{"id":1340,"date":"2026-04-21T19:58:38","date_gmt":"2026-04-21T17:58:38","guid":{"rendered":"https:\/\/sit-sanitaertechnik.de\/electronic-instantaneous-water-heater-for-apartment-buildings-advantages-and-limitations\/"},"modified":"2026-04-21T19:58:38","modified_gmt":"2026-04-21T17:58:38","slug":"electronic-instantaneous-water-heater-for-apartment-buildings-advantages-and-limitations","status":"publish","type":"post","link":"https:\/\/sit-sanitaertechnik.de\/en\/electronic-instantaneous-water-heater-for-apartment-buildings-advantages-and-limitations\/","title":{"rendered":"Electronic instantaneous water heater for apartment buildings: advantages and limitations"},"content":{"rendered":"\n<p>The electronic instantaneous water heater has a firm place in the field of decentralized hot water supply. For apartment buildings, it can be an interesting alternative to centralized supply, but only if the framework conditions are right. This article soberly classifies the advantages and limitations of this solution.  <\/p>\n\n<h2 class=\"wp-block-heading\">Decentralized hot water supply: the basic principle<\/h2>\n\n<p>With decentralized hot water supply, the water is not heated and distributed centrally for the entire building, but heated locally at the tapping point. An electronic instantaneous water heater is the typical appliance for this purpose. It heats the water directly when the tap is opened and switches off again immediately when the water stops flowing.  <\/p>\n\n<p>The advantage over a centralized system: no long hot water circulation pipes, no energy loss due to heat loss in the pipe, no hygiene problems due to stagnant water in long pipe sections. The decentralized solution is an objective argument, especially when it comes to legionella. Technical details on suitable appliances can be found on the <a href=\"\/?portfolio_entries=warmwassergeraete\" title=\"Hot water appliances from S.I.T. Sanit&#xE4;rtechnik\">product pages for hot water appliances at S.I.T. Sanit\u00e4rtechnik<\/a>.  <\/p>\n\n<h2 class=\"wp-block-heading\">Advantages in apartment buildings<\/h2>\n\n<p>In apartment buildings, decentralized supply can bring economic benefits, especially if the individual apartments are to be billed separately. Each tenant only consumes the hot water that they actually use and can track this directly via the electricity meter. No communal apportionment, no discussions about consumption allocation.  <\/p>\n\n<p>In addition, there is no need for the maintenance and operation of a central hot water system. No storage tank, no circulation pump, no central pressure maintenance systems. This can reduce operating costs for the owner if the installation in a new build or renovation is designed for decentralized supply from the outset.  <\/p>\n<blockquote><p><a title=\"Request further information now.\" href=\"https:\/\/sit-sanitaertechnik.de\/en\/kontakt\/\">Get more information now.<\/a><\/p><\/blockquote>\n\n<h2 class=\"wp-block-heading\">Limits and planning information<\/h2>\n\n<p>Electronic instantaneous water heaters require sufficient electrical connected load. Depending on the appliance and tap volume, 3.5 to over 18 kW are required. In old buildings with weak electrical installations, this can lead to a bottleneck that requires costly conversion work on the power distribution board. This point should be checked before any planning.   <\/p>\n\n<p>In addition, the electronic instantaneous water heater is not equally suitable for all taps. For showers and bathtubs with high volume requirements, the required connected loads are often not economical or technically feasible. The most sensible locations are hand basins, kitchen sinks and sinks.  <\/p>\n\n<h2 class=\"wp-block-heading\">Conclusion: Electronic instantaneous water heater in an apartment building with planning<\/h2>\n\n<p>The electronic instantaneous water heater is a sensible option for kitchens, bathroom hand basins and ancillary rooms in apartment buildings if the electrical connected load is available and decentralized billing is desired. It reaches its limits for large tap volumes. S.I.T. Sanit\u00e4rtechnik will support you in your product selection. <a href=\"https:\/\/sit-sanitaertechnik.de\/en\/kontakt\/\" title=\"Hot water consulting S.I.T. Sanitary technology\">Please feel free to contact us<\/a>.  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The electronic instantaneous water heater has a firm place in the field of decentralized hot water supply. For apartment buildings, it can be an interesting alternative to centralized supply, but only if the framework conditions are right. This article soberly classifies the advantages and limitations of this solution. Decentralized hot water supply: the basic principle [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":792,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72],"tags":[],"class_list":["post-1340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/posts\/1340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/comments?post=1340"}],"version-history":[{"count":1,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/posts\/1340\/revisions"}],"predecessor-version":[{"id":1342,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/posts\/1340\/revisions\/1342"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/media\/792"}],"wp:attachment":[{"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/media?parent=1340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/categories?post=1340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sit-sanitaertechnik.de\/en\/wp-json\/wp\/v2\/tags?post=1340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}