Does your air conditioner provide the comfort and even climate you want in your home? Homeowners may be unaware if the air conditioner in their home is improperly sized. If you do have an oversized air conditioner then you may be paying too much in energy costs and getting too little in home comfort.
Several problems may result from an oversized air conditioner. Check your air conditioner to see if you notice any of the following problems typical of an oversized air conditioner.
- Noisy operation: A/C should be fairly quiet.
- Short operation times and blasts of cold air: A/C should operate for longer periods of time to cool more slowly, get better air mixing, and use less energy. Blasts of cold air cause the thermostat to turn the conditioner off after a short time.
- Indoor air feels moist or clammy: Short on and off cycling does not allow enough time to remove moisture from the air. Overly moist air can lead to growth of mold and mildew.
- Temperatures throughout the home are uneven: an oversized air conditioner and/or ineffective air distribution system may cause “drafts” or bursts of cold air from the conditioner, vents or registers.
For best results air conditioners need to be properly sized based upon the industry standard Manual J residential load calculation. Load calculations account for aspects of the home and its air distribution system and outside climate. Calculations are made using a spreadsheet available now as an iPhone application. Results of the load calculation should include the heating load for coldest days, latent cooling load for how much moisture to remove, and block and room-by-room loads for whole house and individual room needs. This information is used to select a properly sized unit for your home.
If you are ready to consider a new air conditioner, buyer information is available to help you start your search.
Our goal is to help educate our customers in Traverse City, Michigan and surrounding areas about energy and home comfort issues (specific to HVAC systems). For more information about oversized air conditioners and other HVAC topics, download our free Home Comfort Resource guide.
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