Can You Leave a Window Air Conditioner in All Winter? The Definitive Guide
Leaving a window air conditioner in during the winter is generally not recommended. While it might seem convenient, it can lead to drafts, energy loss, and potential damage to the unit and your window frame.
The Winter Woes of Window AC Units
Many homeowners grapple with the decision of whether or not to remove their window air conditioners before winter arrives. The convenience of leaving them in place is tempting, but the potential drawbacks often outweigh the benefits. Understanding these drawbacks is crucial for maintaining a comfortable and energy-efficient home throughout the colder months.
Drafts and Heat Loss
A primary concern is the drafts that can seep through even well-installed window AC units. The seals around the unit, while effective in summer, often become brittle and less effective in freezing temperatures. This allows cold air to infiltrate your home, forcing your heating system to work harder and increasing your energy bills. Leaving gaps around the unit, even small ones, creates a significant pathway for heat to escape and cold air to enter.
Potential for Damage
Winter weather can be harsh on window AC units. Freezing temperatures can cause the internal components to contract and potentially crack. Moisture, such as snow or rain, can seep into the unit and freeze, further exacerbating the damage. Corrosion can also occur, particularly if the unit is exposed to road salt or other de-icing chemicals. Over time, this can significantly shorten the lifespan of your air conditioner.
Security Concerns
Leaving a window AC unit in place can also present a security risk. While a properly installed unit is generally secure, an older or poorly fitted unit can provide a potential entry point for intruders, especially if the window itself is not robust.
The Aesthetic Impact
While less critical than the other concerns, the aesthetic impact of leaving a window AC unit in place throughout the winter should be considered. An AC unit jutting out from a window isn’t typically visually appealing and can detract from the overall appearance of your home.
Alternative Solutions: What You Should Do Instead
Instead of leaving your window AC unit in place, consider these alternative solutions to ensure comfort, energy efficiency, and the longevity of your appliance.
Removing and Storing the Unit
The best option is to remove the window air conditioner entirely. This allows you to properly seal the window opening, preventing drafts and heat loss. Store the unit in a dry, protected place like a basement, garage, or closet. Before storing, clean the unit thoroughly, including the filter, to prevent mold and mildew growth.
Covering the Unit
If removing the unit isn’t feasible, a good alternative is to cover it with a specially designed AC cover. These covers are typically made of insulated materials and are designed to block drafts and protect the unit from the elements. Ensure the cover is securely fastened to prevent it from being blown away by strong winds.
Insulating Around the Unit
If you must leave the unit in place without a cover, thoroughly insulate around the edges using weather stripping, foam sealant, or even towels. While this is a less effective solution than removing or covering the unit, it can help to reduce drafts and heat loss. Regularly check the insulation to ensure it remains in place and is effective.
FAQs: Winterizing Your Window AC Unit
Here are some frequently asked questions regarding leaving your window AC unit in place during the winter:
1. What are the specific risks of freezing temperatures on a window AC unit?
Freezing temperatures can cause the internal components of the AC unit to contract and potentially crack. The condenser and evaporator coils are particularly vulnerable. Water that seeps into the unit can freeze and expand, causing further damage.
2. Will covering the unit with plastic wrap be sufficient?
While plastic wrap might offer some protection, it’s not a recommended solution. Plastic wrap is not designed to withstand extreme temperatures or block drafts effectively. A purpose-built AC cover is a far better option.
3. How can I properly clean my window AC unit before storing it for the winter?
First, unplug the unit and remove it from the window. Use a vacuum cleaner with a brush attachment to remove dust and debris from the fins and coils. Wash the filter with warm, soapy water and allow it to dry completely before reinserting it. Wipe down the exterior with a damp cloth.
4. Can I use duct tape to seal gaps around the unit?
While duct tape might seem like a quick fix, it’s not a long-term solution. Duct tape deteriorates over time, especially in extreme temperatures. It can also leave a sticky residue that is difficult to remove. Use weather stripping or foam sealant instead.
5. Will leaving the unit in place affect my home insurance?
This depends on your specific insurance policy. Some policies may not cover damage to the unit or your home if it’s deemed to be caused by improper winterization. Consult your insurance provider to clarify the terms of your policy.
6. Are there any window AC units specifically designed to be left in place year-round?
While some newer models might be more robust and weather-resistant, no window AC unit is truly designed to be left in place year-round without any precautions. Following the recommendations above is always advisable.
7. How often should I check the insulation around the unit if I choose to leave it in place?
Check the insulation at least once a month throughout the winter to ensure it remains intact and effective. Replace or repair any damaged insulation immediately.
8. What type of AC cover is best?
Look for an AC cover made of durable, waterproof, and insulated material. Choose a cover that fits your specific AC unit size and is easy to install and remove.
9. If I notice condensation forming on the inside of the window, what should I do?
Condensation indicates poor insulation and air leakage. Improve the sealing around the unit and consider using a dehumidifier to reduce moisture levels in the room.
10. Can a window AC unit contribute to mold growth during the winter?
Yes, if moisture is trapped inside or around the unit, it can create a breeding ground for mold. Proper cleaning and drying before storage or regular inspection and cleaning of the installed unit are crucial to prevent mold growth.
11. Does leaving a window AC unit in place affect the window’s structural integrity?
The weight of the unit, combined with temperature fluctuations, can potentially strain the window frame. Regularly inspect the window frame for any signs of damage, such as cracks or warping.
12. Is it better to remove the entire window to remove the AC unit easier?
No, do not remove the entire window. This is unnecessary and could compromise the window’s structural integrity and weather sealing. Follow the manufacturer’s instructions for removing the AC unit. If you’re unsure, consult a professional.
By understanding the potential risks and taking appropriate precautions, you can protect your window air conditioner and your home from the damaging effects of winter. Remember, a little effort now can save you significant trouble and expense in the long run.