{"id":6891,"date":"2025-11-16T18:00:00","date_gmt":"2025-11-16T18:00:00","guid":{"rendered":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?p=6891"},"modified":"2025-11-16T20:58:41","modified_gmt":"2025-11-16T20:58:41","slug":"mvhr-rigid-ventilation-duct-supports","status":"publish","type":"post","link":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?p=6891","title":{"rendered":"MVHR Rigid Ventilation Duct Supports"},"content":{"rendered":"\n

I decided to install the MVHR system myself, since most builders still don’t seem very familiar with the technology and while some aspects are a bit fiddly none of the work is difficult. As the building is not considered a “Dwelling”, Building Control aren’t concerned about the certification of the ventilation installation – whereas they would be in a House.<\/p>\n\n\n\n

Overall I’ve been pretty happy with the MVHR installation ancillaries supplied by BPC Ventilation<\/a> to complement the Vent-Axia MVHR unit, but there was nothing specific included in the kit to support the 125mm diameter rigid(-ish) ventilation ducts. There was a reel of ‘builders band’ included in the kit which worked well to strap down the small diameter semi-rigid ducts above the ceiling but there wasn’t much of that left – and I don’t consider it a good solution for the larger diameter rigid ducts anyway.<\/p>\n\n\n\n

Some suppliers want a lot of money for duct support brackets but Direct Channel Support Systems<\/a>, who I used for the cable baskets, offer a nice range of pipe \/ duct support brackets<\/a> at very reasonable prices. 5 of the 125mm duct brackets, 4 support brackets and a 2m length of M8 threaded rod were only \u00a310.35.<\/p>\n\n\n\n

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Two of the duct support brackets securely holding the long run of horizontal duct<\/figcaption><\/figure>\n\n\n\n

The range of brackets from Direct Channel includes ‘double’ brackets which allow one duct to be supported directly above another one, which must be quite a common requirement.<\/p>\n\n\n\n

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Wider shot of the MVHR unit and ductwork, showing a ‘Double’ bracket mounted directly above a ‘Single’ bracket for the external ducts.
The ‘tinfoil’ sections are silencers covered with foil-backed fibreglass insulation, which help to stop fan noise propagating to the room vents.<\/figcaption><\/figure>\n\n\n\n

Temporarily, there’s just black insulation tape holding the lengths of ducting to their fittings but now all of the rigid ducting has been dry-fitted that needs to be replaced with duct sealant and aluminium tape (both supplied in the BPC kit).<\/p>\n\n\n\n

Once all the duct joints have been sealed, the two ‘outdoor’ ducts need insulating (foil-backed fibreglass insulation was also supplied in the kit) since they will both be carrying air at ‘outdoor’ temperatures through a heated space, making them prone to condensation – as well as heat loss.<\/p>\n","protected":false},"excerpt":{"rendered":"

I decided to install the MVHR system myself, since most builders still don’t seem very familiar with the technology and while some aspects are a bit fiddly none of the work is difficult. As the building is not considered a … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,94,60],"tags":[],"class_list":["post-6891","post","type-post","status-publish","format-standard","hentry","category-build-progress","category-outbuildings","category-ventilation-ducts"],"_links":{"self":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6891"}],"version-history":[{"count":2,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6891\/revisions"}],"predecessor-version":[{"id":6897,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6891\/revisions\/6897"}],"wp:attachment":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}