Published: 12/12/2025
Energy Efficiency & Heat Recovery in Compressed Air Systems
Compressed air is widely recognised as a clean and reliable energy source in the industry sector, and compressed air systems are growing in popularity by the day. In fact, they are currently estimated to account for over 10% of the UK’s total industrial energy consumption.
However, for businesses that actively use compressed air, this figure can be much higher, with up to 30% of their entire energy use coming from their compressed air system alone. With such a large share of energy demand, there is a significant opportunity to make these systems run even more efficiently.
Between 70-94% of air compressor energy consumption is lost to heat. While heat generation is inevitable as the air compressor operates, it’s time for businesses to put strategies in place as UK energy bills rise.
The good news is that companies can easily minimise these costs with air compressor heat recovery, which cleverly recoups around 90% of that heat in the process.
Below, we’ll discuss more about how heat recovery works and the benefits it can bring to your business.
How much energy do air compressors use?
Air compressors are one of the largest energy-consuming machines on a manufacturing site. Yet, only 15% of the energy that goes into producing compressed air actually becomes usable. The rest is lost as heat. When you scale that across multiple compressors running long hours, it adds up.
For many manufacturers, this inefficiency translates into millions of pounds in avoidable energy costs over your compressor’s lifespan.
What is compressor heat recovery?
Although the majority of compressor heat is generally lost, it can be put to good use, rather than evaporating into thin air. It can be redirected to support other areas of the site via waste recovery technology. While you may choose to buy a brand new energy-efficient air compressor, you don’t always have to. Instead, you can convert your existing compressor to reuse energy already produced.
What are the benefits of heat recovery?
Recovering heat from compressed air systems is a strategic move to reuse wasted energy. By capturing the heat that compressors naturally generate whilst in action, businesses can benefit in several ways, including:
Reduced energy costs
One of the main benefits of an air compressor heat recovery system is that your company could save thousands of pounds every year. Heat can be reused by being transferred to water boilers for pre-heating taps and radiators, and even other parts of production, without needing brand-new energy sources. What’s more, it also reduces strain on existing air compressors, minimising the need for replacement and hefty repair costs.
Find out more about how heat recovery systems reduce energy costs.
Reduced carbon emissions
As the heat captured is usually released into the atmosphere, it can instead be used to generate other systems in the factory. Therefore, fossil-fuel heating can be eliminated. By going down this route, you’re able to reduce your company’s carbon footprint and contribute to better environmental practices. Businesses can also meet efficiency standards, such as ISO 50001 and ESOS.
Less strain on air compressors
With a heat recovery system for an air compressor in place, your existing system is more likely to stand the test of time. By reducing the demand for cooling air, heat recovery helps prevent daily overheating – a common cause of stress and damage in compressors.
How much could you save with an energy-efficient air compressor?
Heat recovery can deliver significant cost reductions in relation to energy bills. For example, a unit running 20 m³/min at 8 bar for 8,000 hours annually could see energy costs soar with electricity at 13p/kWh.
By installing a heat recovery system, businesses could save approximately £70,000 per year by replacing a gas heater or £130,000 with an electric heater. In turn, your business could cut costs by a whopping 91%!
How to recover heat for improved compressor efficiency
There are two main ways businesses can recoup the heat produced by existing air compressors, as follows:
Space heating
One of the simplest ways to put compressor heat to work is by redirecting the hot air into specific areas of your manufacturing facility. By installing ductwork from the compressor outlet to the factory floor, the clean air can be used as a key heat source during the chillier months.
Because the air leaving the compressor is already filtered, you don’t need to worry about giving it any additional treatment. When the weather warms up, the ducting can be switched so that the air is guided outdoors with an in-built flap.
Water pre-heating
Another highly effective method is to use compressor heat to pre-warm water before it enters the boiler. This recovered heat can support office heating systems and welfare facilities, such as showers, for example.
An oil-to-water heat exchanger connects to the compressor’s cooling unit. Then, as boiler feed water passes through this exchanger, it absorbs heat from the compressor oil, reducing the boiler’s workload and lowering energy consumption.
Will heat recovery have a knock-on effect on my compressor’s performance?
A professionally-designed heat recovery system will in no way impact the performance of your compressor. In fact, it can positively impact the lifespan of the system, as it is less likely to overheat and cause wear and tear to internal components.
Start recovering energy from your air compressor today
While compressed air is vital for any industry, are you really comfortable losing 90% of the energy that it produces? Heat recovery is a simple way to recover lost warmth and help you slash your company’s energy bills.
If you’re looking for a more energy-efficient air compressor or heat recovery system to boost compressor efficiency, then get in touch with Air Supply Manchester today. We’re more than happy to speak to you in more detail about improving the efficiency of your compressor and cutting business costs, while helping you reduce your carbon footprint. We’ll be happy to suggest the best possible air compressor solution for your business.