CHELSEA, MASS. — MassHousing has provided an $18.1 million loan for the refinancing of Admiral’s Tower, a 100-unit housing cooperative located in the northeastern Boston suburb of Chelsea. The six-story building was originally constructed in 1986 and houses 26 studios and 74 one-bedroom units. The borrower, CSI Support & Development Services, will use a portion of the proceeds to fund capital improvements and preserve the property’s affordability status. Renovations will include kitchen and bathroom refurbishments, masonry repairs, new doors and fencing and the addition of a fitness center and staff offices.