TETCO ES4 Series Vertical Packaged unit image 5 year warranty

ES4 Series Vertical Packaged

The award-winning TETCO ES4 Vertical Packaged unit is packed full of innovative ideas never before seen in a geothermal unit. The result is a geothermal system that provides the ultimate in comfort, savings and satisfaction.


  • All aluminum microchannel air coil eliminates corrosion and increases unit's life expectancy
  • Composite, silver ion anti-microbial drain pan
  • Copeland® UltraTech® two-stage scroll compressor
  • High-style white powder coated steel cabinet
  • Removeable panels for easy access
  • Flow switch protected
  • Digital controls
  • Standard hot water generator (desuperheater)
  • ECM blower motors
  • Foamed-in coaxial heat exchanger
  • 1" FPT fittings
  • Multi-positional cabinet


Model Capacity Cooling Heating
Btu/hr EER Btu/hr COP
TXT024 Full Load 27,200 20.3 19,800 4.3
Part Load 21,400 29.1 16,600 4.8
TXT036 Full Load 38,900 18.3 29,200 4.2
Part Load 29,900 27.0 23,200 4.6
TXT048 Full Load 49,000 17.1 38,200 3.9
Part Load 37,400 24.1 29,700 4.3
TXT060 Full Load 63,000 17.8 47,700 3.7
Part Load 49,000 24.9 38,600 4.3
TXT072 Full Load 71,100 17.1 55,900 3.6
Part Load 57,500 23.0 46,700 4.1
Unit Notes
  • Rated in accordance with ISO Standard 13256-1, which includes pump penalties.
  • Heating capacities based on 68.0°F DB, 59.0°F WB entering air temperature.
  • Cooling capacities based on 80.6°F DB, 66.2°F WB entering air temperature.
  • Entering water temperatures Full Load: 32°F heating / 77°F cooling.
  • Entering water temperatures Part Load: 41°F heating / 68°F cooling.


Programmable thermostat

Keeps the home more comfortable by operating the unit on a set schedule and temperature range. This also saves on energy costs by setting the unit back while the home is unoccupied.

Non-programmable thermostat

Designed to take maximum advantage of the multi-stage functionality of the unit. This allows the unit to achieve maximum savings by only operating at the right range to match the current weather.

Auxiliary internal electric heater

Adds that little bit of extra heat on those few coldest days. Also helps to balance the system size by balancing out those few extreme days. With a standard stab-in design, you don't have to drop the blower to install.

Auxiliary external electric heater

Air duct installed unit to add extra heat on the coldest days.

Flow centers - pressurized

Circulates the fluid through the unit and loop field.

Flow center - non-pressurized

Circulates the fluid through the unit and the geothermal loop field. This type of system uses an expansion tank that can be topped off should the loop require it due to thermal expansion.

EWC zone control

These highly sophisticated controls work with dampers in the ductwork to create multiple zones throughout the house. You can utilize one unit, but have different temperatures in each zone. The control panel controls both the unit, and the zone dampers.

Unit air pad (plastic or foam)

The unit air pad creates a buffer between the unit and the home. This buffer prevents any vibration from the unit to be transmitted into the home which improves the already quiet operation of the unit.

Electrostatic filter (washable)

This type of filter is a permanent media filter that can be washed from time to time as needed. This eliminates the need to buy new filters.

Electronic 24 volt air cleaner

This type of filter uses an electrically charged media to increase filtration performance. This improves indoor air quality by removing more particles from the airstream. This filter requires the occasional media replacement.

Disposable pleated filter

This type of filter uses a pleated media to remove dust and other particles from the air stream. It is important to check these filters regularly and replace them as needed.

Extended warranty

Adds that extra peace of mind by extending the standard warranty to a full 10 years on parts and labor.

Consumer purchase plans

With a wide variety of payment options and terms, our consumer payment plans make installing a geothermal system easier and more cost effective. By deferring your initial payments out, you can start enjoying your new system earlier and take time to obtain many of the various rebates and tax credits offered.