf\u00f6rde ett str\u00f6mavbrott eller ett haveri i cirkulationspumpen under kalla vinterf\u00f6rh\u00e5llanden ingen risk f\u00f6r skador p\u00e5 den elektriska efterv\u00e4rmaren.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Med hj\u00e4lp av tabellen nedan kan energif\u00f6rbrukningen f\u00f6r efterv\u00e4rmning uppskattas f\u00f6r \u00e4ldre ventilationsaggregat. Ber\u00e4kningen f\u00f6r <strong>Vallox 90<\/strong> \u00e4r \u00e4ven relativt v\u00e4l till\u00e4mplig p\u00e5 andra mindre aggregat med motstr\u00f6msv\u00e4rmev\u00e4xlare utan f\u00f6rv\u00e4rmning. Ber\u00e4kningen f\u00f6r <strong>Vallox Digit2<\/strong> kan p\u00e5 motsvarande s\u00e4tt anv\u00e4ndas f\u00f6r aggregat med korsstr\u00f6msv\u00e4rmev\u00e4xlare, s\u00e5som <strong>MUH Ilmava<\/strong>, <strong>Ilmava 100 och 120<\/strong>, <strong>Ilmava TSK<\/strong>, <strong>Digit S<\/strong>, <strong>Digit SE<\/strong>, <strong>Vallox 75<\/strong>, <strong>95<\/strong>, <strong>130<\/strong> och <strong>132E<\/strong>. Av dessa modeller har endast <strong>Digit2<\/strong> och <strong>Vallox 132<\/strong> f\u00f6rv\u00e4rmning. Ber\u00e4kningen f\u00f6r <strong>Vallox 150<\/strong> kan anv\u00e4ndas f\u00f6r aggregat som \u00e4r utrustade med b\u00e5de f\u00f6rv\u00e4rmning och motstr\u00f6msv\u00e4rmev\u00e4xlare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.vallox.com\/sv\/kalkylator-for-energiforbrukningen-i-ventilation\/\" target=\"_blank\" rel=\"noreferrer noopener\">H\u00e4r kan du ladda ner kalkylatorn som l\u00e5ter dig ber\u00e4kna ditt ventilationsaggregats energif\u00f6rbrukning.<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Moderna ventilationsaggregat beh\u00f6ver ingen separat efterv\u00e4rmning<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alla MyVallox-ventilationsaggregat som s\u00e4ljs idag har en v\u00e4rme\u00e5tervinningsgrad p\u00e5 \u00f6ver 75 %, vilket inneb\u00e4r att aggregatet under st\u00f6rre delen av \u00e5ret kan v\u00e4rma tilluften till \u00f6ver +17 \u00b0C enbart med hj\u00e4lp av v\u00e4rmeenergin i fr\u00e5nluften. D\u00e4rf\u00f6r beh\u00f6vs ingen separat efterv\u00e4rmningsutrustning f\u00f6r tilluften i moderna ventilationsaggregat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vallox CFi-aggregat<\/strong> \u00e4r utrustade med en inbyggd elektrisk efterv\u00e4rmare som anv\u00e4nds vid behov, exempelvis under vinterf\u00f6rh\u00e5llanden n\u00e4r v\u00e4rme\u00e5tervinningen ensam inte r\u00e4cker till f\u00f6r att v\u00e4rma tilluften till \u00f6nskad temperatur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Elektrisk efterv\u00e4rmning och byggnadens E-tal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">De nya energibest\u00e4mmelserna \u201dstraffar\u201d eluppv\u00e4rmning med energikoefficienten 1,7, men efterv\u00e4rmningens energif\u00f6rbrukning och s\u00e5ledes dess inverkan p\u00e5 byggnadens E-tal \u00e4r mycket liten om man anv\u00e4nder sig av korrekta utg\u00e5ngsdata och en f\u00f6rnuftig temperatur p\u00e5 tilluften n\u00e4r E-talet ber\u00e4knas. Ett elektriskt element \u00e4r fortfarande det enda f\u00f6rnuftiga alternativet f\u00f6r sm\u00e5 bostadsventilationsaggregat eftersom avsikten inte \u00e4r att v\u00e4rma bostaden med ventilationsaggregatet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hur anv\u00e4nder man ventilationsaggregatets v\u00e4rme\u00e5tervinning?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Den r\u00e4tta tilluftstemperaturen \u00e4r i h\u00f6g grad en personlig preferens. Tilluftstemperaturen b\u00f6r st\u00e4llas in s\u00e5 l\u00e5gt som m\u00f6jligt utan att det upplevs som dragigt. Tilluftstemperaturen b\u00f6r aldrig st\u00e4llas h\u00f6gre \u00e4n rumstemperaturen, eftersom det inte \u00e4r energieffektivt att f\u00f6rs\u00f6ka v\u00e4rma bostaden med ventilationsaggregatet. I praktiken \u00e4r en tilluftstemperatur p\u00e5 cirka <strong>16-18 \u00b0C<\/strong> ofta l\u00e4mplig ur b\u00e5de energieffektivitets- och komfortsynpunkt, eftersom ventilationen d\u00e5 fungerar korrekt utan att orsaka drag.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Moderna Vallox-ventilationsaggregat har automatiserad v\u00e4rme\u00e5tervinning. Aggregaten m\u00e4ter lufttemperaturen och reglerar v\u00e4rme\u00e5tervinningen automatiskt. Det finns inte l\u00e4ngre n\u00e5got behov av att manuellt v\u00e4xla mellan sommar- och vinterdrift, eftersom aggregatet automatiskt bypassar v\u00e4rme\u00e5tervinningen n\u00e4r uteluften \u00e4r varmare \u00e4n den inst\u00e4llda tilluftstemperaturen. Aggregatet kan \u00e4ven ta tillvara svalkan under sommarn\u00e4tter n\u00e4r kylfunktionen \u00e4r aktiverad och utomhustemperaturen \u00e4r l\u00e4gre \u00e4n den inst\u00e4llda temperaturgr\u00e4nsen. Den valda temperaturinst\u00e4llningen kan kontrolleras och vid behov \u00e4ndras via MyVallox-styrenheten eller i MyVallox Home.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Om luften som kommer fr\u00e5n ventilen k\u00e4nns obehagligt kall (r\u00f6rlig luft med en temperatur under 37 \u00b0C upplevs alltid som sval mot huden n\u00e4ra ventilen) b\u00f6r b\u00e5de temperaturen p\u00e5 luften som l\u00e4mnar aggregatet och temperaturen p\u00e5 luften som kommer ut ur tilluftsventilen m\u00e4tas. Om luften kyls ned flera grader i kanalsystemet \u00e4r kanalisoleringen sannolikt otillr\u00e4cklig. \u00c4ven luftfl\u00f6dets riktning fr\u00e5n ventilerna, f\u00f6nstrens egenskaper och uppv\u00e4rmningssystemet kan p\u00e5verka upplevelsen av drag.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ventilationskanalernas inverkan p\u00e5 v\u00e4rme\u00e5tervinningens energieffektivitet<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kanalernas placering har betydelse f\u00f6r v\u00e4rme\u00e5tervinningens effektivitet. Om kanalerna \u00e4r dragna p\u00e5 byggnadens varma sida, till exempel inkapslade vid taket, v\u00e4rms tilluften upp n\u00e5got p\u00e5 v\u00e4gen genom byggnaden tack vare interna v\u00e4rmef\u00f6rluster. Detta kan f\u00f6rb\u00e4ttra boendekomforten utan n\u00e5gon extra energianv\u00e4ndning. S\u00e4rskilt i t\u00e4ta och energieffektiva byggnader b\u00f6r man dock undvika on\u00f6dig uppv\u00e4rmning av tilluften, eftersom \u00f6vertemperaturer kan bli ett problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Om fr\u00e5nluften d\u00e4remot kyls ned i otillr\u00e4ckligt isolerade kanaler som \u00e4r placerade p\u00e5 vinden f\u00f6rs\u00e4mras ventilationsaggregatets energieffektivitet, eftersom luften som n\u00e5r v\u00e4rme\u00e5tervinningsv\u00e4xlaren \u00e4r kallare. Om fr\u00e5nluften kyls ned med i genomsnitt en grad p\u00e5 v\u00e4gen fr\u00e5n fr\u00e5nluftsventilen till ventilationsaggregatet minskar aggregatets \u00e5rliga verkningsgrad med n\u00e4stan fyra procentenheter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e4r kanalerna installeras p\u00e5 den varma sidan av \u00e5ngsp\u00e4rren fungerar v\u00e4rme\u00e5tervinningen effektivt, och tilluftens temperatur vid ventilen kan till och med vara h\u00f6gre \u00e4n n\u00e4r luften l\u00e4mnade ventilationsaggregatet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Efterv\u00e4rmeelementets faktiska energif\u00f6rbrukning<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nedanst\u00e5ende tabell visar energif\u00f6rbrukningen f\u00f6r efterv\u00e4rmningen i olika ventilationsaggregat vid olika luftstr\u00f6mmar och tilluftstemperaturer. Kalkylen f\u00f6r Vallox 90 g\u00e4ller mycket bra \u00e4ven f\u00f6r andra mindre aggregat med korsmotstr\u00f6msplattv\u00e4rmev\u00e4xlare som <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-tsk-multi-50\/\" target=\"_blank\" rel=\"noreferrer noopener\">TSK Multi 50<\/a> och <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-tsk-multi-80\/\" target=\"_blank\" rel=\"noreferrer noopener\">80<\/a>, <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-096-mv\/\" target=\"_blank\" rel=\"noreferrer noopener\">096<\/a>, <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-121-se\/\" target=\"_blank\" rel=\"noreferrer noopener\">121<\/a>, <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-110-mv\/\" target=\"_blank\" rel=\"noreferrer noopener\">110<\/a> och <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-145-mv\/\" target=\"_blank\" rel=\"noreferrer noopener\">145<\/a>. Kalkylen f\u00f6r Digit 2 kan p\u00e5 motsvarande s\u00e4tt anv\u00e4ndas f\u00f6r att bed\u00f6ma energif\u00f6rbrukningen i modellerna Vallox 75, 95 och 132 E. Kalkylen f\u00f6r Vallox 150 kan \u00e4ven anv\u00e4ndas f\u00f6r st\u00f6rre aggregat som <a href=\"https:\/\/www.vallox.com\/sv\/produkt\/vallox-245-mv\/\" target=\"_blank\" rel=\"noreferrer noopener\">Vallox 245<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/res.cloudinary.com\/vallox\/image\/upload\/v1694436861\/FileStock\/AttachmentsForWeb\/JalkilammitysSahkollaVaiVedella_FIN_ENG_SWE.pdf\">Efterv\u00e4rmeelementets energif\u00f6rbruknin<\/a><a href=\"https:\/\/res.cloudinary.com\/vallox\/image\/upload\/v1694436861\/FileStock\/AttachmentsForWeb\/JalkilammitysSahkollaVaiVedella_FIN_ENG_SWE.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">g<\/a><\/p>\n\n\n    <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Senast uppdaterad 30.8.2026<\/p>\n","protected":false},"author":5,"featured_media":4292,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[238],"tags":[256],"class_list":["post-3772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-artikkelit-sv","tag-ammattilaisille-sv"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hur fungerar efterv\u00e4rmningen i ett ventilationsaggregat? 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