When summer strikes, a portable air conditioner can be a great, affordable way to cool down your home or apartment without central air. These versatile units are flexible and convenient, allowing you to cool specific rooms as needed. In the video above, This Old House expert Richard Trethewey explores various air conditioning options, including portable models, and discusses their features and benefits.
How Portable Air Conditioners Work
Portable air conditioners are freestanding units that can be moved from room to room, offering targeted cooling where you need it most. Unlike window units, these appliances sit on the floor and vent hot air through a flexible duct that connects to a window.
Portable air conditioners operate on the same basic principle as other air conditioning systems. They use a refrigeration cycle to remove heat and humidity from indoor air, creating a cooler, more comfortable environment. Here’s a simplified breakdown of the process:
- Warm air is drawn into the unit
- The air passes over a cold evaporator coil, which absorbs heat and moisture
- The cooled air is circulated back into the room
- Hot air and collected moisture are vented outside through the exhaust hose
Advantages of Portable Air Conditioners
Portable air conditioners offer several benefits over traditional window units:
- Easy installation with no heavy lifting required
- Can be moved between rooms as needed
- Don’t block window views or prevent windows from opening
- Ideal for rooms where window units aren’t practical or allowed
Considerations for Portable ACs
While portable air conditioners are convenient, they do have some drawbacks:
- Generally less efficient than window units
- Might be noisier since all components are inside the room
- Require regular emptying of the condensate collection tank
- Take up floor space in the room
Factors to Consider When Choosing a Portable Air Conditioner
To select the best portable air conditioner for your needs, think through the following factors.
Room Size and BTU Rating
The cooling capacity of air conditioners is measured in British Thermal Units (BTUs). To effectively cool a space, you need to match the BTU rating to your room size. Here’s a general guide:
- 150–250 square feet: 5,000–6,000 BTUs
- 250–350 square feet: 7,000–8,000 BTUs
- 350–450 square feet: 9,000–10,000 BTUs
- 450–550 square feet: 11,000–12,000 BTUs
For the best performance, choose a unit with a BTU rating appropriate for your room size.
Energy Efficiency
Look for models with high Energy Efficiency Ratio (EER) ratings. The higher the EER, the more efficient the unit. Energy-efficient models may cost more upfront but can lead to significant savings on your electricity bills over time.
Noise Level
Portable air conditioners can be noisier than window units since all components are inside the room. If you’re sensitive to noise, look for models with lower decibel ratings, especially if you plan to use the unit in a bedroom or home office.
Drainage Options
Portable ACs collect moisture from the air as they cool. Some models have self-evaporating technology that expels most of the moisture through the exhaust hose. Others require manual draining of a collection tank. Think through which option best suits your lifestyle and maintenance preferences.
Types of Portable Cooling Solutions
While traditional portable air conditioners are popular, there are other options available for cooling your space:
Evaporative Coolers
Also known as swamp coolers, these units use water evaporation to cool the air. They’re most effective in dry climates and add humidity to the air. As Trethewey explains in the video, evaporative coolers are not as powerful as traditional air conditioners but can be suitable for certain regions, particularly in the American Southwest.
Smart Portable Air Conditioners
Some newer models come equipped with smart features, allowing you to control the unit remotely via a smartphone app. These advanced units can offer the following benefits:
- Scheduling and temperature control from anywhere
- Integration with home automation systems
- Energy usage tracking
- Automatic operation based on your location
Air Conditioner Installation and Maintenance Tips
Proper installation and maintenance will ensure your portable air conditioner operates at its peak:
Installation
Here are the typical steps for a portable AC installation:
- Choose a location near a window and power outlet
- Install the window kit and attach the exhaust hose
- Make sure the unit is level and has proper clearance on all sides
- Plug the unit into a dedicated circuit to avoid overloading
Maintenance
Regular maintenance will help your portable AC run efficiently. Follow these tips:
- Clean or replace the air filter monthly
- Clean the exterior and vents regularly
- Empty the condensate tank as needed
- Keep the exhaust hose free of kinks and obstructions
- Store the unit properly during the off-season
Alternative Portable Cooling Options
To accommodate different needs and preferences, several portable cooling options beyond traditional units exist.
Built-In Dehumidifiers
Some portable air conditioners come equipped with built-in dehumidifiers. By reducing moisture levels, these units not only cool the room but also create a more comfortable environment, particularly in humid climates.
Heat Pump Mode
Some portable air conditioners offer a heat pump mode, allowing them to provide both cooling and heating. This feature is especially useful in regions with fluctuating weather conditions.
Usage Scenarios for Portable Air Conditioners
Here are some scenarios where a portable air conditioner may be the best way to cool your home.
- Apartments and rentals: Portable air conditioners are particularly beneficial for renters who can’t make permanent modifications to their living spaces. Unlike window units, which can be bulky and may require landlord approval, portable units are noninvasive and can be easily moved.
- Home additions and renovations: Portable air conditioners can provide temporary cooling solutions without the need for new ductwork or extensive installation processes.
- Office spaces: In professional settings, maintaining a comfortable temperature helps productivity. Portable air conditioners can be conveniently deployed in offices, especially in buildings where central air conditioning is not enough or non-existent.
Modern Air Conditioner Features
Today’s portable air conditioners come with a range of technological advancements that improve their usability and efficiency.
- Eco-friendly refrigerants: With increasing environmental awareness, many manufacturers are using eco-friendly refrigerants in their portable air conditioners. These refrigerants have a lower impact on the environment compared to traditional options, aligning with global efforts to reduce greenhouse gas emissions.
- Remote-control operation: Many modern portable air conditioners include remote control functionality, allowing users to adjust settings from across the room. This feature is particularly useful in larger rooms or bedrooms, where manually operating the unit could be inconvenient.
- Timer functions: Timer functions let you set the unit to turn on or off at specific times. This is especially useful for saving energy, as you can program the air conditioner to run only when needed—for instance, cooling your home before you arrive from work.