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Our service, your satisfaction

Our service at exodraft heat recovery systems: Everything from one place

  • Measuring and analyzing chimney systems as basis for efficiency calculation of heat recovery
  • Planning for retrofitting and new installations
    • Chimney systems
    • Mechanical chimney draft
    • Heat recovery
    • Control mechanism
    • Connecting water
  • Project planning with all involved parties
  • Extensive commissioning
  • Service and maintenance
  • Inspection and calibration service

exodraft analyses, plans, and designs both existing and brand-new installations. Along with both internal and external individuals, we realize your project and help you through all phases of the project.


By using our heat exchanger, up to 95% of heat that would have been lost otherwise can be recycled. The energy lost as flue gas or process heat usually amounts to between 10% and 15%, and we can help reduce this loss to a minimum.

The effective use of waste heat coupled with competitive prices means that an investment in heat recovery can be repaid within a few years. At the same time, CO2 emissions are reduced, benefitting the environment and the company’s green accounting.


Excess heat in steam and flue gas can be recycled using our heat recovery systems, be converted into hot water, or find further use. Possibilities include reintegration of waste heat into the original process or internal use through integration with other processes, space heating, cleaning, or bathing facilities.

Therefore, it makes sense to utilize the considerable amounts of energy present in flue gas, steam and other heat processes. Waste heat that cannot be used internally can also be transferred to a third party, such as a municipal district heating network.

Free calculation

How much energy can be recycled, how much you can save, and how much less CO2 will be emitted is something we can calculate using our calculator software Exodraft OptiCalcHR™. Contact us – and have us calculate your savings today.


As the world’s leading supplier of integrated solutions for recycling of flue gas and process heat, we have abundant competence, understanding, and experience. It is an important prerequisite for efficient recycling of flue gas to understand the connection between chimney draught and efficient combustion.


Take a look at our video and have the most important information presented to you in 1:49 minutes


We don’t compromise on quality, and our solutions are produced according to ISO 9001 and developed with a focus on maximum safety and efficiency.

At exodraft, we have set the bar for collaboration between chimney fans and heat recovery systems, and our products are sold in more than 40 countries all over the world.

Heat recovery systems & units

A heat recovery system from exodraft can extract heat energy through a heat exchanger from exhausted flue gasses and convert it into hot water with the extracted heat energy. Therefore, up to 80% of the heat can be recovered, that would otherwise have been lost through the chimney system and can be brought back at converted to the heating system.

The performance of a heat recovery ventilation (HRV) system depends on multiple factors, for example: how airtight the dwelling is, the design of the heat exchanger and the application from which the waste heat I recovered. A heat recovery unit can convert waste heat into useful heating for offices, houses, bathing facilities and even returned to district heating.

How does heat recovery systems work?

The heat recovery process works by continuously converting waste heat which gets extracted from flue gasses and converting it into hot water. Responsible for this process is a heat exchange unit in the heat recovery system, that is incorporated into the flue gas chimneys. The exhausted flue gasses can have a temperature up to 1200°C and can be cooled down to 30°C till 60°C. In general, a heat exchanger unit works through transferring the air heat onto a medium, like water, oil, metal or air which can be used in e.g. the central heating system in the factor and offices.

Different heat recovery solutions for various surroundings and settings got developed to facilitated different forms of heat extractions. One of the most used forms is a waste heat recovery or flue gas heat recovery system.

How can a waste heat recovery system be an effective energy saving solution?

A waste heat recovery system is especially used on an industrial scale with a vast amount of exhaust / flue gasses. Rising energy prices, environmental standards for companies and the legal reduction for CO² emissions create a rising demand and popularity for this type of system. Waste heat is generated through the everyday usage of electrical machines, large boilers units or cooling systems. The rate for lost energy through flue, exhausted gas or general process heat is around 15 to 20 %. But through a waste heat recovery system can up to 90% of the exhausted heat be recovered. A heat recovery unit is therefore especially useful, when a vast amount of heat gets exhausted through a ventilation system.

Especially industrial bakeries ,beverage productions ,drying facilities and metal processing plants implement and profit extensively from a waste heat recovery system. These industries are also strongly affected by the changing energy prices and are depending on a stable and calculatable costs for heating. Energy-intensive industrial companies get a greater independence from changing energy prices and can save up to 16% of the energy costs. A waste heat recovery system is usable for nearly all fuel types like oil, gas or various kinds of liquids. The won energy can increase significantly the boiler efficiency.

Functions of a waste heat recovery unit

A waste heat recovery unit typically is made from metal and is implemented between the heat generating process (e.g. a boiler or industrial oven) and the chimney. Thus, it is not necessary to install a completely new production unit to save energy. A small adjustment and installation of the heat exchanger unit saves time, money and can have the same results as a completely new production unit. Another great advantage of a waste heat recovery system is the fact that the flue gasses are cooled down, which have many benefits. One of them is the fact that by cooling the exhaust down, waste heat recovery units can liquefy gaseous exhaust and filter out pollutants. The resulting condensation can be derived into the sewage without filtration.

What are the benefits of using heat recovery systems

Using a heat recovery system has many advantaged, whether is it the massive reductions of emissions ratings, the minimization of the energy usage or the improvement of the air quality inside the property. The system reduces the carbon dioxide and lowers the overall emissions level. The biggest benefit for the implementation of a heat recovery unit is the cost factor. Up to 90% of heat in the waste heat can be recovered. It helps both the environment and lowers the energy costs significantly. A heat recovery unit can be retrofitted on existing flue / chimney systems and is, therefore, a cost saving solution to reduce the energy costs, without implementing a whole production unit or chimney system. Overall provides the solution a balanced system that recovers heat, which would have been lost and wasted.

Main benefits for the commercial premises when converting waste heat into heating of the facilities are the supply of cleaner and constant heating for the benefit of all employees at any time in the year. The lifetime of large boilers or industrial ovens are extended because sudden temperature changes or high temperatures that cause excessive wear and tears can be avoided. The existing boiling or industrial oven work more efficiently and through the reduction of the emissions can the credibility of companies that are working in a greener environment increased. The initial costs for the implementation of a heat recovery system reach the return on investment after 2 years.

Why choose exodraft

exodraft produces one of the best performing waste heat and flue gas heat recovery systems for industrial factories and has extended experiences in developing and installing the newest heat recovery systems. Important for a heat recovery system is the right size and dwelling design, that can influence extensively the outcome of the final energy savings. The installation of a heat recovery system according to customer requirements and local settings can only be executed by a company with many years of experience.

Heat recovery units need maintenance and servicing throughout their lifetime to ensure the optimal airflow and a consisted energy efficiency. exodraft offers excellent customer service and guarantees a perfectly functioning system for every setting. Only experts in the field of heat recovery systems can assess which solution is the best option for the specific setting.

exodraft provides durable and long-lasting heat recovery units made out of stainless steel. The system has a low maintenance rate and is one of the most efficient one on the market. The right choice for the heat recovery unit and the ducting choice has direct impact on the performance of the system and costs associated with the installation. It will be ensured that the right system for your specific circumstances and that fits your purposes is chosen. An important aspect is the location for the heat recovery systems, because of the noise, accessibility and performance level.

The perfect fit for the maximal efficiency will be ensured. The compact design of the exodraft system requires minimal space and can be installed in close conjunctions with in a heat production unit. To avoid operation interruptions during cleaning or maintenance operations, a second heat exchanger unit can be ordered and be easily installed, while the main exchanger is cleaned.