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Thermo HS

Thermo HS
Thermo HS lift & slide door


Engineered (laminated) timber profiles

Pine or Oak timber

Upgrade to PAS24 available upon request

Aluminium cladding available on most types

Factory applied paint or stain

Siegenia lift & slide fittings

Locking vent position

Factory fitted 28mm double-glazing or 36mm triple-glazing

Internally beaded by secret nailing

Overall U-value of approx 1.25/m2K (double) or approx 0.98W/m2K (triple)

Aluminium threshold for part M compliance

10 Year Guarantee*

The Thermo HS range of lift & slide doors is Olsen's best selling range of sliding doors. Offering excellent performances along with a large range of flexibility in design and features the Thermo HS range is vastly used for domestic and commercial purposes. 



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The lift & slide action of this door is operated by the door handle. When closed (handle pointing up) the door is lowered a few millimeters which compresses the weather-seals, and engages the door into 2 locking points around the frame, for high security and weatherproofing.


By turning the handle into the down position, the whole sliding leaf is raised up a few millimeters, releasing the seals and enabling the door to be slid effortlessly along the track.  


An internal cylinder lock provides added security. There is a secure ventilation position, and the door can also be lowered at any point along its track to prevent it from moving whilst open by utilising its own weight.

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In most cases Thermo HS doors are supplied with the glass units temporary beaded into the frame for safe transport, due to weight and handling purposes. The glass is then removed from the frame once at site which makes maneuvering the door around site much easier. Once the door is positioned and fixed into place, the glass units are then placed in the frame and then the glazing beads should be put in place by secret nailing and then siliconed in. 


Glazing units can either be double or triple glazed:

Double glazed units; 4–16-4mm with soft-coat low-e and Argon gas filling with a centre-pane u-value of 1.1W/m2K.

Triple glazed units; 4-12-4-12-4mm with soft-coat low-e and Argon gas filling with a centre-pane u-value of 0.7W/m2K.


SAA or Bronze anodised Lever handles

SAA or Bronze anodised thermally broken low threshold

Trickle vents to head of sliding sash

Secure ventilation position (standard)


Frames are supplied pre-assembled, and beautifully finished with a full factory coating from a wide range of stains or paints. 


All timber is finished with a choice of a stains or paints. Paint choices are from the RAL Classic range.


Aluminium cladding on the Thermo HS Alu system is polyester powder coated to a choice from the RAL Classic range. As the Thermo HS Alu frames are made up from two components it is standard to have 2 different finishes, i.e. one paint colour externally on the aluminium and a different colour, possibly a stain, internally.

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