Kingspan Kooltherm Pipe Insulation
Kingspan Kooltherm Pipe Insulation — Premium Phenolic Foam
Kingspan Kooltherm pipe insulation is the UK's leading premium phenolic foam pipe insulation, manufactured by Kingspan and specified by mechanical engineers and HVAC contractors where the thinnest possible insulation wall is required without compromising thermal performance or Part L compliance. With a thermal conductivity of λ = 0.025 W/mK — significantly lower than elastomeric foam alternatives — Kooltherm allows thinner wall thicknesses to achieve the same or better thermal performance, saving space in congested plant rooms and service risers.
Kooltherm pipe insulation is Class O fire rated, foil faced and available in all standard UK pipe sizes from 15mm to 219mm OD, in wall thicknesses from 20mm to 60mm.
Why Kingspan Kooltherm?
- Lowest thermal conductivity — λ = 0.025 W/mK, significantly lower than Armaflex (λ 0.033) or Rockwool (λ 0.034). Thinner walls achieve the same performance, saving space in congested risers and plant rooms
- Class O fire rated — BS 476 Part 6 & 7, B-s1,d0 to EN 13501. Suitable for all commercial building applications
- Foil faced — factory-applied aluminium foil facing provides a clean, professional finish and additional vapour resistance at the outer surface
- Part L compliant — thinner Kooltherm walls meet the same Part L requirements as thicker elastomeric or mineral wool insulation
- Heat network approved — specified for district heating and heat network pipework
- Rigid and dimensionally stable — maintains its shape and wall thickness under compression from pipe clamps and supports
Technical Specifications
- Material: Rigid phenolic foam with aluminium foil facing
- Fire classification: Class O (BS 476 Part 6 & 7), B-s1,d0 (EN 13501-1)
- Thermal conductivity: λ = 0.025 W/mK (aged value)
- Operating temperature: -180°C to +110°C
- Facing: Aluminium foil (HVAC grade)
- Density: Available in 37kg/m³, 60kg/m³ and 120kg/m³ grades
Kooltherm Density Grades
- 37kg/m³ (standard) — standard grade for most HVAC, heating and chilled water applications
- 60kg/m³ (medium density) — enhanced compressive strength for district heating and heat network pipework
- 120kg/m³ (high density) — maximum compressive strength for heavy industrial applications and high point loads
Kooltherm vs Armaflex — Which Should I Choose?
- Use Kooltherm when space is constrained, when the specification calls for phenolic foam, for district heating and heat network pipework, or when B-s1,d0 low smoke performance is required
- Use Armaflex EVO for chilled water and refrigeration where a built-in vapour barrier is essential, for complex pipework with many fittings and bends, or for standard HVAC and heating where space is not constrained
Common Applications
- Commercial heating mains and primary circuits in space-constrained plant rooms and risers
- District heating and heat network pipework (60kg and 120kg grades)
- Chilled water mains where thin-wall specification is required (with careful vapour sealing)
- LTHW and MTHW heating systems in commercial buildings
- Hot water distribution and calorifier connections
- Industrial process pipework up to +110°C
Installation Notes
Kooltherm pipe insulation is a rigid phenolic foam and requires different installation techniques to flexible elastomeric foam. All longitudinal joints and butt joints must be sealed with Kooltherm-compatible foil tape to maintain the vapour barrier. For chilled water applications, particular care must be taken to seal all joints, fittings and penetrations.
Shop by Pipe Size
15mm | 22mm | 28mm | 35mm | 42mm | 54mm | 76mm | 89mm | 114mm
For specification support, help selecting the right Kooltherm grade or wall thickness, or technical advice on district heating insulation, call our team on 0161 775 1190 (Mon–Fri 8am–4pm).
