Air-side　heat　transfer　and　pressure　drop　performances　of　nine　triangular　wavy　fin-and-tube　heat　exchanger　coils　were　experimentally　investigated.　The　Nusselt　number　and　friction　factor　correlations　were　provided　in　a　wide　range　of　Reynolds　numbers.　The　results　revealed　the　effects　of　fin　space　and　the　number　of　tube　rows　on　heat　transfer　and　pressure　drop.　In　addition,　the　present　results　were　compared　with　those　of　plain　plate　fin　and　triangular　wavy　fin　heat　exchanger　surfaces　in　the　literature.