Trane Air Handler AHU Electric Duct Heater | HVAC Heating & Cooling

by | Air Handlers | 0 comments

Trane Air Handler AHU Electric Duct Heater

Trane Air Handler AHU with Electric Duct Heater

Trane Air Handler AHU Electric Duct Heater - This Trane air handling unit photo shows a Trane AHU with an electric duct heater above the Trane air handler in the supply duct. In places where natural gas is not available and propane LP gas is impractical or not wanted. Electric heat makes a good source of heating. This electric duct heater is situated on the supply side of the air handler. Furthermore, many duct heaters are installed inside the air handler. (more…)

TXV or Thermostatic Expansion Valve | Refrigeration for HVAC

by | Refrigeration | 8 comments

TXV or Thermostatic Expansion Valve are used in air conditioners and heat pumps to meter refrigerant.

TXV or Thermostatic Expansion Valve

The TXV or Thermostatic Expansion Valve is preferred over other refrigeration metering devices because it only allows a specified amount of refrigerant to flow based on demand. Any type of refrigeration metering device creates a pressure drop in the refrigerant and with a pressure drop of the refrigerant a temperature drop also occurs.

This temperature is necessary to drop the refrigerant down to temperature lower than ambient temperatures inside the structure being cooled. This allows the refrigerant to absorb the heat contained in the air passing over the evaporator coil. (more…)