=SUM(IF(ISNUMBER(FIND("H",F1:R1)),1,0))
This is an array formula - confirm with ctrl+shift+enter, not just enter. It's case sensitive and will count all cells in the range F1:R1 that contain one or more letters"H".
Code:=SUM(IF(ISNUMBER(FIND("H",F1:R1)),1,0))
=SUM(IF(ISNUMBER(FIND("H",F1:R1)),[COLOR="#FF0000"][B].5[/B][/COLOR],0))