It is Regulation Only Wins
Boston Bruins - 23 wins
The Most NHL team winning streak was in 1987-1988, where the Detroit Redwings had a record of 65 Wins in a row at the end of the season, Their season ending record was the #1 in the league having a 73-5-4 record, they won the Stanley Cup going 27-5-1
It stands for regulation plus overtime wins.
Gilles Gilbert holds the regular season NHL record for the longest winning streak with 17 wins in 1975-76.
25 home wins in a row by the Oklahoma Sooners.