<prompt> Translate the following text to EnglishKuweka SCR katika eneo lililoinuliwa karibu na boiler economizer na preheater ya hewa mara nyingi hufanywa ili kupunguza urefu wa ductwork na hasara ya shinikizo inayohusiana na kwa sababu hakuna mali isiyohamishika ya ziada inahitajika kwa ajili ya SCR.  <response>: Locating the SCR in an elevated location near the boiler economizer and air preheater is frequently done to minimize the length of ductwork with the associated pressure loss and because no additional real estate is necessary for the SCR reactor. 