In consideration of all appeals and all proposed variations to this chapter, the Board of Appeals shall, before making any variations from the chapter in a specific case, first determine that the proposed variation will not impair an adequate supply of light and air to adjacent property, or unreasonably increase the congestion in public streets, or increase the danger of fire or endanger the public safety, comfort, morals, or welfare of the inhabitants of the Township. The concurring vote of a majority of the Board of Appeals shall be necessary to reverse any order, requirement, decision, or determination of the Building Department, or to decide in favor of the applicant any matter upon which it is authorized by this chapter to render a decision.