Historical clue formulations

• A/C capacity — 2025-04-06
• About 91,500 are produced by a gal. of propane — 2024-11-16
• Air-conditioner measures, for short — 2022-07-04
• Heater meas. — 2022-04-27
• A/C measures — 2020-12-06
• Air-conditioner fig. — 2017-10-01
• Energy qtys. — 2016-11-11
• Air-conditioner fig. — 2014-11-16
• A/C measures — 2013-11-03
• HVAC measures, for short — 2013-09-15
• A/C specs — 2013-04-02
• Energy qtys. — 2012-12-14
• Furnace meas. — 2011-12-10
• A/C measures — 2010-07-26
• A/C measures — 2009-05-18
• A.C. measures — 2009-04-05
• A/C measures — 2008-06-11
• Heater stats — 2006-05-04
• Appliance figs. — 2005-09-08
• A/C units — 2005-04-15
• A/C measure — 2004-05-08
• Heater stats — 2004-04-22
• Relatives of calories: Abbr. — 2002-08-04
• Air conditioner meas. — 2001-06-25
• Air conditioner capacity, for short — 1999-03-15
• A.C. capacity — 1996-05-31
• Cooling capacity — 1995-09-17
• Heat measures, for short — 1994-06-19
• Heat quantities: Abbr. — 1993-11-24