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HAV Warehouse has one goal, to

make the best ductwork in the world. 

Manufacturers of pre-insulated and traditional ductwork

Havwar are specialists in the manufacture of Koolduct ®, Strongduct pre-insulated duct systems, Firemac duct systems,
and galvanised steel ducts.

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Strongduct Pre-Insulated Systems

Havwar are the UK's licensed manufacturer of the patented Strongduct pre-insulated steel ducting systems. These systems comprise of 4 products -


Koolduct Pre-Insulated systems

Havwar is an accredited Koolduct delivery partner, with over a decade of experience in manufacturing Koolduct.   

One of the more popular Koolduct products Havwar sells are grille boxes and FCU plenum boxes as they are lightweight and 100 % vapour sealed insulation. 


Firemac Fire Rated ductwork


Havwar is an accredited manufacturer of Firemac Fire-rated ductwork, and a distributor of all related ancillaries. For over 30 years Firemac has perfected the manufacture of woven glass fibre wrapped ducts.  Through the techniques developed of covering the ducts in the glass fibre it allows for ducts of any shape and size (rectangular, circular or oval) to be fire rated, unlike other solutions, lower gauge steel can be used in the manufacture of these ducts which makes them lighter but extremely durable to high temperatures they need to operate in.  The Firemac system has been tested to BS 476: Part 24: 1987 (ISO 69441985) and to EN 1366-Parts 1, 8, 9

Who We Are

About Our Company

Established in 2013 Heating and Ventilation Warehouse (Havwar) combined over 100 years of experience in sheet metal duct fabrication and applied it to new innovative fields of ductwork manufacture specialising in pre-insulated duct manufacture which utilises state-of-the-art CNC machinery.


Year of Establishment


Projects Completed


Business Partners

Our Services

We Offer a Range of Products to Meet Your Needs

Havwar manufacture a wide selection of ducting products, in all shapes, sizes, and finishes. We have every type of duct product you could need, all under one roof.





100% insulation vapour seal

Time saving Installations

Demountable Ductwork

Traditional Steel Ductwork

Fire Rated


Bespoke Fabrications

What We do

Our Projects

Take a look at some of our projects and see for yourself the types of products we specialise in. 

Our Customers

Come join the growing list of companies that have experienced the quality of our innovations

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