Brief Description:HVAC and equipment-room sound-absorbing rock wool board is Class A non-combustible basalt fibre acoustic insulation. Designed for air conditioning rooms, ventilation and smoke exhaust ducts, it offers efficient sound absorption, condensation resistance and low fibre shedding. Suitable for commercial HVAC noise control, fire safety and energy-saving projects.

Haochen HVAC & Plant‑Room Sound‑Absorbing Rock‑wool Board, also referred to as ventilation‑duct acoustic rock‑wool and duct silencer rock‑wool board, is a functional thermal‑acoustic insulation material specially developed for noise mitigation of HVAC systems, ventilation & smoke‑exhaust ducts and mechanical plant rooms. Manufactured from high‑purity basalt fibres via a high‑pressure curing process, it features a stable three‑dimensional interconnected porous structure, combining Class‑A fire resistance, high‑efficiency sound absorption, thermal insulation and water‑vapour resistance. It effectively addresses common engineering issues including air‑conditioning unit roar, duct airflow noise, turbulence noise and plant‑room reverberation. It is the standard noise‑reduction and thermal‑insulation panel for central air‑conditioning, fresh‑air ventilation and fire smoke‑exhaust projects.

In HVAC projects for commercial complexes, office buildings, shopping malls and factories, mechanical equipment within air‑conditioning plant‑rooms generates severe vibration and large air volumes. Persistent airflow noise readily transmits to occupied indoor areas through walls and ductwork. Conventional insulation materials exhibit poor acoustic performance, insufficient fire resistance and high moisture‑absorption tendency, and cannot satisfy both fire‑safety acceptance and noise‑reduction requirements for HVAC systems. Optimised for real‑world operating conditions of plant rooms and ventilation ductwork, Haochen duct silencer rock‑wool range fulfils three key engineering objectives: fire‑code compliance, energy‑saving thermal insulation and noise control.

1. Specialised Advantages for Three Typical Application Scenarios

1.1 Plant‑Room Noise‑Reduction Rock‑wool Board

Plant‑rooms housing air‑conditioning, fresh‑air and refrigeration units accommodate dense mechanical equipment, continuously producing low‑frequency vibration noise and indoor reverberation. Haochen plant‑room noise‑reduction rock‑wool board is used for partition‑wall infill, ceiling sound absorption and equipment cladding insulation. Its distinctive porous‑fibre structure efficiently dissipates sound energy, restrains outward noise propagation and reduces indoor echo and reverberation, greatly improving the acoustic environment surrounding plant‑rooms. With outstanding hydrophobic properties, it suits high‑humidity plant‑room conditions prone to condensation. It resists water absorption, pulverisation and performance degradation over long‑term service, maintaining consistent quiet‑operation and thermal‑insulation performance.

1.2 Ventilation‑Duct Sound‑Absorbing Rock‑wool Board

Under high‑air‑volume operation, fresh‑air ducts, supply‑air and return‑air ducts tend to generate airflow friction noise and duct resonance noise. Ventilation‑duct sound‑absorbing rock‑wool is mainly applied for external cladding insulation & sound absorption of ventilation ducts and shaft cavity filling. It efficiently absorbs medium‑to‑high‑frequency airflow noise and blocks noise transmission via walls and ceilings, eliminating irritating humming duct noise inside occupied spaces. Featuring homogeneous texture, it allows easy cutting and tight fitting, compatible with square and circular ventilation ducts to meet standardised HVAC noise‑reduction construction requirements.

1.3 Duct Silencer Rock‑wool Board

A high‑performance acoustic‑insulation substrate engineered specifically for fire smoke‑exhaust ducts and air‑supply ducts, widely adopted for integrated duct construction combining thermal insulation, noise reduction and fire protection. Boasting dense, stable structure, high toughness and low fibre‑shedding characteristics, it suppresses wind‑pressure noise and airflow‑turbulence noise after duct cladding. It also delivers reliable thermal performance to minimise thermal‑energy loss and prevent condensation dripping and mould growth, fully complying with acceptance specifications for HVAC and fire‑protection works.

2. Core Product Performance Characteristics

2.1 Class‑A Fire Performance for HVAC Fire‑Safety Works

Fabricated from pure Class‑A non‑combustible inorganic mineral material. It prevents flame spread, produces no molten droplets and releases no toxic fumes. Suitable for fire‑critical zones such as smoke‑exhaust ducts and mechanical plant‑rooms, it complies with building HVAC fire‑protection design standards and supports smooth project fire‑code inspection and acceptance.

2.2 High‑efficiency Sound Absorption for Duct & Plant‑Room Noise Control

Its three‑dimensional interconnected porous‑fibre structure provides excellent damping and sound‑absorbing properties. It effectively attenuates vibration noise from air‑conditioning units, duct airflow noise and wind‑pressure reverberation noise, comprehensively optimising indoor building acoustics and improving space tranquillity.

2.3 Condensation‑resistant & High‑moisture Tolerance for Humid HVAC Conditions

Subjected to integral hydrophobic treatment, the board resists condensate erosion and humid‑air penetration within ducts and plant‑rooms. It avoids performance failure and deformation caused by moisture ingress, retaining stable properties under prolonged high‑humidity service.

2.4 Robust Structural Integrity, Low‑dust Installation with Minimal Fibre Shedding

Formed by high‑pressure curing, fibres are tightly bonded for high structural coherence. Minimal dust and fibre shedding occurs during cutting and cladding operations. Well‑suited for standard‑site practices including duct cladding, plant‑room infill and shaft sealing, enabling clean and efficient installation.

2.5 Combined Thermal‑insulation & Noise‑reduction for Energy‑saving & Cost Optimisation

Whilst delivering effective noise attenuation, it blocks heat and cold transfer through ductwork, lowers overall HVAC energy consumption and prevents duct‑surface condensation, mould and corrosion. It achieves multi‑functional integration of fire protection, thermal insulation and noise reduction, cutting overall project operation and maintenance costs.

3. Common Engineering Specifications

Common Densities: 80 kg/m³, 100 kg/m³, 120 kg/m³. Further custom densities are available upon request.

Common Thicknesses: 30 mm, 50 mm, 60 mm, 80 mm, 100 mm. Other non‑standard thicknesses can be custom‑manufactured.

Standard Size: 1200×600 mm. Various non‑standard dimensions can be customised according to project requirements.