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.