MRCOOL® Monoblock MTHP Series
The MRCOOL® Monoblock MTHP Series is designed to deliver reliable, energy-efficient heating and cooling for small spaces. Built for year-round comfort, this system maintains consistent indoor temperatures while helping reduce energy use and manage monthly utility costs. Its all-in-one design eliminates the need for a traditional outdoor condenser, with all components housed within a single wall-mounted indoor unit, making it an excellent choice for installations where space is limited.
Simple and DIY-Friendly
Installation is intentionally simple and DIY-friendly, requiring no refrigerant handling or certified HVAC technician. DC inverter technology allows the system to operate at variable speeds instead of frequent on-off cycling, resulting in smoother temperature control, quieter operation, improved energy efficiency, and reduced component wear. A durable full metal body and housing panel help ensure long-term reliability. The Monoblock MTHP uses R-32 refrigerant, a lower-GWP option designed to reduce environmental impact without compromising performance.
Intuitive Operation
Operation is intuitive through a bright LED display, with optional WiFi control via the MRCOOL® Connect app. Features including cooling, heating, fan, and dry modes, along with swing, silent, and timer functions, allow the system to adapt easily to changing comfort needs. A self-evaporative system with water-full alarms and auto-stop protection supports efficient, worry-free operation. The system includes a 1-year replacement warranty and 1-year remote warranty for added peace of mind.
- Cooling Capacity (BTU): 10,000
- Heating Capacity (BTU): 9,000
- Tonnage: 0.83
- SEER2: 15
- EER2: 9.9
- HSPF2: 7.5
- Voltage (V): 115
- Phase: 1 Cycle: 60
- Max Fuse Breaker (A): 20
- Min Circuit Ampacity (A): 13
- Mount Type: Wall Color: White
- Refrigerant Type: R-32
- Refrigerant Volume: 19.4 oz
- Decibel Rating (Low): 32 dBA
- Decibel Rating (High): 46 dBA
- Compressor Type: Rotary
- Condenser Fan Motor Type: DC
- Blower Motor Type: DC
- Inverter: Yes
- Filter Type: Reusable
- Oscillation: Yes
- Fan Only Option: Yes
- Quiet Mode: Yes
- Smart Features: WiFi / App Compatible (iOS & Android)
- Controls: Remote included
- Auxiliary Heater Included: No
- Auxiliary Heater Available: No
- Warranty: 1 year parts, 1 year remote
- Safety / Compliance: Prop 65 warning applies
- Electrical/Material Notes: Contains electronics, chemicals, compressed gas
- Dimensions (Net): 39.4 × 23.1 × 8.07 in
Why Buy MRCOOL MDM10115D Monoblock MTHP Smart Built-In Air Conditioner
- True DIY Installation: Self-contained, all-in-one design requires no outdoor condenser, refrigerant handling, or certified HVAC technician—just two wall penetrations for venting and a standard wall socket.
- Plug-and-Play Power: Runs on standard 115V household current, eliminating the need for expensive electrical panel upgrades or dedicated 230V wiring.
- Energy-Efficient Inverter Technology: Features a variable-speed DC inverter that maintains precise temperatures, lowers utility bills, and reduces component wear compared to standard on/off systems.
- Ultra-Quiet Operation: Sound levels drop as low as 32 dBA in quiet mode, making it far quieter than traditional window AC units or PTACs.
- Year-Round Comfort: Delivers both high-performance cooling and heating in a single sleek unit designed for spaces up to 450 sq. ft.
- Smart Controls: Includes an intuitive LED interface, full-function remote, and built-in WiFi compatibility for smartphone control via the MRCOOL® Connect app.
- Eco-Friendly & Maintenance-Free Design: Operates on low-GWP R-32 refrigerant and utilizes a self-evaporative system that recycles condensate water under normal cooling conditions.
- Durable Construction: Built with a sturdy full-metal housing panel to withstand years of residential use.
Frequently Asked Questions
Q: What is the MRCOOL® Monoblock MTHP?
A: It is an all-in-one, ductless heat pump that handles both heating and cooling without needing an outdoor compressor. The entire system is housed inside a single wall-mounted indoor unit.
Q: Does the MDM10115D require an outdoor condenser unit?
A: No. Unlike traditional split-system air conditioners or mini-splits, the Monoblock integrates all cooling, heating, and compressor components inside the indoor wall chassis.
Q: How does the system vent to the outside?
A: It vents directly through an exterior wall using two 6.4-inch wall sleeves—one for fresh air intake and one for hot exhaust air—plus a small condensate drain line.
Q: Can I install the unit myself without an HVAC technician?
A: Yes. Because the refrigerant loop is factory sealed inside the unit, installation does not involve flaring copper lines, pulling vacuums, or handling refrigerant. No EPA certification or licensed HVAC technician is required.
Q: What electrical supply is needed to run the unit?
A: The MDM10115D operates on standard 115V / 60Hz household power and plugs directly into a standard 3-prong wall outlet (NEMA 5-15P).
Q: What size space can the 10,000 BTU model cool and heat?
A: It is designed to efficiently cool and heat single rooms up to 400 to 450 square feet, making it ideal for bedrooms, sunrooms, home offices, converted garages, or apartments.
Q: How loud is the unit during operation?
A: The unit features variable-speed inverter technology and operates between 32 dBA (in quiet mode) and 47 dBA. This is significantly quieter than most window air conditioners or PTAC wall units.
Q: How is condensate managed during cooling?
A: In cooling mode, the unit utilizes a self-evaporative design that recycles condensate water over the internal coils. In high-humidity environments or during heat mode operation, excess water drains out through the exterior drain tube.
Q: What smart controls and connectivity options are available?
A: The unit can be operated via its integrated front LED display, the included handheld remote control, or remotely through the MRCOOL® Connect smartphone app using 2.4 GHz WiFi.
Q: What type of refrigerant does the MDM10115D use?
A: It uses pre-charged R-32 refrigerant, a modern, low-Global Warming Potential (GWP) solution designed for energy efficiency and reduced environmental impact.
Q: What warranty coverage does MRCOOL® provide for this model?
A: The unit comes backed by a 1-year replacement warranty along with a 1-year remote warranty.
Pros and Cons of MRCOOL MDM10115D Monoblock MTHP Smart Built-In Air Conditioner
Pros
- No Outdoor Condenser Needed: The all-in-one chassis mounts completely on an interior wall, making it ideal for high-rises, historic homes, or places with strict HOA restrictions against exterior equipment.
- True DIY Installation: Factory-sealed refrigerant means no copper line flaring, vacuum pulling, or licensed HVAC technician required.
- Standard 115V Plug: Connects directly into a standard 3-prong household outlet, eliminating the need for expensive 230V electrical upgrades.
- Whisper-Quiet Operation: Uses DC inverter technology to run as low as 32 dBA, significantly quieter than traditional window AC units or PTACs.
- Year-Round Comfort: Provides both 10,000 BTU cooling and 10,000 BTU heat pump warming in a single unit.
- Smart Controls: Includes WiFi connectivity out of the box for remote operation via the MRCOOL® Connect app, alongside an LED display and remote control.
- Sleek Aesthetics: Replaces ugly window units or bulky PTAC sleeves with a modern, streamlined wall appliance.
Cons
- Exterior Wall Requirement: Must be installed on an exterior wall to allow for the two 6.4-inch ventilation duct holes and drain pipe.
- Large Wall Penetrations: Drilling two 6.5-inch holes through exterior siding, brick, or stucco requires heavy-duty tools (like a core drill) and permanent modifications to the wall.
- Limited Sizing Options: At 10,000 BTU, it is strictly designed for single rooms up to 450 sq. ft. and cannot serve as a whole-home solution.
- Higher Initial Cost than Window Units: Significantly more expensive up front than standard 10,000 BTU window ACs or portable units.
- Reduced Heat Pump Efficiency in Extreme Cold: As with most standard heat pumps, heating performance can drop when outdoor temperatures plunge well below freezing.
Conclusion
The MRCOOL® Monoblock MDM10115D is a standout solution for homeowners, renters, and builders looking for efficient, permanent heating and cooling without the hassle of installing a traditional outdoor mini-split compressor. While the up-front cost is higher than a portable or window AC and installation requires cutting two large vent holes through an exterior wall, its whisper-quiet operation, standard 115V plug-and-play power, sleek interior design, and true DIY setup make it one of the most practical upgrades available for sunrooms, home offices, converted garages, and space-constrained apartments.
Specifications
| Certifications | |
|---|---|
| Energy Star | No |
| Appearance | |
|---|---|
| Color | White |
| Appliance Category | Air Conditioner |
| Brands | |
|---|---|
| Brand | MRCOOL |
| Series | Monoblock MTHP |
| Dimensions | |
|---|---|
| Height | 23 1/10" |
| Width | 39 2/5" |
| Depth | 8 7/100" |
| Style | |
|---|---|
| Type | Through the Wall |
| Capacity | |
|---|---|
| Nominal BTU Capacity | 10000 BTU |
| Cooling Area (sq. ft.) | 450 |
| Cooling BTU Capacity | 10000 |
| SEER | 15 |
| Heating BTU Capacity | 9000 |
| Smart Features | |
|---|---|
| Works with Google Assistant | Yes |
| Works with Alexa | Yes |
| Smart Appliance | Yes |
| Wi-Fi | Yes |
| Warranty | |
|---|---|
| Warranty | 1 Year Parts and Remote |
| Technical Details | |
|---|---|
| Voltage | 115 Volts |
| Amps | 9.8 |
| Plug Type | 5-15P |
| Features | |
|---|---|
| Filter Type | Washable |
| Provides Heating | Yes |
| Heat | Heat Pump |
| Chassis Type | Thru the Wall |
| Remote Controller | Included |
| Corrosion Protection | No |
| Others | |
|---|---|
| Color Family | White |