I Gusti Agung Gede Kusuma Artha, Sucipta, M. and Hendra Wijaksana 2023. Analysis of Heat Recovery System Performance Using a Serpentine-Type Heat Exchanger on Water Heater with Fins Number Variation. Natural Sciences Engineering and Technology Journal. 3, 1 (Jan. 2023), 182-189. DOI:https://doi.org/10.37275/nasetjournal.v3i2.34.