How should a cylinder or calorifier be insulated?

Injection-insulated steel casings, foam spray insulation and cased polyurethane finishes compared.

World Heat Cylinders provides several advanced insulation methods to ensure the best possible heat retention for your hot water cylinders and calorifiers:

Plastic-Coated Steel Casing with Injection Insulation

For superior thermal performance and durability, our plastic-coated galvanised steel cased cylinders with high-density polyurethane injection insulation provide the greatest insulation values. This method ensures a complete, void-free insulation layer that minimises thermal bridging.

Maximum Efficiency: Offers exceptionally low standing heat loss.
Durable Finish: The robust steel casing protects the insulation and cylinder from site damage and provides a clean, professional appearance.
Variety of Colours: Standard white gloss finish, with other colours potentially available on request for larger projects.

Foam Spray Insulation

We can apply polyurethane foam spray insulation to cylinders up to 500 litres in capacity. This method effectively covers the entire surface of the cylinder, providing good thermal insulation properties.

Good Thermal Performance: Reduces heat loss effectively for smaller to medium-sized domestic cylinders.
Seamless Coverage: Adheres directly to the cylinder surface, eliminating gaps.
Cost-Effective: A popular choice for many standard domestic applications.

Polyurethane Injection with Cased Finish (Commercial)

For large commercial calorifiers, we typically apply 50mm up to 100mm of high-density polyurethane injection insulation. This is subsequently encased in a durable steel outer casing, often with a grey painted or plastisol finish (other finishes may be available).

Superior Heat Retention: Ideal for large volume storage, ensuring minimal energy wastage.
Robust Protection: The casing safeguards the insulation and vessel in demanding plant room environments.
Tailored Thickness: Insulation thickness can be specified to meet project-specific U-values or heat loss requirements.

Discuss Your Cylinder Insulation Requirements

Choosing the right cylinder insulation and finish is vital for long-term performance and energy savings. If you would like to discuss any of these finishes for your cylinders, or if you have bespoke insulation requirements, please feel free to contact one of our expert technical sales people.

You can reach us on 0161 343 8610 or email sales@whcylinders.co.uk.

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Need a cylinder built to your specification?

From 10 litres to 10,000 litres, our Manchester team designs, manufactures and tests every vessel in-house. We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.

Cylinder and calorifier insulation options