Commercial vehicle exhaust systems are facing multiple challenges. Ever tighter engine emission requirements demand ever more efficient DPF and catalyst performance and this, in turn, requires ever more effective heat management. These systems have necessarily increased in size putting more pressure on overall packaging, with hot exhaust system components encroaching on systems that could potentially be damaged by heat. There is also a desire to keep heat in the exhaust to maintain turbocharger efficiency and response. Continuing just-auto/QUBE's series of interviews, we spoke to heat management specialist Zircotec's Group Sales Director, Graeme Barette, about some novel approaches that could address both issues.