M. U. David, E. Kenneth, S. A. Tegwi, N. Gukup, and F. Oni, “A Holistic Approach to HVAC Design: Balance Load Calculation and Piping for Comfort and Sustainability”, Direct Res. J. Eng. Inform. Tech., vol. 14, no. 2, pp. 20–29, Jun. 2026, doi: 10.26765/DRJEIT64580354.