About heat exchanger in poultry houses

Hello. If you know about utility of heat exchangers (Earny from Big Dutchmann or Clima + from Vencomatic or other) in poultry houses please share your information. From my research, the utility of the heat exchanger in could areas where you use direct heating (like G12 or other kind of heating with CO2 and water production directly inside of the house) is high. But if you use indirect heating (water heating or indirect heaters) and you have a minimum air exchange the utility of heat exchanger is not enough to compensate the cost of the equipment. What is your opinion about that? Thank you. Ing. Dragan Ionut