See all products of Deaerators for systems with technical room The deaerator separates and removes the air circulating within the closed circuits of heating and cooling systems with a technical room. DISCAL®, Technopolymer deaerator. DISCAL®, Technopolymer deaerator. Insulation for technopolymer deaerators 551 series. DISCAL®, Deaerator. DISCAL®, Deaerator.