Heating Β· Ventilation Β· Air Conditioning Β· Change Your Filter
HVAC Systems
A trade where the big copper line is the insulated one, the most expensive part is the one nobody wants to name out loud, and the fix is a dirty filter more often than anybody wants to admit. Six games for techs, installers, apprentices, and homeowners who know what MERV stands for.
π‘οΈ 6 Games
π§ 64 Questions
βοΈ 72Β° and Holding
"Heat cannot of itself pass from a colder to a hotter body." β Rudolf Clausius, stating the second law of thermodynamics, 1854
πΉοΈ Games & Challenges
Service Call Trivia
Forty questions on refrigeration, gas heat, airflow and heat pumps β plus the guy in Brooklyn in 1902 who was only trying to keep ink from smearing.
Trivia Β· 40 Questions
Play β
Diagnose the Call
"No cool." That's the whole ticket. Twenty-four customers meet you in the driveway and hand you the answer without knowing it.
Quiz Β· 24 Calls
Play β
Plenum Crossword
The big metal box bolted to the equipment, named from the Latin for full. Twenty-five interlocking answers, SUBCOOLING to CONTACTOR.
Puzzle Β· 25 Answers
Play β
Worst Call of the Summer
The attic in August, the crawlspace, a frozen coil at 4:45 on a Friday. Eight tickets nobody wants. Pick the one you'd let ring.
Bracket Β· 8 Calls
Vote β
Line Set Connections
Sixteen tiles, four secret groups, three boards. You evacuate with a vacuum pump, and that is exactly the problem.
Connections Β· 3 Boards
Play β
Attic Ladder Crossclimb
One letter per rung. Solve, stack, then cap both ends β and one of the three reveals the tape you should never actually use on a duct.
Crossclimb Β· 3 Ladders
Play β
These are games, not a service manual. Gas piping, 240-volt power and pressurized refrigerant are licensed work β call somebody who does this for a living.