Orders. In exercising the above-mentioned powers, the Board may reverse or affirm, wholly or in part, or may modify the order, requirement, decision or determination appealed from and may make such additional order, requirement, decision or determination as ought to be made and as may be pertinent or germane and, to that end, shall have all the powers of the officer from whom the appeal is taken. Written notice of any such order, requirement, decision or determination shall be promptly given to all parties in interest.