It's nothing serious. It just changes the direction of receiving gas. Judging from what you said, the north gate is in the northwest of the house, no problem. However, there was a superstition about geomantic omen in ancient times, saying that a house like yours formed an upside-down house, which was unfavorable. But according to the Yijing Feng Shui and Kong Xuan Feng Shui, I think it's no problem.