{"id":848,"date":"2011-02-15T15:16:39","date_gmt":"2011-02-15T05:16:39","guid":{"rendered":"http:\/\/blog.dbohs.com\/?p=848"},"modified":"2015-12-17T12:18:21","modified_gmt":"2015-12-17T02:18:21","slug":"radiation-vs-fields","status":"publish","type":"post","link":"https:\/\/blog.dbohs.com\/?p=848","title":{"rendered":"Radiation vs Fields with underfloor heating"},"content":{"rendered":"<p>I am planning a bathroom renovation and thought than underfloor heating in winter would be nice.<\/p>\n<p>I found two local websites for underfloor heating and both claim to have &#8220;no EMR&#8221;. This would be expected, even with a design optimised to radiate at 50 Hz,<!--more--> as the size of the antenna is limited by the size of the bathroom.<\/p>\n<p style=\"text-align: center;\">\n<p>Like suburban power lines, the underfloor heating elements would not produce much radiation at all. A claim to protect against dragons and flying pigs would be equally relevant.<\/p>\n<p>Electromagnetic fields are another matter. The current through the heater produces the magnetic field, and for a 250W heater this is about 1 A, a relatively small current. The electric field strength relates to the voltage (240 V) and would be attenuated by the floor covering, particularly when it is moist or wet.<\/p>\n<p>Its surprising how many times people get confused between electromagnetic radiation and electromagnetic fields.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Claims that underfloor heating produce no electrmagnetic radiation are spurious, as there is no appreciable radiation with an antenna the size of a room. Electromagnetic fields &#8211; electric and magnetic are another matter, but it is likely only magnetic fields at 50Hz would be an issue.<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[23],"tags":[157,155,154,156,153,158],"class_list":{"0":"post-848","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-radiation","7":"tag-electric-fields","8":"tag-electromagnetic-felids","9":"tag-emr","10":"tag-magneric-feidks","11":"tag-readiatio","12":"tag-under-floor-heating","13":"czr-hentry"},"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/posts\/848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=848"}],"version-history":[{"count":11,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/posts\/848\/revisions"}],"predecessor-version":[{"id":1281,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=\/wp\/v2\/posts\/848\/revisions\/1281"}],"wp:attachment":[{"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.dbohs.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}