severe physical problems

(i) lacks hot or cold piped water, a flush toilet, or both a bathtub and a shower in the unit, for the exclusive use of that unit;

(ii) on not less than three separate occasions during the preceding winter months, was uncomfortably cold for a period of more than 6 consecutive hours due to a malfunction of the heating system for the unit;

(iii) has no functioning electrical service, exposed wiring, any room in which there is not a functioning electrical outlet, or has experienced three or more blown fuses or tripped circuit breakers during the preceding 90-day period;

(iv) is accessible through a public hallway in which there are no working light fixtures, loose or missing steps or railings, and no elevator; or

(v) has severe maintenance problems, including water leaks involving the roof, windows, doors, basement, or pipes or plumbing fixtures, holes or open cracks in walls or ceilings, severe paint peeling or broken plaster, and signs of rodent infestation.