Keystone KSTHW18B Window-Wall Air Conditioner and Heater Review for Large Rooms

Description

Efficient Cooling and Heating for Large Spaces

I’ve been testing the Keystone 18,800 BTU Window-Wall Air Conditioner with 16,000 BTU Supplemental Heating (model KSTHW18B), and let me just say, this thing brings serious power to the table. Whether you’re trying to cool down a large living room or add some warmth on a chilly day, this unit tackles both tasks effectively. With a cooling capacity of 18,000 BTUs and a supplemental heating capacity of 16,000 BTUs, this device is designed for spaces up to 1,000 square feet. It’s ideal for apartments, living rooms, or any large area that needs year-round temperature control.

I installed it through the wall in my apartment, and its dual functionality has been a game-changer. The dehumidification feature, which can handle up to 3.8 pints per hour, is especially handy during humid days. What I found most useful is that it doesn’t just circulate air; it actually makes the environment more comfortable, tackling both heat and moisture in one go.

Smart and Convenient Remote Control

One standout feature is the I Sense remote, which is not your typical run-of-the-mill AC remote. This thing is smart. It measures the temperature of the room you’re in, displays it on the remote’s LCD screen, and communicates with the AC unit every three minutes for precise cooling. This means you don’t have to rely on the unit’s built-in thermometer; the remote ensures the temperature you’re experiencing is accurately reflected. I loved how I could sit on the couch and know exactly what adjustments to make without guessing.

The Energy Saver mode and Sleep mode also deserve a mention. I noticed a significant dip in my electricity usage by using these settings, which is a big plus if you’re trying to keep utility bills in check. The Sleep mode, in particular, adjusts the temperature gradually, ensuring I don’t wake up freezing in the middle of the night.

Space-Saving and Versatile Design

The form factor of this unit makes it incredibly versatile. Whether you’re using it as a window unit or installing it through the wall, it doesn’t take up unnecessary floor space. I opted for the wall installation, and while the wall sleeve isn’t included, it was easy to find a compatible one. Just keep in mind that you’ll need a 230V/25-amp electrical outlet, as this is not compatible with standard 115V outlets. This might be a downside for some, but if you’re prepared for it, the payoff in performance is worth it.

At 55 dB, the noise level is manageable. It’s not whisper-quiet, but it’s not disruptive either. I could comfortably watch TV or hold a conversation without needing to shout over the hum of the unit.

Key Benefits

• Powerful dual functionality: Cools and heats spaces up to 1,000 square feet.
• Smart remote: The I Sense remote ensures precise temperature control.
• Energy-saving modes: Reduces electricity usage with Sleep and Energy Saver modes.
• Dehumidification: Removes up to 3.8 pints of moisture per hour.
• Space-efficient design: Works as a window or wall unit, saving valuable floor space.

Areas of Concern

While this air conditioner is impressive, there are a few hurdles to consider:

• Electrical requirements: Requires a 230V/25-amp outlet, which may not be standard in all homes.
• Supplemental heating only: The heating feature is not meant to replace a primary heating system and works best in outdoor temperatures between 23–76 degrees.
• Wall sleeve not included: For wall installations, you’ll need to purchase a compatible sleeve separately.

Product Competitors

When comparing this unit to others in the market, such as the Frigidaire 18,000 BTU Window AC or the LG Dual Inverter Window Air Conditioner, there are a few trade-offs. For example, the LG unit is known for its inverter technology, which makes it slightly quieter and more energy-efficient. However, it lacks the supplemental heating feature, which is a significant advantage if you’re looking for year-round functionality.

The Frigidaire model, on the other hand, offers similar cooling power but doesn’t come with a smart remote like the Keystone’s I Sense. In terms of versatility, the Keystone edges out competitors with its dual installation options and all-in-one functionality. If you’re someone like me who values both cooling and heating in one package, this unit stands out.

Quality for Price

I believe this air conditioner offers affordable quality for what you’re getting. While it’s not the cheapest option on the market, its combination of cooling, heating, dehumidification, and smart features makes it a solid investment. The 1-year warranty with an additional 4 years for the sealed system gives some peace of mind, too. For large spaces, you’re unlikely to find this level of performance and versatility without spending significantly more.

As someone who’s tested this unit personally, I can say it’s worth considering if you need a reliable, multi-functional solution for your home. Just be sure you have the right electrical setup and don’t mind the additional cost for a wall sleeve if you’re going that route.

Additional information