Whirlpool WHAT082-HAW Review: 8,000 BTU 115V Wall AC with Heat
Whirlpool's smallest heat model pairs 8,000 BTU cooling with 4200 BTU supplemental heat for up to 350 sq ft, runs on a standard 115V outlet and fits 24.5 to 27 inch sleeves.
By Daniel Brooks
Updated October 22, 2026
The Whirlpool WHAT082-HAW is an 8,000 BTU through-the-wall air conditioner with 4200 BTU of supplemental heat, rated for spaces up to 350 square feet. Unlike Whirlpool’s larger heat models, it plugs into a standard 115V outlet, and its universal fit chassis takes sleeves from 24.5 to 27 inches wide. It has a 3.2 out of 5 average from 13 ratings in our through-the-wall air conditioners with heat category.
Our Verdict
For a bedroom, home office, guest room or small apartment room with a regular outlet at the sleeve, the WHAT082-HAW is a simple, easy-to-fit way to add light heat to a wall unit. The universal sleeve range makes it a strong replacement for an older unit from another brand, and the controls cover the essentials: 3 fan speeds, 4 operation modes, 8-way louvers, Eco and Sleep functions and a 24 hour timer.
Two points temper the recommendation. The rating average of 3.2 is below the better small heat units, and the 4200 BTU heater is light duty. Whirlpool says the heat is meant to take the chill out of early fall nights, not to be a primary heat source in the coldest months. There is no Wi-Fi.
Whirlpool 8,000 BTU Wall Air Conditioner with Heat
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Whirlpool |
| Model | WHAT082-HAW |
| Type | Through-the-wall air conditioner with supplemental heat |
| Cooling Capacity | 8,000 BTU |
| Heating Capacity | 4200 BTU |
| Room Size | Up to 350 sq ft |
| Power | 115V outlet, 4.9 ft cord |
| Efficiency | 9.6 (listed) |
| Dehumidification | Up to 0.8 pints per hour |
| 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 | 62.8 pounds |
Cooling Capacity and Room Size
Whirlpool rates the WHAT082-HAW for spaces up to 350 square feet, with up to 0.8 pints per hour of dehumidification. On the ENERGY STAR chart below, 8,000 BTU sits on the 300 to 350 square foot row, so the rating is realistic. It suits a typical bedroom, a nursery, a home office or a small apartment 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.
If the room is close to 350 square feet and gets strong afternoon sun, the 10,000 BTU Whirlpool will keep up better, though it needs a higher voltage outlet.
Supplemental Heating
The heater is rated at 4200 BTU, the usual output for a heat and cool wall unit on a standard outlet. It is ideal for warming a bedroom before bed, taking the chill off a cool morning, or adding comfort in a room that the central heat does not reach well. Whirlpool states that it is not meant as a primary heat source in the coldest months, and with this output, that is good advice.
Power Requirements
The WHAT082-HAW has an attached 4.9 foot cord that fits a standard 115V outlet. That is the main reason to choose it: you can install it in a sleeve that has only a regular outlet beside it, with no need for an electrician to add a higher voltage receptacle. A dedicated circuit is still recommended, and the cord should reach the outlet without an extension.
Installation and Sleeve Fit
The chassis measures 24.2 inches wide, 14.5 inches tall and 20.3 inches deep and fits sleeves from 24.5 to 27 inches wide. A trim kit and rear grille are included to finish the installation, and the sleeve is sold separately. At 62.8 pounds, it is one of the lighter heat models, though a second person still makes the job easier. The wide sleeve range is especially useful when you are not sure which brand of sleeve is in the wall.
Controls and Everyday Use
You can use the on-board electronic controls or the included remote. The unit offers 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 turns off the compressor once the room reaches the set temperature. The quick-access filter pulls out for cleaning, and a filter light reminds you when it is due.
Noise and Efficiency
Whirlpool lists 57 dB, a moderate sound level that works in most bedrooms on Sleep mode. The listed efficiency figure of 9.6 is typical for a small conventional wall unit.
Care and Maintenance
Wipe the filter clean every couple of weeks during summer and again before the first cool spell, since dust reduces airflow in heat mode too. Keep the rear grille clear of leaves and debris, and check that the sleeve still tilts slightly outward so condensate drains.
Who It Suits Best
The WHAT082-HAW suits small rooms with a standard 115V outlet at the sleeve, 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 large rooms, rooms that need strong heat, or smart home users.
Pros and Cons
| Pros | Cons |
|---|---|
| Runs on a standard 115V outlet | Light 4200 BTU heater |
| Fits sleeves 24.5 to 27 inches wide | 3.2 out of 5 average rating |
| Eco, Sleep and 24 hour timer | No Wi-Fi or app control |
| 8-way louvers and 3 fan speeds | Small rooms only |
| Trim kit and rear grille included | Sleeve sold separately |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Rooms with only a 115V outlet | Large living rooms |
| Replacing an older wall unit | Rooms needing strong heat |
| Bedrooms and home offices | Smart home users |
| Buyers who want simple controls | Buyers wanting a top rated unit |
For more choices, see our picks for the best 115V through-the-wall air conditioners with heat and the best through-the-wall air conditioners with heat.
Final Verdict
The Whirlpool WHAT082-HAW is a practical small wall unit that adds light heat on a standard outlet and fits a wide range of sleeves. Its rating trails the best small heat units, but for an easy replacement in a bedroom or office, it is worth a look. You can check the current price and details for the Whirlpool 8,000 BTU Wall Air Conditioner with Heat.
Frequently Asked Questions
Does the Whirlpool WHAT082-HAW run on a standard outlet?
Yes. Its 4.9 foot cord fits a standard 115V outlet.
How much heat does it provide?
Whirlpool rates the supplemental heater at 4200 BTU.
What sleeve sizes does it fit?
It fits sleeves from 24.5 to 27 inches wide.
What size room does it cool?
Whirlpool rates it for spaces up to 350 square feet.
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.