Possible Clues:

• It's the turn of the mister to get a little heated
• Measurement of heat
• Contractual condition covering hospital heating unit
• Heating unit equal to 100,000 BTU
• One on the Bench gets heated
• Unit of heat as in gas supply
• A hot unit, the Marines!
• Irish one of Somerville and Ross produces some heat
• Unit of heat and gas measure
• Article on marine's unit when the heat's on?