Ductwork and flange sealing that reduces energy loss
HVAC systems lose measurable energy at every poorly sealed flange and joint. Schlegel Q-LON gaskets applied to ductwork flanges and connections prevent conditioned air from escaping, maintaining temperature consistency and reducing the load on heating and cooling equipment. Q-LON’s polyurethane foam core delivers a thermal conductivity of just 0.04 W/m·K at 0°C, 3 to 6 times lower than extruded alternatives.
Vibration dampening for blowers, motors and fans
Blowers, fans and motors in HVAC units generate continuous mechanical vibration that loosens fasteners and transmits noise through building structures over time. Q-LON gaskets absorb this movement at source, reducing noise transmission and protecting mechanical connections from fatigue.
Weather sealing for outdoor and rooftop HVAC units
Rooftop and ground-mounted HVAC units face constant exposure to rain, UV radiation and airborne debris. Schlegel Q-LON’s polyethylene outer film resists UV degradation and is unaffected by paints, detergents and atmospheric conditions, making it suited to sealing outdoor unit enclosures. The same material performs in access panel gaskets and hatches, ensuring doors remain properly sealed to maintain consistent airflow and system pressure across the installation’s full service life.
Component sealing for compressors and heat exchangers
Compressor housings, heat exchangers and valve assemblies require tight, durable seals to prevent refrigerant leakage and fluid ingress. Schlegel Q-LON gaskets provide a reliable compression seal in these critical junctions, with long-term recovery performance that maintains sealing integrity as components expand and contract during operation.
Engineered sealing solutions and early design engagement
Schlegel supplies leading HVAC system manufacturers across the UK and Europe. HVAC manufacturers with specific sealing requirements can access Schlegel’s custom design service. Schlegel engineers work at the design stage to advise on gasket specification, compression tolerances and material selection, reducing the risk of re-work and costly late-stage design changes.
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Contact us do discuss every aspect of our sealing solutions for windows and doors.
Technical information, brochures and product data sheets
Access the full Schlegel technical library including product data sheets for Q-LON, brush pile and extruded seals, downloadable brochures covering EN 12365 compliance, and installation guides for timber, aluminium and uPVC applications. All documents are available to download free of charge.