Related Clues:
- Appliances with BTU ratings
- Room coolers: Abbr.
- Their capacity is measured in BTUs
- BTU producers
- Summertime coolers, for short
- Apt. rental extras
- Elec. coolers
- A.C. units
- Air-conditioner units: Abbr.
- Summer coolers: Abbr.
- BMW amenities
- Bldg. units?
- Windows may have them installed, briefly
- Heat extractors: Abbr.
- Heat meas