Whirlpool WHAT102-HAW Review: 10,000 BTU Wall AC with Heat, 230V
Whirlpool's 230V wall unit pairs 10,000/9,800 BTU cooling with 10600/8600 BTU supplemental heat for up to 450 sq ft, and fits sleeves from 24.5 to 27 inches wide.
By Daniel Brooks
Updated October 22, 2026
The Whirlpool WHAT102-HAW is a 10,000 BTU through-the-wall air conditioner with supplemental heat, rated for spaces up to 450 square feet. It delivers 10,000/9,800 BTU of cooling and 10600/8600 BTU of heat at its higher and lower voltage settings, uses R-32 refrigerant, and has a universal fit chassis for sleeves 24.5 to 27 inches wide. It has 15 ratings on its listing in our through-the-wall air conditioners with heat category.
Our Verdict
The WHAT102-HAW is a dependable, no-fuss heat and cool wall unit from a familiar appliance brand. Its biggest strength is fit: few wall units accept such a wide range of sleeve sizes, so it is an easy replacement for an older unit when you are not sure which brand of sleeve is in the wall. The heater is strong for a 10,000 BTU model, and the controls cover the basics with 3 fan speeds, 4 modes, Eco and Sleep functions and a 24 hour timer.
There is no Wi-Fi, and Whirlpool is clear that the heat is supplemental. It is designed to take the chill out of early fall nights, not to serve as a primary heat source in the coldest months. The unit also needs a 230V/20A outlet.
Whirlpool 10,000 BTU Wall Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Whirlpool |
| Model | WHAT102-HAW |
| Type | Through-the-wall air conditioner with supplemental heat |
| Cooling Capacity | 10,000/9,800 BTU |
| Heating Capacity | 10600/8600 BTU |
| Room Size | Up to 450 sq ft |
| Power | 230V/20A outlet, 4.9 ft cord |
| Efficiency | 9.6 (listed) |
| Dehumidification | Up to 1.2 pints per hour |
| Refrigerant | R-32 |
| Noise Level | 57 dB (listed) |
| Controls | On-board electronic controls and remote |
| Dimensions | 24.2 x 14.5 x 20.3 inches (W x H x D) |
| Sleeve Fit | 24.5 to 27 inches wide |
| Weight | 65.9 pounds |
Cooling Capacity and Room Size
Whirlpool rates the WHAT102-HAW for spaces up to 450 square feet, and it removes up to 1.2 pints of moisture per hour. On the ENERGY STAR chart below, 10,000 BTU sits on the 400 to 450 square foot row, so the rating is realistic. That suits a large bedroom, a home office, a den or a small living room.
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Supplemental Heating
The heater is rated at 10600/8600 BTU depending on supply voltage, which is more than the cooling output at full voltage and strong for a 10,000 BTU wall unit. It warms a room quickly on cool spring mornings and early fall nights. Whirlpool states that it is not meant as a primary heat source in the coldest months, so plan to use it alongside your main heating system in a cold climate.
Electric heat costs more to run per hour than gas heat, so the 24 hour timer is useful for warming the room only when you need it.
Power Requirements
This unit requires a special 230-volt/20-amp outlet and comes with an attached 4.9 foot cord. Whirlpool notes that it will not operate with a standard household outlet. Check the receptacle beside your sleeve before you order, and make sure the cord reaches it without an extension.
Installation and Sleeve Fit
The universal fit design is the standout. The chassis measures 24.2 inches wide, 14.5 inches tall and 20.3 inches deep, and it fits sleeves from 24.5 to 27 inches wide. A trim kit and rear grille are included to finish the installation, and the sleeve itself is sold separately. At 65.9 pounds, it is manageable for two people. Because the fit range is so wide, it is a strong option when replacing an older unit from another brand.
Controls and Everyday Use
The on-board electronic controls are backed by a remote, so you can change settings from across the room. You get 3 fan speeds, 4 operation modes, 8-way directional louvers, Eco and Sleep functions, and a programmable 24 hour timer for start and stop times. Eco mode saves energy by turning off the compressor once the room reaches your set temperature. The quick-access filter slides out for cleaning, and a filter light reminds you when it is time.
Noise and Efficiency
Whirlpool lists 57 dB, a moderate level that suits living rooms and offices and works in most bedrooms, especially in Sleep mode. The listed efficiency figure of 9.6 is typical for a conventional heat and cool wall unit, and R-32 refrigerant is a current, lower impact choice.
Care and Maintenance
Pull out and wipe the filter regularly during summer, and clean it again before the first cool spell, since dust cuts airflow in heat mode too. Keep the rear grille clear of leaves and debris, and confirm the sleeve still drains to the outside each season.
Who It Suits Best
The WHAT102-HAW suits medium rooms up to 450 square feet with a 230V/20A outlet, especially when you are replacing an older wall unit and want a chassis that fits a wide range of sleeves. It is less suited to homes with only standard outlets, smart home users, or cold climates that need a primary heat source.
Pros and Cons
| Pros | Cons |
|---|---|
| Fits sleeves 24.5 to 27 inches wide | Needs a 230V/20A outlet |
| Strong 10600 BTU supplemental heat | No Wi-Fi or app control |
| Eco, Sleep and 24 hour timer | Heat is supplemental only |
| 8-way louvers and 3 fan speeds | Sleeve sold separately |
| R-32 refrigerant | Short 4.9 foot cord |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Replacing an older wall unit | Homes with only standard outlets |
| Medium rooms up to 450 sq ft | Smart home users |
| Rooms that run cool in early fall | Cold climates needing primary heat |
| Buyers who want simple controls | Large living areas |
For more choices, see our picks for the best 10,000 BTU through-the-wall air conditioners with heat and the best through-the-wall air conditioners with heat.
Final Verdict
The Whirlpool WHAT102-HAW is a sensible, easy-to-fit heat and cool wall unit for medium rooms. Its wide sleeve range and strong supplemental heater make it one of the best replacement choices in the 10,000 BTU class. You can check the current price and details for the Whirlpool 10,000 BTU Wall Air Conditioner with Heat.
Frequently Asked Questions
Does the Whirlpool WHAT102-HAW have heat?
Yes. It provides 10600/8600 BTU of supplemental heat, depending on supply voltage.
What sleeve sizes does it fit?
It fits sleeves from 24.5 to 27 inches wide.
What outlet does it need?
It needs a 230V/20A outlet and will not run on a standard household outlet.
Does it have Wi-Fi?
No. It uses on-board electronic controls and a remote.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.