<prompt> Translate the following text to EnglishKama ilivyoelezwa hapo awali, vifaa vinavyohitajika kwa ajili ya mitambo ya boiler nyingi kwa ujumla hazipunguzwi kwa kiasi kikubwa juu ya miradi ikiwa ziliwekwa kando.  <response>: As noted earlier, the material needed for multiple boiler installations is generally not reduced significantly over the projects if they were installed separately. 