23 International exhibition of energy-efficient heating, ventilation, air conditioning, industrial cooling, water supply & treatment, renewable energy, plumbing and swimming pools
18–20 May 2021 • International Exhibition Centre, Kyiv, Ukraine

Solid fuel heating boilers RETRA

As raw materials, you can use coal, anthracite, firewood, briquettes, peat, woodworking waste, briquetted husk, straw, waste paper - manual fuel supply.
It is possible to use fuel raw materials with high humidity (60% or more).


  • efficiency up to 86-93%;
  • Robust combustion chamber made of 5 mm thick steel provides equipment service life of 15 years and more;
  • System of cutting the air flow throughout the entire volume of the furnace, which ensures complete combustion of fuel;
  • Air flow adjustment system for any type of solid fuel and combustible waste;
  • Electronic control of forced air supply with the possibility of installing a climatic thermostat and remote control functions;
  • Five years warranty for the heat exchanger;
  • Ability to clean the grate and fuel stirring during operation;
  • System for keeping heat removal with flue gases, the temperature of which in a stable boiler mode is 90-110 ° С;
  • One-time fuel loading is 7-36 hours;
  • If necessary, the boilers are equipped with an automated fuel or wood chips supply bunker.

Find out more at the company's stand.