Friedrich WallMaster Series 11,000 BTU Smart Energy Star Through-the-Wall Air Conditioner with Inverter, 3 Fan Speeds & Remote Control - Cool Grey
Key Features
- Cooling BTU: 11000
- Replacement Sleeve Model: WSEZ
- Power Requirements: 110 Volt 15 or 20 Amp Circuit (Parallel Plug)
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Friedrich WallMaster Series 11,000 BTU Smart Energy Star Through-the-Wall Air Conditioner with Inverter, 3 Fan Speeds & Remote Control - Cool Grey
$1,199.97
About this Item
The Friedrich WallMaster Smart Through-the-Wall Air Conditioner is designed to provide precise and customizable comfort while maximizing energy efficiency. As the only perfect fit for existing 27" sleeves, the WallMaster seamlessly replaces old units, ensuring a hassle-free installation. With a commercial-grade, durable design, it performs exceptionally even in extreme conditions, making it ideal for both residential and commercial applications.
Fredrich's Precision Inverter compressor adjusts up or down based on need, providing the user precise temperature control, exceptional energy efficiencies, and dependably quiet operation. Additionally, the Soft-Start technology starts the compressor with a slow ramp up, optimizing energy savings and reducing compressor strain at start up compared to the frequent on/off operation of traditional units. The QuietMaster Technology ensures whisper-quiet operation, reducing noise levels significantly compared to traditional air conditioners. Built-in Wi-Fi connectivity allows users to control settings remotely via the app or voice commands with Amazon Alexa and Google Home.
Committed to sustainability, WallMaster models use R-32 refrigerant, reducing environmental impact while maintaining exceptional performance. ENERGY STAR certified models contribute to reducing your environmental footprint while lowering energy costs. Whether for a small room or a larger space, Friedrich WallMaster provides the cooling power needed with industry-leading innovation and reliability.
Fredrich's Precision Inverter compressor adjusts up or down based on need, providing the user precise temperature control, exceptional energy efficiencies, and dependably quiet operation. Additionally, the Soft-Start technology starts the compressor with a slow ramp up, optimizing energy savings and reducing compressor strain at start up compared to the frequent on/off operation of traditional units. The QuietMaster Technology ensures whisper-quiet operation, reducing noise levels significantly compared to traditional air conditioners. Built-in Wi-Fi connectivity allows users to control settings remotely via the app or voice commands with Amazon Alexa and Google Home.
Committed to sustainability, WallMaster models use R-32 refrigerant, reducing environmental impact while maintaining exceptional performance. ENERGY STAR certified models contribute to reducing your environmental footprint while lowering energy costs. Whether for a small room or a larger space, Friedrich WallMaster provides the cooling power needed with industry-leading innovation and reliability.
Custom Comfort, Perfect Fit - Engineered for Superior Performance

Energy-Saving Technology:
Precision Inverter compressor adjusts automatically for maximum efficiency and lower energy bills.
Quiet Operation:
QuietMaster Technology reduces noise with vibration-isolating design and high-qualify materials.
Perfect Fit Replacement:
The only air conditioner designed to fit existing 27" sleeves, ensuring seamless installation.
Uncompromising Durability:
Prioritizing quality by using commercial-grade materials.
Smart Control:
Built-in Wi-Fi connectivity for remote control via the app and voice command compatibility with Amazon Alexa and Google Home.
ENERGY STAR Certified:
Energy Star Certified and Energy Star Most Efficient models available.

Energy-Saving Technology:
Precision Inverter compressor adjusts automatically for maximum efficiency and lower energy bills.
Quiet Operation:
QuietMaster Technology reduces noise with vibration-isolating design and high-quality materials.
Perfect Fit Replacement:
The only air conditioner designed to fit existing 27" sleeves, ensuring seamless installation.

Perfect Fit Replacement:
The only air conditioner designed to fit existing 27" sleeves, ensuring seamless installation.
Uncompromising Durability:
Prioritizing quality by using commercial-grade materials.
ENERGY STAR Certified:
Energy Star Certified and Energy Star Most Efficient models available.
Since its founding in 1883, Friedrich has had one manufacturing standard - quality without compromise. The highest quality components and materials are used to make products that are known for exceptional quality, rugged durability and excellent energy efficiency. Friedrich is recognized as the leading brand of specialty air conditioning products, offering differentiated solutions for indoor air comfort. Friedrich's expansive lines of room air conditioning products offer solutions for residential, commercial, hospitality, multi - family and hazardous location applications. Whether the application is a single room or a large facility, we have the cooling and heating solutions you need with the convenience features, performance, capacities, and energy savings your customers want.
Product Height
15.75 Inches
Product Width
26.5 Inches
Product Depth
21 Inches
Product Weight (lbs.)
90 Lb(s)
Overall Height with Sleeve (in.)
-
Overall Depth with Sleeve (in.)
-
Overall Width with Sleeve (in.)
-
Color
Cool Grey
Series
WallMaster
Type
Wall
Room Size
Medium
Cooling BTU
11000 BTU
Cooling Speeds
3
Number of Fan Speeds
3 Fan Speeds
Heat/Cool
No
No. of Air Flow Directions
-
CFM
275 CFM
Vent/Air Exchange Exhaust
-
Moisture Removal (Pints/hr)
3.4 Pints/hr
Filter Description
-
Washable Filter
-
Standard Mesh Filter
No
Charcoal Filter
-
Inverter Technology
Yes
Chassis Type
Thru the Wall
Additional Features
Precise Comfort, Perfect Fit, Built to Last, Smart Control
Universal Fit Wall Sleeve
-
General Features
Inverter, Quiet, Smart
WiFi Connected
Yes
Wifi/App Controllable
Wifi/Smartphone App Controllable
Smart Features
-
Works with
-
Control Type
Digital
Temperature Display
Yes
Automatic Timer
-
Delay Timer
No
Automatic Shut Off/Sleep Mode
No
Quietest
Yes
Remote Control Included
Yes
Replacement Sleeve Included
-
Replacement Sleeve Model
WSEZ
Upgradeable Filter
No
Upgradeable Filter Model Number
-
Trim Kit Included
-
Energy Star Rated
Yes
Energy Efficiency Ratio
13 EER
Energy Star Approved
Yes
Power Cord Length (in.)
72 Inches
Power Requirements
110 Volt 15 or 20 Amp Circuit (Parallel Plug)
Voltage (V)
115
Amperage
15 Amps
Auto Restart
Yes
Refrigerant Type
R32
Power Cord Location
-
Cooling Amps
11.6 Amps
ADA Compliant
No
CSA Listed
No
ETL Listed
No
UL Listed
No
Warranty Terms - Parts
24 Month(s)
Warranty Terms - Labor
24 Month(s)
Rated 1 out of
5
by
mark from
Loud compressor, temp sensor sucks, slow service
I’ve had this AC for about a month, in Manhattan NYC in a pre-war apartment on the 5th floor. Compressor is unbelievably loud. Called PC Richard customer service and they scheduled a first HVAC contractor bailed on looking at and fixing it. Having to wait several more weeks for an alternative contractor to see it. You aren’t allowed to return AC units once you take it out of the box, so if I can’t get the compressor to be reasonable I’m stuck with it. That’s just kinda cruel. So hard to sleep with it, it’s just so loud. Also the fan noise is not quiet at all either, it’s a wall unit so fan noise is expected to be a bit louder than wall units, but whew it’s really loud even at the lowest speed. The temperature sensor is right next to the cold intake fins so you’ll have super wide temperature swings. Your room will be 10 degrees or more above what you set the AC to and then once it’s finally cold enough near the find it’ll start cooling and once it sucks in the hot room air it’ll detect a more accurate temperature so it runs literally forever. It doesn’t even cool your room to the temperature you set, the fins just end up getting ice cold so the temperature sensor falsely thinks the room is at the temp you set. First months energy bill in June with it was $115 above normal. It’ll be even worse in July, probably $150 or $175 above normal. That’s with the temp set at 74F. Yes, 74F, pretty reasonable. Friedrich claims it’s like $60 PER YEAR or something to run it, not sure how they could possibly achieve anything remotely like it. I’ve used up almost two years of energy in one month according to them lol. I was able to connect the AC to WiFi and use their app for temperature adjustment but it only actually syncs with the AC maybe 20% of the time. I’ll try to change the temp and it supposedly updates the AC but nothing changes, I’ll close and reopen the app and try again and nothing. For a $1200 list price AC this is really just absolutely unacceptable, but I’m stuck with it because of PC Richard’s 19th century return policy. If you can, I’d recommend purchasing ACs from other retailers.
Date published: 2025-07-21