Best Air Conditioner For Bonus Room

5 Best Air Conditioner for Bonus Room Above Garage + Simple Tips on How to Get the Best AC

The bonus room above the garage, for some reason, is always colder in winter or hotter in summer than the main house. In most homes, builders do not insulate this room. In some cases, the thermal treatment is inadequate and there are air leaks which mess up the temperatures in the room.

5 Best-Selling Air Conditioner for Bonus Room Above Garage

Apart from insulating the room, another effective solution to this issue is getting a good quality air conditioner. If the room is rarely used, you can install an air conditioner that is separate from that of the main house. That way, this AC is used only when needed. Here are some options available to you.

Reviews of 5 Top Rated Air Conditioner for Bonus Room Above Garage

1. The Serenelife Portable 4-In-1 Air Conditioner with Heater and Dehumidifier

SereneLife SLACHT108 SLPAC Portable ( Operation, Includes Window Mount Kit, 10,000 BTU + HEAT, White)
Product Highlights:
  • own the temperature around you with a portable ac + heater: serenelife’s portable ac + heater lets you control the temperature and environment around you wherever you go. with 10,000 btu (ashrae) / 6,000 btu (sacc) cooling power, 9,000 btu heating power, and cold air coverage of up to 350+ sq. ft., you can bring portability to your comfort zone.
  • 4-in-1 operations - an ac, a heater, a dehumidifier, and a fan: not just a powerful ac, but you get to choose from 4 modes: a built-in dehumidifier, fan mode with 3 speed settings, the ac and the heater mode. switching between these modes is super easy with the remote controller.
  • handy, portable, and sleek: the serenelife portable air conditioner + heater system features a lightweight, handy, sleek, and aesthetic body design that will uplift the look of your bedroom, living room, or garage at home or office. it features rolling wheels for easy portability. also, the operating noise levels of only 52-56 dba ensures an even luxurious experience.
  • auto-swing, timer, push button control and more: serenelife’s portable ac and heater unit for rooms comes with loads of features for ultimate convenience. a built-in 24 hours timer comes with an automatic swing mode w/ moving wind vent. you can control everything including the unit selector (°c/°f), sleep key, and other features for your indoor air conditioner + heater with the remote controller and the push button control panel.
  • comes with an exhaust kit and a removable air filter for easy setup and maintenance : your quiet portable air cooler for room is quick and easy to set up. just take your ac where it is required and install the window mount exhaust kit and the exhaust hose in a few minutes and you are done. also, the removable air filter makes it super easy to wash.

Serving up to 350 sq. ft, this portable AC is sleek and lightweight. It comes with a built-in dehumidifier, a heater, and a fan in varying modes. It allows you to choose any of the 4 modes you fancy when you need it or it can be set to change automatically.

The AC comes with a remote control that allows you to power it on and off, set fan speed, temperature and timer to suit personal preferences. The cooler comes with 10,000BTU power while the heater has 9,000BTU power. This AC’s operating noise level is about 52 to 56 dB.

2. Newair Portable 3-In-1 Air Conditioner

NewAir AF310 Portable Indoor ( Cooler, 100 Square Foot Effective Range)
Product Highlights:
  • swamp cooler - this powerful fan and evaporative cooler offers two ways to cool your personal space
  • features - with 3 fan speeds, 3 cooling modes and an automatic timer, this air humidifier has is all
  • eco-friendly - instead of freon and other chemicals, get climate control that uses clean evaporation
  • quality - this portable air conditioner is made with quality materials, to keep you comfy all day
  • newair - with good quality products and excellent customer service, newair is a name you can trust

Powered by 80 watts AC outlet, this air conditioner can serve a room that is up to 100 sq. ft. It features 3 modes, through which you can choose whether to activate the fan, cooler, or dehumidifier.

It’s a stylish, compact, and lightweight portable AC that can be used in the bonus room above the garage. It is an evaporative cooler with a modern design that takes very little space. It comes with a remote control that allows you to customize settings from anywhere in the room. It also comes with a timer.

3. VacPlus Air Conditioner with Dehumidifier and Wi-Fi Remote

Vacplus Dehumidifier 50 Pints ( Medium Spaces And Basements (Nickname: VA-D1901))
Product Highlights:
  • 100% risk-free satisfaction: vacplus always pays 120% attention to our customers - each vacplus dehumidifier will be meticulously tested by our in-house engineering team to proactively address and prevent design or mechanical issues. buy vacplus now!
  • full-featured wifi remote & 4 operation modes: vacplus dehumidifier provides the wifi remote via the tuyasmart app that expands the limits of this dehumidifier for bathroom: remote switch; humidity monitoring and adjustment; 4 operation modes to choose ( standard / raining / drying / sleep ) - no more repeatedly leaving your bed or couch to adjust it and combating condensation & damp with further energy savings due to smart app scheduling! and rare is its 35.9 db average sound while working.
  • constant humidity & well-lit led control panel: vacplus basement dehumidifiers for home, featured with intelligent constant humidity can monitor humidity levels and adjust itself to maintain the selected one - saves you from repeatedly turning the portable dehumidifier on / off. for easier use, the featured top mounted control panel with led display uses 3 colors to remind you the present humidity. best choice for baby, pregnant woman, and the old.
  • 24-hr timer & optional drainage: vacplus bathroom dehumidifier provides you with 24-hr timer: you can program it to turn on / off after a specified amount of time, which helps you save money on a tariff offering cheaper energy at certain times of a day. additionally, this basement dehumidifier can automatically shut off when the 3.1l-tank (with splash guard) is full. and you can also use the dehumidifier drain hose connection to free yourself from the hassle of emptying the bucket.
  • large dehumidifier with powerful & durable compressor: vacplus improves dehumidifying efficiency by 25% - removing up to 50 pints (under 90% rh @ 86°f condition) moisture per day, which helps to prevent the peeling of wallpaper & your furniture away from odors. the dehumidifying efficiency is affected by the air flow, the smaller space means more obvious effect. ps. the amount of dehumidification may change with temperatures & humidity environment.

If the bonus room above the garage is particularly humid, this AC option is worth looking into. Its humidifier comes with a WiFi remote that you can use to set and monitor desired levels. This VacPlus AC comes with a timer that you can customize so that the AC goes on and off at selected times only.

This AC’s dehumidifier is so powerful that it improves efficacy by up to 25%. This removes up to 50 pints of moisture from the room in a day. In addition to keeping the room comfortable for habitation, this efficacy saves the wall paints and wallpapers from peeling.

4. Honeywell 12,000 BTU Portable AC with Dual Filtration System

Honeywell Contempo Series Portable ( 400-550 Sq. Ft. Polished & Powerful (Black/White))
Product Highlights:
  • stylish, powerful & dependable - cools rooms 450-550 sq. ft. thermal overload protection for added safety & peace of mind. automatic vertical wind motion helps distribute powerful cool air evenly for fast & consistent cooling
  • dual filters designed to protect from dust & hair to extend product life & performance. filters clean easily under a faucet for easy maintenance. full set window kit included for quick & easy installation for vertical and horizontal windows (max. hose length is 4 feet)
  • designed for comfort with 3 fan speeds, sleep mode, digital controls, 24 hour energy saving timer & remote control with digital display included
  • stress-free auto evaporation – no bucket to empty (except in areas with high humidity). built-in dehumidifier removes up to 86 pints/24 hours with continuous drain option for long unattended operation
  • 12000 btu (ashrae-128 standard) / 6500 btu (doe+ 2017 standard)

It is sleek, powerful, and can serve spaces that are up to 550 sq. ft. It comes with thermal overload protection which ensures that it stays safe during use, and automatic vertical wind motions for even and fast cooling.

This portable AC’s dual filtration system is designed to protect it from dust, dirt, and hair, thereby giving it a longer lifespan. The filters are easy to clean and maintain.

It comes with various modes that allow you to set preferred temperature and noise levels. The humidifier is set to auto-evaporate unless the room has high humidity. This AC comes with all the necessary accessories for hassle-free installation.

5. Black & Decker 8,000 BTU Portable AC 

BLACKDECKER 8000 BTU Portable ( Remote Control, White)
Product Highlights:
  • quiet & powerful - our 4,000 btu (8,000 btu ashrae) compact air conditioner (16.5 x 11.5 x 26 in,) will keep you cool and comfortable all summer. an adjustable fan speed cools the air to 65°f at the coolest setting. sleep mode makes it extra quiet while you rest, casters for easy mobility
  • perfect for small rooms - this floor-standing portable ac unit provides steady, fast, effective cooling for rooms up to 150 sq. ft. it’s the ideal small air conditioner for dorms, apartments, cabins, campers, offices, bedrooms, or living rooms
  • simple & quick to install – just wheel this portable air conditioner into any room with a double hung or sliding window. attach the included hose (4’ 11”) & window adapter, & plug it in to an outlet! at the end of the season, just unhook & store. top mounted control panel with led display
  • easy to use & clean – the simple remote control & top-mounted led display with 24-hour timer allow you to precisely control the air temperature. to clean the filter, just slide it out twice a month, rinse it thoroughly under running water, & put it back
  • 3-in-1 functionality - combines 3 energy efficient functions for all of your cooling & ventilation needs with cool, fan, & dehumidifying modes all in one machine. bucket-less, self-evaporating operation makes your living space cool, clean and dry

As one of the great options when you need a powerful but compact AC, this unit is packed with dehumidifying, cooling, and air conditioning features. It is one of the simplest units to install, clean, and maintain. This portable unit comes with 4 castor wheels that make it easy to move around.

The AC comes with remote control and a timer. It has a sleep mode that auto-controls temperature while you sleep. While it is powerful, it is relatively quiet. It serves spaces of up to 150 sq. ft.

Buying Guide

1. Size of the room

Air conditioner manufacturers usually specify the size of the room that the unit can effectively serve. Generally, the power of an AC (measured in BTU) will show the size of the room that the unit can serve.

2. Noise

Air conditioners are known to be noisy, regardless of the type. Most manufacturers strive to make ACs as quiet as possible. If a manufacturer strives to make the AC quiet, they will be sure to announce it in the product description. The noise is measured in decibels (dB). The lower the dB value, the quieter the AC unit.

3. Installation Process

If you opt for a portable AC unit, installation is easy – for most units. The challenging part of the installation process is hooking up the ventilation window kit. However, all AC units come with clear, step – by – step instructions and accessories needed for the installation.

4. Condensation Type

ACs are designed to either deposit the collected condensed air into a bucket that you have to occasionally dump or use an exhaust hose. Some ACs are no-drip, meaning that they can auto-evaporate the condensed air or release it into the atmosphere so no need to dump anything.

5. Features

Look out for the features you want and need in an AC. These could be options such as a programmable thermostat, remote control, auto drainage, dehumidifier, heat and cooling combo among others. AC features are usually indicated in the product description.

Frequently Asked Questions

Do I have to connect the bonus room AC to the main house air conditioner system?

No. When dealing with the bonus room above the garage, you may not use it as often as the main house. Therefore, you can opt for a different AC system (in addition to insulation) or purchase a portable AC for the room.

What happens with the moisture that the AC pulls out of the room?

It depends on the AC you get. Some have an internal bucket that you will need to dumb periodically while others are equipped with automatic self-evaporate technology. Many units today, thanks to technology, do not need you to keep dumping or draining.

Is a portable AC energy efficient?

Most of the units in the market today are energy efficient. However, to verify that a unit is indeed energy efficient, look out for EER (Energy Efficiency Rating). A high EER means that the AC is more energy efficient.

What do I need to set up a portable AC in my bonus room?

It depends on the unit you have purchased. All the units come with instructions and the required accessories from the manufacturer. The manufacturer also gives instructions and recommendations for cleaning and maintenance.

Can I use a portable AC if my bonus room does not have a window?

All ACs need to be installed in a place where they can release heat. A window is the most convenient option. If it is not there, other options such as an exhaust tube or a small vent leading to the outside would do the trick.


If you are not sure of the features of the Air Conditioner that you think will be appropriate for the bonus room above the garage, do some research and talk to the seller.