High-quality pipe insulation in HVAC systems maintains the optimum temperature of fluids or gasses transported around a building or facility. 

As hot or cold water has quite a long way to travel throughout a building, it is crucial it maintains its required temperature as much as possible. During this process, it passes many spaces where additional heating or cooling is unavailable, meaning non-insulated pipes can heat up or cool down – with all the negative consequences that can occur as a result of poorly insulated or un-insulated services.


Pipes require different performance levels to keep water hot or cold:  

  • Warm water – insulation prevents heat loss, saving energy when water travels between a boiler or heating system to central heating units.  
  • Cold water – insulation keeps the temperature low and can protect against condensation, ensuring it is delivered at its required temperature. 
  • Rain/waste water – cold water pipe insulation prevents the formation of condensation which can cause corrosion or damage to the surrounding structure and can also reduce unwanted noise. 


Effective insulation means HVAC systems don’t have to work as hard to maintain the operating temperature of the unit, thereby reducing energy consumption.

Discover more about HVAC pipe insulation, and how ROCKWOOL applications can benefit you today.

Error rendering content

Why do we need pipe insulation?

Heating and cooling buildings accounts for around half of all energy consumption1. Reducing the required energy demand can cut both operating costs and carbon emissions for many large constructions – such as airports, apartment blocks, warehouses and schools.  

HVAC pipe insulation improves the operating efficiency of heating and cooling units to keep temperatures comfortable and stable with minimum energy usage. 

The fire resilience properties of our stone wool insulation are also important – especially for hot pipes – as metal pipework can act as heat conductors which can lead to fire spreading through to other compartments. 

Acoustic absorption also limits the impact from noise transfer through HVAC pipework and services on building occupants, minimising daily disruption and creating a comfortable working and living environment. 

Calculator and savings

Insulating the pipework to the standards set out in BS 5422 2009 reduces heat losses by up to 90%.2

Our aluminium faced pipe insulation solutions are designed for HVAC services operating within a temperature range of 0-250ºC.

Insulation thickness is determined by the:

  • Requirements of HVAC solution e.g. personnel protection, condensation control, heat loss.
  • Operating temperature of the piping or duct.
  • Dimensions of the service to be insulated
  • Environmental conditions (humidity in % and temp in °C).

house, calculator, funds, state subsidy, germany
ROCKWOOL products are dimensionally stable. They do not shrink or wear out under the influence of temperature, and they maintain the same level of performance. We use all our knowledge to produce and provide our customers with the best possible solution.

Rob Kooiker

ROCKWOOL Group Product Manager

Case studies

The challenge4

Amager Bakke is an innovative energy-from-waste plant in Copenhagen, Denmark. It turns waste from around 700,000 households into electricity and heating. It also doubles as a leisure facility (with ski slope and climbing wall), as the builders were so confident of its green credentials.

However, to further reduce its emissions and create a safe working and leisure environment, it required high-performance insulation.   

The solution

To achieve high energy efficiency levels, while also protecting workers and local residents from any risk of fire, ROCKWOOL insulation was installed around pipes and elsewhere within the facility.

The results

The properties of stone wool are helping the plant achieve its high environmental goals – improving the plant’s thermal efficiency, protecting workers from heat, and enhancing fire protection.

Amager Bakke/Copenhill
To be updated
13.0 MB

HVAC Systems Guide

To be updated
1.1 MB

HVAC Specification Guide

To be updated
1.2 MB

RockLap H&V Pipe Section Packaging Guide

To be updated
1.4 MB

Thickness of ROCKWOOL Insulation

Download our HVAC Systems Guide

Financial support

Check the Energy Savings Trust website to see whether there are any financial support schemes available for pipe insulation.

Energy Efficiency, Key, Keyboard, Button


Which ROCKWOOL products are best suited for pipes containing hot air?
What is fire stopping?