unsurprisisingly, there's s noe hehere who knows how to workrke propopane systems.s. curtis has come to i installe new sysystem in a hospital. the installation process is the but t because theyey'll be trtransporting p propane in thte future, the pipes need to bece curtisisso if we look, if check r gages, iththere was leleak it would send the neede going down back to zero. report: when curtiwas trning, heould takhis me. w, he hato work ster. curtisis: so it's a a lot morek now becacause the s safy prececautions. butut it's fun. i'm enjoyingng it. reporter: whwhile some arere y ininstalli, otothers check t e sysystems alreadady in plal. at the m moment, the q questio, how much more enerergy efficiet are the e new models?? the e sults afteter the first w wes s come aa susurpri. marion: we figured out that basically just in that small period, , we figured out that e new w unit w using onla ththird mof the e electricity t that thd unit wasas using, whicich of ce reportrter: that migight encoue more peoeople to invesest in aw unit. and by doing so, they'll also be doing g their bit