Overview
The 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Split System is the innovative heating and cooling tool you need to stay warm in winter, cool in summer, and energy efficient every day of the year. Unlike other conventional heat pump split systems, the Universal relies on a DC inverter compressor to modulate performance based on fluctuating demand. It can scale capacity up as necessary or reduce it in mild weather. It can save you time, money, and, over the long term, a lot of headache.
MrCool Universal Heat Pump Continues to Heat in Temperatures As Low As -22
So what is it that makes the 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Split System so very special? As we mentioned, the key is the sophisticated DC inverter compressor and intelligent internal control system. The ability to operate at reduced capacity for long periods saves serious money. Likewise, the ability to scale up performance as the outside temperature fluctuates delivers significant versatility. That's why the Universal can deliver 100% cooling capacity at temperatures as high as 110 degrees Fahrenheit, 100% heating performance at minus 5 degrees, and continue producing heat down to minus 22.
Serious performance capability isn't the only thing the 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Split System comes with. The condenser features an auto-reset internal overload protector, direct drive fan motor, inner groove copper tube-aluminum fin, gold fin corrosion protection, automatic defrost, electronic expansion valve, and a condenser with both a compact footprint and a shallow profile. The air handler comes with electric box assembly, fan motor, secondary drain pan, primary drain pan, and the capacity to accommodate an auxiliary heat kit.
No-Vac Quick Connect Line Set Compatible!

One of the most exciting aspects of the 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Split System is the MrCool No-Vac Quick Connect Line Set. This unique line is kink resistant, precharged with R410a refrigerant, and uses Quick Connect fittings. These specialized fittings mean that installing the Universal Split System with a No-Vac Quick Connect Line Set can be performed without specialized tools. Basically, the No-Vac lines simply plug into the condenser and air handler. No cutting, no brazing, no vacuuming, and no charging is required. It reduces hours of installation work down to minutes.
Purchase the MrCool Universal Quick Connect Line Set Here
The 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Split System is, of course, provided with serious warranty protection from the manufacturer. Homeowners who properly register the Universal within 60 days of installation instantly receive a 10-Year Limited Parts Warranty. When you buy from Ingrams you also get our knowledgeable tech support for any of your needs before, during, and after the product is installed. Order now!
MrCool Universal Heat Pump Replaces Need for Gas Furnace
2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Condenser - MDUO18024036

The 2 to 3 Ton 20 SEER MrCool Universal Central Heat Pump Condenser is a cutting edge HVAC technology from an innovation leader. The sophisticated tech inside this unit both regulates the temperature of your home and controls the compressor motor speed simultaneously. It eliminates extreme fluctuations in the operating load and extends the unit’s life.
- 2 Ton Mode: 20 SEER, 3 Ton Mode: 18 SEER
- Ultra Wide Operating Temperature Range
- Gas Furnace Not Required
- Compatible with any third party air handler and thermostat including WiFi/Nest/Honeywell
- Rapid cooling and heating
- Internal Fan Blade Creates Low Noise
- Factory Charged R410
- ETL and AHRI certified
2 to 3 Ton MrCool Universal Air Handler - MDUI18024036

The 2 to 3 Ton MrCool Universal Air Handler is designed for maximum compatibility with the MrCool Universal 2 to 3 Ton Condenser. Properly paired, this air handler can deliver superior home comfort performance in summer, winter, and every season in between. It is ideal for homeowners who want to boost operating efficiency while reducing their dependence on increasingly expensive resources like heating oil. Plus, it is both a quiet and safe solution.
- 2 Ton Mode: 20 SEER, 3 Ton Mode: 18 SEER
- Ultra Wide Operating Temperature Range
- Quick Connect, Flared, & Sweat fittings allow for universal installation
- Multi-positional installation (compatible with upflow and horizontal applications)
- Accommodates up to a 10kW Backup Heat Strip
- Factory Charged R410
- ETL and AHRI certified
Warranty Terms
For a full description of all warranties applicable to this product as well as individual manufacturer requirements, please review the manufacturer's consumer brochure and/or product warranty documents. Online warranty registration must be completed within 60 days of installation. Due to state laws, online registration is not required in California or Quebec. Call for warranty availability on scratch & dent and surplus items.
Installation of any product must comply with all applicable codes and regulations. The service of a certified and trained electrical technician may be required for the installation process.
Specifications
Model | MDU18024036 |
---|---|
UPC | 810035931107 |
AHRI Number | 210410117 |
Bundle Avg Coverage Area | 1,250 - 1,500 Sq Ft |
Bundle Cooling Capacity | 2 Ton, 2.5 Ton, 3 Ton |
Bundle Cooling Efficiency | 19 SEER and Above |
EER | 12.5 (2 Ton), 11 (3 Ton) |
Heat Pump Efficiency (HSPF) | 10.5 |
Series | Universal |
Region Compatibility | Nationwide |
California Residents | see Prop 65 WARNING |
MDUO18024036 Specifications:
Model | MDUO18024036 |
---|---|
UPC | 810512032921 |
Avg Coverage Area | 1,000 - 1,500 Sq Ft |
Compressor | Inverter |
Cooling Capacity | 1.5 Ton, 2 Ton, 2.5 Ton, 3 Ton |
Electrical Phase | 1-Phase |
Heat Pump Efficiency (HSPF) | 10.5 |
Line Set Connection Type | Quick Connect, Flared, or Sweat |
Liquid Line Size | 3/8 inch |
Max Overcurrent Protection | 40 amps |
Primary Heating Capacity | 24,000 - 36,000 BTU |
Product Height (in) | 32.3 |
Product Length (in) | 18 |
Product Width (in) | 37 |
Refrigerant | R-410a |
Cooling Efficiency | 19 SEER and Above |
Series | Universal |
Suction Line Size | 3/4 inch |
System Application Type | Central Split Systems |
Voltage | 240 |
Warranty | 10 Year Parts |
Weight (lbs) | 236.0000 |
Region Compatibility | Nationwide |
MDUI18024036 Specifications:
Model | MDUI18024036 |
---|---|
UPC | 810512032983 |
Air Flow Direction | Horizontal, Upflow |
Configuration | Floor Mounted |
Blower Motor | High Efficiency |
Cooling Capacity | 2 Ton, 2.5 Ton, 3 Ton |
Electrical Phase | 1-Phase |
Heat Strip Compatibility | Up to 10 kW |
Line Set Connection Type | Quick Connect, Flared, or Sweat |
Liquid Line Size | 3/8 inch |
Max Overcurrent Protection | 15 amps |
Product Height (in) | 48.25 |
Product Length (in) | 21.3 |
Product Width (in) | 21.3 |
Series | Universal |
Suction Line Size | 3/4 inch |
System Application Type | Central Split Systems |
Voltage | 240 |
Warranty | 10 Year Parts |
Weight (lbs) | 156.5000 |
Accessories
Reviews
Q & A
Second question - you answered in QA that 3 ton unit has a CFM1000? Shouldn't a 3 ton unit have a minimum CFM 1200 and on most heat pumps run around 1350?
What should be my "circuit breaker" ? 30 amps or 50 amps?
Indoor installation manual on page 17 is stated : Max Over current protector=15 Amps , is that means my Circuit breaker should be 15 Amps ?
Thank you.
Install looks simple enough, but i've not seen such a small condenser on a three ton.
The 2 1/2-ton and 3-ton units both are 18 SEER? How does this work? Are the prices the same? How much and how long it'll take to ship to PA 19460 area?
Thank you.
Sam
and i want a really quiet unit , how loud is the noise of this unit?
How long is the shipping to 33774
2. I would like to zone the system (two zones) without using a bypass damper (relying on the variable speed motor to adjust the air volume). Do you sell a zone panel/motorized dampers/thermostats that would accomplish this? Please advise what I need for a two zone system (each zone is approximately 700 sq. ft.)
3. Is there a knock down plenum you sell for this air handler installed in upflow/vertical configuration?
Thanks
The question was asked about the AHU needing to be 8' above ground level because they wanted to install in crawlspace. The answer was if coil is even with or below level of condenser then an oil control bend is needed. So please confirm this can be installed in a crawlspace with ahu below grade with the oil control bend and can this be done with the precharged flexible line sets? The detail in the installation booklet is very vague in this instance for precharged line sets. Is there a better detail?
Your Answer:
BEST ANSWER: Yes that is correct- the air handler can be installed below the condenser with an oil control loop. It is not easy to bend the pre charged line but it can be done. It would be best to have an experienced installer handle that part.
My question is this:
In the Installation Manual/Owner’s Manual for the Universal Series DC Inverter / Condenser MDUO18024036 at the bottom of page 14 it states
“For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 23”
Page 23 mentions nothing about a bend in the line but on page 24 where it states:
"If the outdoor unit is located on a level higher than the indoor unit" it refers to Fig. 2.22 that shows a Non-return bend. I would like to verify that in this situation that the "Non-Return Bend" is the only extra bend needed and if that is correct is there a diagram that shows the dimensions that the bend should follow as they are described on page 15 when using a "Conventional Line Set Installation". Sorry for the long question but looking for some clarification.
Or can the cabinet take right-angle return air?
Thanks
Thank you
1. Can this cool 1590 sq ft in orlando. I am a little concerned about the 1000 cpm. What is the cpm on the 4-5 ton unit?
2. This will be a regular vertical install with the air handler about 2 feet off the floor in a closet. The compressor will be on a pad outside at ground level. The line set however, will go up thru the attic and down the side of the house to the compressor. Is there any special thing that needs to be done?
Thank you.
My system is a Heat pump with gas backup. The Heat pump works great until it gets below freezing then the gas comes on and just had to pay 480.00 for about a month and half on top of another 120,electric bill.
Gas is now 2.90 a gallon.
I have a cape cod house 1800 square feet with one bed upstairs and a loft with vaulted ceiling.
Just would like to explore some options.
Example situation: -15 F degrees outside for 24 hours or more. Heat pump has been running for 30 minutes, but temperature set point is not achieved (leaving air temperature from the air handler is not high enough) => air handler will turn on the electric heat strip.
My example is based on how long the heat pump has been running and the air handler leaving air temperature. Are those data points what are used by the air handler for it to decide when to turn on the electric heat strip?
Thnx
Can you supply a correct wiring diagram for a 2/3 ton complete thermostat wiring diagram without a heat strip?
T10 thermostat allows to configure less frequent cycling (range of 1-12 cycles per hour).
Background: I've got the outdoor unit configured as 24k BTU, and air handler at 2-Ton Medium Fan speed.
It appears as though compressor never reaches the max BTU output before the T10 thermostat temperature is satisfied and gets cut off. I am monitoring the power consumption using CT clamps and can see that compressor gradually (over the course of 6-8 minutes) increases its frequency and power consumption and reaches about 1260W (based on submittals at 50℉ outdoor ambient temperature the max BTU output is 26kBTU at 1950Watt), which corresponds to roughly 65% of the max BTU capacity.
So question is - would such frequent cycling of the compressor hurt it?
Can I use the MR Cool universal Central heat pump under a new gas up flow furnace? does Mr Cool have a DYI evap. coil?
Finally got this system installed, works great, and it is very quiet.
Can the unit be set for 2.5TON?
Does the Universal MR. Cool come in a 5 ton? What is the SEER ratings for it and the prices? Does it use a Reversing Valve? I didn't see it in the pictures provided for the 4-5 Ton unit.
By the way I was very impressed with the video and the performance of the Heat Pump at such low temperatures. Great job on the design of the system even without the heat strip in the Air Handler.
Thanks for your efforts in a speedy reply and Merry Christmas to all of you. I love how you help the home owner with the DIY approach.
How do you change the units to be the other ton settings?
Per the Specifications tab on this listing:
Bundle Cooling Capacity is 2 Ton, 2.5 Ton, 3 Ton
Cooling Capacity on MDUO18024036 (condenser) is 1.5 Ton, 2 Ton, 2.5 Ton, 3 Ton
Cooling Capacity on MDUI18024036 (air handler) is 2 Ton, 2.5 Ton, 3 Ton
================================
Do these units use an electronic TXV valve?
-17
BEST ANSWER: No, the TXV for the Universal is still mechanical.
Kyle Davis Expert on Jan 8, 2020
What advice can you give to me?
Sincerely,
Frederick Connelly
Horizontal right flow would require moving the drain pan from one side of the AH to the opposite side. The location of the black drain plugs in the cabinet seem to indicate that horizontal right flow is possible but there is nothing in the installation manual that describes this. I've also read all the questions here and don't see where this is mentioned.