Santa Fe Impact155 Dehumidifier

Santa Fe Impact155 Dehumidifier

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Product Overview

Santa Fe Impact155 Dehumidifier, previously known as Santa Fe Max Dry Dual XT, is the most powerful dehumidifier that Santa Fe makes. All Santa Fe dehumidifiers work by using their refrigeration systems to collect the water from the surrounding air. The air is cooled so that the moisture condensates onto a coil, which collects and directs the water into the drain hose, by the force of gravity. The dehumidified air is then used to help with the cooling process before being reheated and released through the exhaust vents on the sides of the dehumidifier.

Comes with all the great features of the Santa Fe dehumidifiers:

  • Low Temperature Operation - Working at temperatures that other dehumidifiers just can't handle, the Santa Fe Impact155 keeps working diligently.
  • Auto Restart - All Santa Fe dehumidifiers have automatic restart capability after any power outage. They even keep all the settings.
  • Large Capacity - The Santa Fe Impact155 can remove a large amount of moisture from the air, up to 155 pints a day out of a 3600 sq. ft. area, doing the job of several competing dehumidifiers.
  • Superior Air Filtration - Using MERV-11 filters, the Santa Fe Max Dual Dry XT keeps working at full efficiency when other dehumidifiers would struggle on slowly.
  • High Energy Efficiency - All Santa Fe dehumidifiers exceed the Energy Star efficiency ratings.

How does Santa Fe prevent humidity from damaging your property? The Santa Fe dehumidifiers prevent mold, mildew and pests from ever growing, keeping your property safe from any damage these might cause and keep your home environment comfortable and healthy. 

Dehumidifiers are important because wet crawlspaces and basements are the main factor for the eventual destruction of floor joists, beams, insulation, and electrical and mechanical systems. Excessive moisture encourages the growth of mold on wood and on other organic material in crawl spaces. All these things lead to a large amount of damage to your property. This Impact155 dehumidifier will remove moisture from your basement or crawlspaces to prevent the growth of mildew, rust, mold, biological allergens, musty odors, bacteria and even dust mites and other pests. 

All Santa Fe dehumidifiers work by using their refrigeration systems to collect the water from the surrounding air. The air is cooled so that the moisture condensates onto a coil, which collects and directs the water into the drain hose, by the force of gravity. The dehumidified air is then used to help with the cooling process before being reheated and released through the exhaust vents on the sides of the dehumidifier.

With the danger of high humidity, it is very important to regulate the humidity in your basement/crawlspaces. Excess moisture encourages mold growth on organic material in crawlspaces and contributes to the destruction of floor joists, insulation, beams, and electrical and mechanical systems. Just attach a tube to the dehumidifier, run the tube to a drain to get rid of the water, plug the dehumidifier in and watch it clear the space of unwanted water.

The EPA recommends keeping humidity levels below 50%, to keep all those issues from occuring. Just attach a tube to the water output valve, place the tube where you want it to go, plug the dehumidifier in and watch it go. The dehumidifer works in all environments as well, including wine cellars, gun vaults, home libraries, car collections, and historical homes.

Two optional accessories provides the best flexibility in installation. 

If you need any accessories for the Santa Fe Impact155, we have it here for you.

Runs off of 920 watts on average and draws 7.3 amps while operating. The energy efficiency is 7.3 pints of water per kilowatt hour.

Features and Specs

For use in Basements, crawlspaces, wine cellars, gun vaults, home libraries, car collections, historical homes and other indoor humid areas.
Yield Holds 155 pints per day
Dimensions 20.25 inches wide by 21.75 inches high by 38 inches long and 140 lbs
Coverage Area 3,600 sq. ft.
Voltage 115 volts
Hose Length (in.) 5/8 inches by 96 inches
Warranty 6 Year Limited Warranty:
2 Years Full Warranty Parts and Labor
3 to 6 Years Component Warranty - including (Compressor, Evaporator Coil, and Condenser Coil)
Parts Included Santa Fe Impact155 Dehumidifier, a power cord, MERV-11 Air Filter, an 8-foot drain hose, 4 leveling feet and an owner's manual.
Shipping Weight 160.00 lbs
Manufacturer Santa Fe Dehumidifiers (Mfg. Number: 4031470)


Capacities for residential dehumidifers are measured in pints of water removed per day at standard conditions (80 degrees F and 60% RH) determined by the American Home Appliance Manufacturers. At these conditions, the capacity of the Santa Fe Impact155 is 155 pints per day as compared to 20 - 65 pints from standard residential units. However, most basements and crawlspaces are cooler than 80 degrees F so the water removal capacity of the standard unit will be lowered significantly. A large dehumidifier such as the Santa Fe Impact155 is necessary that moisture is removed at real world temperature of your crawlspace or basement to prevent mold, bacteria and mildew growth. This Santa Fe Impact155 is designed for these cooler applications.

Intended Application(s)
The Santa Fe Impact155 is intended for use in crawlspaces or basements: however, the unit can be placed in almost any residential setting where dehumidification is desired. Use in non-residential applications and pool areas may void warranty.
The Santa Fe Impact155 is designed to operate in temperatures between 56° and 95°F. In order to efficiently control humidity levels, the area in which the dehumidifier is to be operated must be free of water intrusion or excessive fresh (outside) air infiltration. Before installing the Santa Fe Impact155, water intrusion and air infiltration problems should be addressed.


Remove compressor shipping tie from the unit. Failure to remove shipping tie will cause excess vibration to be transmitted to the frame.

Remove Compressor Shipping Support

The Santa Fe Impact155 uses a compressor to power the refrigeration system. To protect the compressor and refrigeration system during shipping a plastic tie wrap secures it to the units frame. Remove the tie wrap by cutting the tie wrap and pulling from the unit as shown. After removing tie wrap, insert plastic plugs provided into the holes.


The Santa Fe Impact155  can be installed in a variety of locations to meet the owner’s needs; other considerations include:

1. Providing access to a 115 VAC power outlet (10' power cord is provided).
2. Locating near a floor or other suitable drain (8' drain hose included).
3. Mount 4" above drain.
4. Do not install the Santa Fe Impact155 with the exhaust of the unit within 1' of a wall or obstruction. Do not place the unit near open water.

No Ducting (Figure 1)
The simplest installation is to place the Santa Fe Impact155 with no ducting. To ensure optimal performance, the air inlet and the outlet of the unit must be at least 2' from walls and other obstructions to air flow. Recirculation of outlet air into inlet should be avoided as much as possible. 

Ducted Return and Supply (Figure 2)

Dehumidification performance can be modified by adding an return and/or supply duct to circulate air. For optimal drying, use return duct to draw warm, moist air from near the ceiling.

Remote Area, w/ Ducted Supply (Figure 3)

A simplified remote installation method than above uses ducting between the Santa Fe Impact155 discharge and the humid room; the Santa Fe Max Dry Dual XT inlet draws air from the room in which it’s located. This works well if there is an adequate air flow path between the two rooms; i.e. high door undercut, louvered door or wall grill. This eliminates the need to remote mount the humidity control. Before installing the dehumidifier in the manner described in section 4.2D (Fig. 4), call the factory for specific instructions if backdraft devices (i.e. hot water heaters) are present in the space to be dehumidified.

In A Remote Area, Ducted Return Only (Figure 4)

When the Santa Fe Impact155 is located in a room separate from the main area to be dehumidified, it may be desirable to dehumidify and/or slightly pressurize that room. Pressurization assures that open combustion devices do not backdraft. This can be prevented by installing a duct from the humid room to the Santa Fe Impact155 inlet and by allowing the Santa Fe Impact155 to discharge dehumidified air into the room in which it’s located. An adequate air flow path must exist between the two rooms for this method to work properly.

Electrical Requirements 

The Santa Fe Impact155 plugs into a common grounded outlet on a 110-120 VAC 15-Amp circuit. Use of a ground fault circuit interrupter (GFCI) protected circuit is recommended. The unit should not be used in areas prone to flooding. For proper drainage, the unit must be mounted so the drain outlet is at least 4" above the floor drain, and must be fully supported under the base.

Condensate (Water) Removal

The Santa Fe Impact155 drains via gravity, therefore, it does not have the ability to push condensate (water) upwards. The drain hose must run down towards the drain location. Condensate can be drained by using the 5/8” clear vinyl hose and the 3/4” threaded adapter provided. Ensure the threaded adapter is threaded in tightly. The Santa Fe Impact155 requires a drain trap. Creating a drain trap allows a small amount of water to build up in the trap area of the clear hose. This prevents air from back flowing through the hose and into the dehumidifier; essentially causing the unit to backflow water out of the corners of the machine.  Position the trap in the hose approximately 8"-10” from the dehumidifier and make sure the highest point of the trap is still at least 2”below the black drain port adapter on the dehumidifier. If the highest point of the trap is above the drain port, water will back flow into the dehumidifier. Check the hose regularly to ensure water is draining properly. Use care to keep the hose as flat to the floor as possible after your trap is in place. Be sure the hose is not kinked or otherwise restricted so water can pass through the hose freely. Improper installation of the drain hose may result in water leakage. If the Santa Fe Impact155 is located too far from the floor drain and the provided hose does not reach, you may use a 1/2” PVC rigid pipe to extend the drain. Rigid PVC tubing is readily available from your local hardware store. Be sure the extension is at a down-word slope to the drain. An optional condensate pump kit may be installed if lift is required to remove condensate.


Supply Duct Kit (P/N 4028607)

A factory designed supply duct kit can be purchased to accept 10" ducting to both outlets of the Santa Fe Impact155.

Return Duct Kit (P/N 4028610)

A factory designed return duct kit can be purchased to accept 12" ducting. C


Humidity Control Adjustment 

The humidity control is an adjustable switch that closes when the relative humidity of the air in which it is located rises to the dial set point. It opens when the RH drops 4 to 6% below the set point.


NOTE: Do not operate the unit without the filter or with a less effective filter. The heat exchange coils inside the unit could become clogged and require disassembly to clean.

Air Filter

The Santa Fe Impact155 ships with a standard MERV 11 efficient pleated fabric filter. This should be checked every three to six months. The pleated fabric filter can generally be vacuumed clean several times before needing replacement. Operating the unit with a dirty filter will reduce dehumidifier capacity and efficiency and may cause the compressor to cycle on and off unnecessarily. Replacement filters can be ordered from your dealer or online.


Servicing the Santa Fe Impact155 with its high pressure refrigerant system and high voltage circuitry presents a health hazard which could result in death, serious bodily injury, and/or property damage. Only qualified service people should service this unit.

Technical Description

The Santa Fe Impact155 uses a refrigeration system similar to an air conditioner’s to remove heat and moisture from incoming air, and add heat to the air that is discharged. Hot, high pressure refrigerant gas is routed from the compressor to the condenser coil. The refrigerant is cooled and condensed by giving up its heat to the air that is about to be discharged from the unit. The refrigerant liquid then passes through a filter/drier and capillary tubing which cause the refrigerant pressure and temperature to drop. It next enters the evaporator coil where it absorbs heat from the incoming air and evaporates. The evaporator operates in a flooded condition, which means that all the evaporator tubes contain liquid refrigerant during normal operation. A flooded evaporator should maintain constant pressure and temperature across the entire coil, from inlet to outlet. The mixture of gas and liquid refrigerant enter the accumulator after leaving the evaporator coil. The accumulator prevents any liquid refrigerant from reaching the compressor. The compressor evacuates the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature gas to repeat the process.



If the unit does not work properly, please check the following:
— Is the unit unplugged?
— Is power to outlet on? (check switch, if applicable)
— Is circuit breaker tripped?
— Is humidity control set? (turn to “ON”)
— Is air flow restricted? (check air filters and grill)
If none of the above, call dealer or 1-800-533-7533, Ext. 8459.

No dehumidification. Neither impeller, nor compressor run with fan switch AUTO.
1. Unit unplugged or no power to outlet, circuit breaker tripped.
2. Humidity control set to “Humid” setting.
3. Loose connection in internal wiring.
4. Humidity control is defective.

No dehumidification. Compressor does not run but impeller runs with fan switch AUTO and humidity control turned to ON.
1. Defrost thermostat open, ambient temperature too low.
2. Loose connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor or compressor run capacitor.

Impeller runs with fan switch AUTO but compressor cycles on & off.
1. Low ambient temperature and/or humidity causing unit to cycle through defrost mode.
2. Defrost thermostat defective.
3. Defective compressor overload.
4. Defective compressor.n Impeller does not run with fan switch in either position.

Compressor runs briefly but cycles on and off.
1. Loose connection in impeller circuit.
2. Obstruction prevents impeller rotation.
3. Defective impeller.
4. Defective impeller switch.

Evaporator coil frosted continuously, low dehumidifying capacity.
1. Dirty air filter or air flow restricted.
2. Defrost thermostat loose or defective.
3. Low refrigerant charge.
If none of the above has fixed the issue, call technical support at 1-800-533-7533, Ext. 8459.

Refer to Manual for full instructions.

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Questions & Answers

Have a question about this product?
What are the operating cost yearly or monthly of the Santa Fe Max Dry Dual XT? How much electricity does it unit use?

For an average of how much electricity the Santa Fe Max Dry Dual XT unit would use,  we would recommending consulting with Sante Fe Manufacturer directly. You can reach Sante Fe at 800-533-7533.

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