![](\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2021\/09\/Scheuerlein-ebm-papst-260x723.jpg\")
J\u00f6rg Scheuer\u00adlein, Engi\u00adneer Heating Mechanics at ebm-papst in Land\u00adshut. (Photo | ebm-papst)<\/p><\/div><\/div>\n
Some\u00adtimes, units are like zombies and they live on after they have been killed off. The majority of people, for example, still think of horse\u00adpower when they buy a car or of calo\u00adries when it comes to a diet\u200a\u2014\u200arather than using the modern units of watts or joules respec\u00adtively. The same applies to the thermal unit. In the majority of Euro\u00adpean coun\u00adtries, spec\u00adi\u00adfying the thermal unit is based on an old defi\u00adn\u00adi\u00adtion of how much heat energy you can obtain from one cubic meter of natural gas. In Europe, the refer\u00adence gas G20 has 34.02 MJ\/m\u00b3. This is the Euro\u00adpean thermal unit Hi. Heating systems are now consid\u00ader\u00adably more effi\u00adcient. The outdated defi\u00adn\u00adi\u00adtion of the thermal unit remained, however.<\/p>\n
In the USA, on the other hand, the heat energy that can be obtained from the refer\u00adence gas G20 is justi\u00adfi\u00adably defined with a higher value, namely 37.76 MJ\/m\u00b3. This is the US thermal unit Hs. Now, the USA is well known for having issues with the metric system. This is why they use their own unit for heat output\u200a\u2014\u200awhich you cannot calcu\u00adlate without the thermal unit. The unit the Amer\u00adi\u00adcans use is the BTU\/h (British Thermal Unit per hour, which despite its name is only used in the USA, and not in the United Kingdom). This is why you get a higher kW value in the USA compared to in Europe when converting the heat output from BTU\/h into kilo\u00adwatts\u200a\u2014\u200abecause the defi\u00adn\u00adi\u00adtion of the thermal unit is higher in the USA. By the way, in the Nether\u00adlands, they use the more real\u00adistic Amer\u00adican thermal unit Hs, but specify the output in kilo\u00adwatts.<\/p>\n
China uses yet another system<\/h2>\n
In China there is a partic\u00adular heat output zombie: the steam ton\/hour. This is based on the old coal stoves in the cellar which directly produced steam for the radi\u00ada\u00adtors. The quan\u00adtity of steam per hour resulted in a certain heat output in people\u2019s homes. Even today, the heat output in steam ton\/hour is still required for large plants in China. There is, however, no method for precisely converting it into kW. Using prac\u00adtical compar\u00adisons, ebm-papst has come to a useful equiv\u00ada\u00adlent of 635 kW (Hi) \u2259 1\u2009t steam\/h.<\/p>\n
So do not be surprised if you encounter some confu\u00adsion when it comes to the units and values used to denote heat output\u200a\u2014\u200ait is all down to how it is defined.\u2002<\/p>\n","protected":false},"excerpt":{"rendered":"
Again and again, you get customers from the USA asking about a blower from a Euro\u00adpean catalog. Later on, they are surprised because the blower is suddenly designed for a higher heat output (kilo\u00adwatts) than is stated in the catalog. Why is that? Some\u00adtimes, units are like zombies and they live on after they have [\u2026]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[8,4],"tags":[],"class_list":["post-15425","post","type-post","status-publish","format-standard","hentry","category-heating","category-insights"],"acf":[],"_links":{"self":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/comments?post=15425"}],"version-history":[{"count":7,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15425\/revisions"}],"predecessor-version":[{"id":15685,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15425\/revisions\/15685"}],"wp:attachment":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/media?parent=15425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/categories?post=15425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/tags?post=15425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}