"In-situ comparison between the energy performance of an in-slab gas he" by Georgios Kokogiannakis, Daniel Daly et al.
Sub-metered energy use of an in-slab gas hydronic heating system and a newly installed split system air conditioner in thermodynamically-equivalent classrooms are compared during unoccupied (with artificially imposed internal heat gains) and occupied periods. A preliminary comparison is also undertaken to quantify the heating penalty for the existing gas-fuelled hydronic heating systems when windows remain open (e.g. to comply with COVID-19 guidelines in schools) against the energy needed for heating by the same system in a control classroom with windows closed. The performance evaluation of t...