Abstract: An insulation panel (1) for cabinets containing air handling equipment has an exterior housing section (2) and an interior housing section (3) which is joined to the exterior housing section by snap-in engagement means, preferably comprising a plurality of tabs (12) provided on the interior housing section. The tabs engage a flange (6) of the first housing section (2) via a first gasket (13), and a circumferential side wall (10) of the second housing section (3) abuts against the first housing section (2) via a resilient second gasket (14), whereby the tabs (12) abut against said first gasket under some pressure to firmly secure the first and second housing sections to each other without creating any thermal bridges between the housing sections.