Perimeter Casing
Warmline Trench Heating
Fan Coil Casings
Fan Assisted Convectors
Spirally Wound All Steel Gilled Tube


Sill-Line Perimeter Heating Limited is one of the UK’s leading manufacturers of specialist natural convection heating products (incl. Vectair fan assisted convectors) for all types of commercial and domestic buildings. You can find our products in airports, libraries, factories, showrooms, schools, nursing homes, offices, bespoke houses and even on an aeroplane. We also specialise in the design and manufacture of spiral wound tubing and architectural casings to enclose fan coil air conditioning units. Our engineering department have been producing aluminium louvres for fashion outlets and other designer shops for a number of years, an application for which we are seeing an increased demand. 

Trench Heating made in the UK

Operating from premises in Daventry Northamptonshire, we manufacture all of our items including the heat exchanger, grille and casing. Our small team of project managers and engineers have a wealth of experience built up over many years. We are particularly proud of our industry leading flexible grille. This is made from solid nylon rods to SAM 66 and aluminium blades anodized to AA15 which is far superior to rival methods of grille manufacture. It is not the cheapest way to make a grille, but it is the best. Major projects have included the Aviva International Rugby Football Stadium in Dublin, Gatwick Airport Terminal Link Bridge and St Georges Wharf Vauxhall, London Havant County Council New Offices & Bank of America’s new offices at Canary Wharf. If you are looking for the best quality, made in the UK, convection heating for your project then get in touch. 


If you have a more general engineering requirement

Visit the Sill-Line Engineering web site.

Sill Line – Where Special is Standard