“…The results of calculation and experimental studies of daily heat absorption of a flat air-and-water collector are presented in the (Batukhtin et al, 2015a;Batukhtin, et al, 2014;Bass et al, 2012;Pinigin and Batukhtin, 2012;Kirillov et al, 2013;Bass et al, 2013;Goryachikh and Batukhtin, 2013;Pinigin and Batukhtin, 2015;Batukhtin et al, 2015b) for a circuitwise collector (Fig. 1 (Patent RF №2403511)), will be 106 kW/m 2 .…”