Air Duct Insulation - Refrigeration and HVAC

Marine air duct insulation is applied to HVAC and refrigeration ductwork on ships to reduce heat gain or loss, prevent surface condensation, and limit noise transmission. Common materials include closed-cell elastomeric foam, mineral wool, and glass wool with marine-suitable facings.

ProShipWorks provides end-to-end support to source and supply Air Duct Insulation for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.

Last updated: October 11, 2026

Product Information

Product Name	Air Duct Insulation
Product Category	Refrigeration and HVAC
Product Reference	1448
Brands / Manufacturers	Armacell, K-Flex, ROCKWOOL
Unit of Measure	Square meter

Key Features

Key Feature
1. Thermal insulation for supply, return, exhaust, and refrigeration air ducts
2. Controls condensation on cold-air duct surfaces
3. Available in closed-cell elastomeric foam, mineral wool, or glass wool
4. Marine-grade facings can provide moisture and mechanical protection
5. Fire performance and low-smoke properties may be required for shipboard use

Applications of Air Duct Insulation

Application
1. Marine HVAC supply and return air ductwork
2. Refrigerated-air and chilled-air duct systems
3. Accommodation, engine-room, machinery-space, and cargo-area ventilation systems

Models & Manufacturers

Model	Manufacturer
AF/ArmaFlex	Armacell
K-FLEX ST	K-Flex
SeaRox	ROCKWOOL

Technical Specifications

Model	Specification	Value	Unit
AF/ArmaFlex	Material	Flexible closed-cell elastomeric foam	—
K-FLEX ST	Material	Closed-cell elastomeric insulation foam	—
SeaRox	Material	Stone wool insulation	—

Standards, Certifications & Class Approval

Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.

Applicable Standards & Certification	Marine suitability may require compliance with SOLAS Chapter II-2 and the IMO FTP Code, particularly fire-test requirements. Product-specific approvals and thermal performance should be verified against the manufacturer’s technical documentation. ISO 12241 may be referenced for thermal insulation calculation and installation practice.
Class Approval	Class acceptance is product-, vessel-, location-, and application-specific. DNV, ABS, Lloyd’s Register, Bureau Veritas, and ClassNK may accept insulation systems when supported by appropriate fire-test reports, type approval, and installation documentation.

Installation, Maintenance & Safety Information

Installation Notes	Clean and dry the duct surface before installation. Apply continuous insulation with tightly butted joints, sealed seams, and a continuous vapor barrier on cold ducts. Use approved marine adhesive, tapes, pins, or mechanical fixing as specified by the manufacturer. Maintain required clearances from hot surfaces and fire boundaries.
Maintenance Tips	Inspect periodically for damaged facings, open joints, moisture ingress, compression, and detachment. Repair vapor-barrier breaches promptly and replace wet or contaminated insulation. Keep access panels, dampers, fire dampers, and inspection points unobstructed.
Safety Notes	Follow the approved material safety data sheet and shipboard fire-control requirements. Use suitable respiratory, eye, and skin protection when cutting mineral wool or glass wool. Do not install combustible insulation where prohibited by the vessel’s fire plan, class rules, or flag-state requirements.