{"id":4567,"date":"2026-09-01T23:52:54","date_gmt":"2026-09-02T06:52:54","guid":{"rendered":"https:\/\/www.26yc.com\/laboratory-exhaust-heat-recovery\/"},"modified":"2026-10-09T17:56:59","modified_gmt":"2026-10-10T00:56:59","slug":"laboratory-exhaust-heat-recovery","status":"publish","type":"post","link":"https:\/\/www.26yc.com\/de\/laboratory-exhaust-heat-recovery\/","title":{"rendered":"Fume Hood Exhaust Recovery: Wheels vs Plates"},"content":{"rendered":"<p>Laboratories exhaust enormous volumes of conditioned air through fume hoods, often around the clock. Recovering the energy in that exhaust before it leaves the building is one of the fastest-payback upgrades in laboratory HVAC &mdash; and the choice between a rotary wheel and a plate exchanger decides how much you actually save.<\/p>\n<h2>Why labs bleed energy<\/h2>\n<p>Most fume hoods run on 100% outdoor air. A single variable-air-volume hood can move 300&ndash;1,200 m&sup3;\/h, and a typical lab runs dozens of them. Every cubic metre is heated or cooled, then dumped outside. The make-up air system must condition an equal volume to replace it &mdash; that is the real cost.<\/p>\n<ul>\n<li><strong>Constant volume:<\/strong> hoods exhaust at a fixed rate regardless of sash position.<\/li>\n<li><strong>Variable air volume (VAV):<\/strong> flow follows the sash, but peak demand is still high.<\/li>\n<li><strong>Make-up air:<\/strong> all of it must be tempered to ~21&nbsp;&deg;C and 50% RH before entering the space.<\/li>\n<\/ul>\n<h2>Rotary wheel vs plate for fume-hood make-up air<\/h2>\n<p>Both recover heat from the relief airstream and return it to the incoming outdoor air. They differ in what they recover and how they isolate the two airstreams.<\/p>\n<table>\n<thead>\n<tr>\n<th>Factor<\/th>\n<th>Enthalpy rotary wheel<\/th>\n<th>Air-to-air plate<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Recovery type<\/td>\n<td>Total (temperature + humidity)<\/td>\n<td>Sensible only<\/td>\n<\/tr>\n<tr>\n<td>Typical effectiveness<\/td>\n<td>70&ndash;85%<\/td>\n<td>60&ndash;75%<\/td>\n<\/tr>\n<tr>\n<td>Moving parts<\/td>\n<td>Yes (slow rotation, purge sector)<\/td>\n<td>None<\/td>\n<\/tr>\n<tr>\n<td>Air-stream isolation<\/td>\n<td>Good with purge + exhaust-to-outdoor leg<\/td>\n<td>Excellent (separate plates)<\/td>\n<\/tr>\n<tr>\n<td>Best fit<\/td>\n<td>Humid climates, tight energy codes<\/td>\n<td>Strict separation, low maintenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For most labs an <a href=\"https:\/\/www.26yc.com\/de\/heat-recovery\/\">enthalpy wheel with a purge section<\/a> recovers both temperature and humidity, which matters where outdoor summers are humid. A <a href=\"https:\/\/www.26yc.com\/de\/heat-exchanger\/\">plate exchanger<\/a> is preferred when the specification demands the cleanest possible separation between exhaust and supply.<\/p>\n<h2>Integrating with make-up air<\/h2>\n<ul>\n<li>Place the recovery core in the outdoor-air and relief paths of the AHU.<\/li>\n<li>Let the building management system modulate bypass and frost protection.<\/li>\n<li>Size using our <a href=\"https:\/\/www.26yc.com\/de\/plate-heat-exchangers-guide-en\/\">plate heat exchanger sizing guide<\/a> as a starting point.<\/li>\n<\/ul>\n<div style=\"background:#f0f4fa;border-left:4px solid #235294;padding:18px 20px;border-radius:8px;margin:24px 0\">\n<h3 style=\"margin:0 0 8px\">Specifying recovery for a lab fit-out?<\/h3>\n<p style=\"margin:0 0 14px\">EN159 builds plate, rotary, heat-pipe and counterflow air-to-air exchangers for new and retrofit laboratory make-up air systems. Send us airflow (m&sup3;\/h), inlet temperatures and available footprint and we will size it.<\/p>\n<p><a href=\"https:\/\/www.26yc.com\/de\/contact-us\/\" style=\"display:inline-block;background:#235294;color:#fff;padding:10px 20px;border-radius:6px;font-weight:700;text-decoration:none\">Angebot anfordern<\/a>\n<\/div>\n<h2>Related reading<\/h2>\n<p>\n<a href=\"https:\/\/www.26yc.com\/de\/commercial-kitchen-heat-recovery\/\">Commercial Kitchen Heat Recovery<\/a> &middot;<br \/>\n<a href=\"https:\/\/www.26yc.com\/de\/heat-recovery\/\">Heat Recovery Units<\/a> &middot;<br \/>\n<a href=\"https:\/\/www.26yc.com\/de\/plate-heat-exchangers-guide-en\/\">Plate Heat Exchanger Guide<\/a>\n<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong>Why recover energy from fume hood exhaust?<\/strong><br \/>Labs run hoods on 100 percent outdoor air around the clock, so every cubic metre conditioned and then dumped carries a large heating or cooling cost. Recovery captures that energy in the make-up air.<\/p>\n<p><strong>Rotary wheel or plate exchanger for labs?<\/strong><br \/>Rotary wheels give higher effectiveness for large volumes but carry a little exhaust into supply air; plates keep the streams fully separate, which many lab specs prefer for safety, at slightly lower effectiveness.<\/p>\n<p><strong>How much air do fume hoods move?<\/strong><br \/>A single variable-air-volume hood can move several hundred to over a thousand cubic metres per hour, and a typical lab runs many of them, which is why recovery payback is fast.<\/p>\n<p><strong>What about contamination risk?<\/strong><br \/>Where toxic or hazardous exhaust cannot be allowed into supply air, a plate exchanger or a run-around coil keeps the streams separate while still recovering heat.<\/p>\n<div class=\"yc-related\">\n<h3>Verwandte Artikel<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.26yc.com\/de\/run-around-coil-design-guide\/\" title=\"Run-Around Coil Systems: Design Rules for Separate Airstreams\">Run-Around Coil Systems: Design Rules for Separate Airstreams<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/de\/heat-recovery-food-agriculture-drying-en\/\" title=\"Waste Heat Recovery in Food and Agriculture Drying: Why Plate Exchangers Win\">Waste Heat Recovery in Food and Agriculture Drying: Why Plate Exchangers Win<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Laboratories exhaust enormous volumes of conditioned air through fume hoods, often around the clock. Recovering the energy in that exhaust before it leaves the building is one of the fastest-payback upgrades in laboratory HVAC &mdash; and the choice between a rotary wheel and a plate exchanger decides how much you actually save. Why labs bleed [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72],"tags":[162,175,190],"class_list":["post-4567","post","type-post","status-publish","format-standard","hentry","category-heat-recovery","tag-heat-recovery","tag-plate-heat-exchanger","tag-rotary-wheel"],"_links":{"self":[{"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/posts\/4567","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/comments?post=4567"}],"version-history":[{"count":3,"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/posts\/4567\/revisions"}],"predecessor-version":[{"id":5284,"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/posts\/4567\/revisions\/5284"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/media?parent=4567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/categories?post=4567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.26yc.com\/de\/wp-json\/wp\/v2\/tags?post=4567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}