There is nothing
standard about Lepido

The world’s first heavy-duty heat exchanger

Founders' Note

In challenging ventilation environments like restaurant kitchens, you need a heavy-duty solution to handle the soot and grease.  So, we’ve invented Lepido - the worlds first heavy-duty heat exchanger. A solution that makes energy recovery in impossible environments both possible and profitable.

A number of Lepidos are already up and running in several restaurants, hotels and schools throughout Europe. And, it delivers perfectly. Saving money, energy and CO2 emissions every day.


To convince you, we've done some slightly odd, somewhat scientific and fun demonstrations. Not our standard procedure, but hey, they prove the point. And yes, it was a dirty job, but someone had to do it. Scroll to the end to see the videos!

Nils & Jesper

No more waste

How it works

Lepido recovers energy from polluted airstreams thanks to our patented Particle Repellent Geometry (PRG®) technology. Watch the video to know more

Seeing is believing

Why heavy-duty?

Pictures speak louder than words, and these gory real-life pictures of restaurant exhaust ducts are pretty vocal. The grease and soot that are formed when cooking is notoriously hard to deal with and to recover energy from. So, even if there is a standard recovery system in place, it’s normally not working very well, or not at all.

Case Study

Burger King Malmö, Sweden

Based on data from our test rig at Burger King in Malmö, Sweden, we are able to recover 86.000 kWh per year. See below for how it is set up, and how the air pressure drop is sustained. 


Conditions :
Restaurant: Burger King - Bulltofta
Region: Malmö, Sweden
Outdoor design temperature: -14 C
Exhaust airflow: 1020 l/s
Supply airflow: 2000 l/s
Lepido Model: L12
Exhaust temperature in air duct: 34 C
Ideal inlet air temperature: 18 C
Operating hours/day: 16h
Energy recovered/year: 86000 kWh
Calculated CO2 savings/year: 4,3 ton
Installed: 2020-10-21

Lepido's average energy recovery per restaurant and year in kWh


Standard VS Heavy Duty

This is what happens if you use standard equipment in extreme environments...