Show:
Gas Furnaces
HAVC Science
Commercial A/C Controls
Troubleshooting
History of HVAC
100
The manifold pressure of a L.P. fired furnace
11" w.c.
100
What causes the reversing valve to shift
Pressure
100

Air-to-air heat exchangers that can be used to introduce fresh air to the conditioned space are these.

What are ERV's or HRV's?

100

During the summer the last diagnostic tactic is this.

What is gauging up?

100

The Man,

The Myth,

The Mustache 

Who Is TIM?

200

Name two fuel source of a gas-fired furnace

What is L.P. & Natural Gas

200

This is a poor vapor barrier.

What is construction paper? 

200

On commercial one-story buildings this roof style is best used.

What is ponded?

200
If voltage is read across a fuse what does this indicate
The fuse is blown
200

According to a popular search engine on the world wide web, the first residential AC unit was installed in this year. 

When was 1914?

300
When fuel is burnt, it produces this harmful gas
Carbon Monoxide
300

The US Department of Energy (DOE) has developed guidelines for insulation based on this.

What are climate zones?

300

A zoned forced-air HVAC system provides zoning primarily by controlling

What are dampers?

300

This is a common effect of a frozen condenser. 

What is blocked air flow?

300

In the 1800's this was invented for heating a room.

What are Cast iron radiators?

400
Removes the flue gas from the heat exchanger chamber.
Draft
400

Occupants in a building can be a source of

What is latent and sensible heat

400

The purpose of motor limit controls

What is the protection of the motor?

400

By checking this formula, it will tell you this? 

G-L=SC

L-G=SH

What is Superheat & Subcool?

400
This company started as a sheet metal and plumbing company in this year 

Who Is DeHart, 1946

500
This component shuts the furnace off in the event of over-heating
High Temperature limit
500
After a "call for heat" has been made at the thermostat, this should energize the reversing valve. 

What is "O" or "B"?

500

A commercial HVAC system that is controlled by pressurized air.

What is a pneumatic control system?

500

On a "No Heat" call, this is most likely the issue when troubleshooting a furnace if the flames are ignited.  

What is a defective flame sensor/flame rectification

500

This style of floor heaters has been dated as far back as 1200 BC.

What is underfloor heating?