How Do You Fix the Air Conditioner on a 1977 Camaro

SEER VS EER - What's the Real Difference between Them

SEER and EER are energy efficiency ratings for air conditioners and very similar in what they measure.

SEER and EER testing are done in a controlled environment to ensure that each air conditioner model's efficiency is measured "apples to apples."

The differences between SEER and EER are:

• None SEER is used for central air conditioners and heat pumps.

• None EER is used for window air conditioners

• None SEER determines expected energy efficiency for the whole season, so the efficiency of the AC is measured at air temperatures from 65F to 104F.

• None Because SEER is measured at various temperatures, it accounts for the AC starting and stopping.

• None Because EER is measured at a high temperature, it accounts for the AC running all the time (steady state).

The testing is done by the Air Conditioning, Heating and Refrigeration Institute, or AHRI. Here is its explanation of SEER ratings.

Both are like gas mileage! Miles per gallon is replaced by the amount of cooling per watt hours of energy (fuel) used by the air conditioner.

In SEER and EER, the higher the number, the more efficiently the unit uses electricity. SEER numbers are higher than EER numbers for any given model of air conditioner.

For example, the Amana AVXC 20 central air conditioner has a SEER rating of 23 and an EER rating of 14. It happens to be one of the most efficient air conditioners currently available.

By the way, it is becoming more common to see both SEER and EER ratings with central air conditioners. Central air conditioner manufacturers are required to measure the EER of their units, but they do not always list the EER prominently in their marketing material.

And you will sometimes see SEER ratings on window ACs. Mini split air conditioners often use both ratings.

If you like to explore technical issues in detail, the rest of this post will be of interest.

This guide explains SEER and EER ratings, how they compare and why they are important.

SEER Defined: According to the US Department of Energy and the Energy Star program, Seasonal Energy Efficiency Rating, "is a measure of the total cooling of a central air conditioner or heat pump (in BTU) during the normal cooling season as compared to the total electric energy input (in watt-hours) consumed during the same period."

The equation divides the amount of cooling achieved by the amount of energy needed to achieve it at various temperatures between 65F and 104F. Specifically, cooling is the number of BTUs of heat moved from indoors to outdoors to reach the thermostat set point. That number is divided by the energy used, specifically the number of watt hours of electricity it took to move that heat over an entire cooling season.

Since SEER is designed to accurately estimate energy efficiency over an entire season, central air conditioners are tested at a range of temperatures from 65F to 104F. The measurements simulate the changing temperatures from spring through summer into fall.

EER Defined: The DOE says, "Energy Efficiency Ratio is a measure of how efficiently a cooling system will operate when the outdoor temperature is at a specific level." As noted, that level is 95F. The start point for indoor conditions are 80F with 50% humidity.

EER ratings and SEER ratings are the Energy Department's attempt to have standardized rating systems for all types of air conditioners.

SEER and EER ratings generally follow one another. If the SEER rating for air conditioner A is higher than for air conditioner B, then A's EER rating will be higher too.

Occasionally the units will measure differently. When that happens:

• EER ratings are more important in very warm climates, since the rating measures an AC that is always running - one in technical terms that is under "full load."

• SEER ratings are more important in climates with a range of summertime temperatures, since it considers the starting and stopping of the unit.

Just be sure to compare SEER to SEER and EER to EER. If you have the SEER rating of one AC and the EER rating of another, it is impossible to tell which air conditioner is more energy-efficient or which one will use less energy in your climate.

There's More Information in Our Guides

Central air conditioners, mini split air conditioners and window ACs are mentioned in this guide.

To fully explain each air conditioning option, we have prepared comprehensive buying guides to each type.

Each contains a wealth of information about air conditioner prices, efficiency, indoor climate control, pros & cons, top brands and more. Browse them to learn more about your options and to determine which AC type is best for your cooling needs.

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Is It Possible to Use a Portable Air Conditioner Through a Garage Door?
It will operate, but I would not hold up hope for much cooling. A garage wo not be insulated, the door wo not be sealed, so you will be trying to cool 'the great outdoors'.1. Do you know of a window/portable air conditioner that is safe in a child's room?Portable air conditioners stay inside your room leaving just a hole for ventilation through your window. Your window stays closed and there should be no danger of anything falling out either. Hope that helps.2. Is it safe to use and rest my laptop on a portable air conditioner?No but an AC has a huge magnetic field, BAD for hard drive!3. will rain hurt my soleus air portable air conditioner?All things are possible, grasshopper. Your biggest hurdle will be getting the heat from the condenser outside of the room you are trying to cool. You can build ductwork out of plywood or cardboard to an open window. Pull the fridge away from the wall put it in front of a window, and put a fan behind the fridge to move the heat. Build your ductwork to send the heat outside. Remove the doors from the fridge. Point the fan into the freezer area and turn the fan on full blast. Adjust the temperature dial in your reefer/freezer/room A/C to the mid-point. Unscrew the light bulb (do not want that heat load). A refrigerator runs constantly as it is. The more air you can get across the indoor and outdoor coils will help remove the heat from your room. Be aware that a refrigerator is only designed to remove the heat from a 14 sq ft box, so the smaller your room is, the cooler you can get it. It wo not be able to cool off a 1500 sq ft house, but it could cool a 100 sq ft room. It will start to condense the water from the air in the room (mostly from you sweating and breathing), and start to run out the bottom of the fridge. you might need to run a condensate line out the door. Also the ice in the freezer compartment will thaw out; this is a good thing, as it is absorbing the heat in the room. If more ice forms, move your fan closer to the freezer area. Let us know how it works out4. Does the fan need to run all time on a portable air conditioner?No. Most newer units have a power saver fan switch that cycles the entire unit off when the demand thermostat setting has been reached. It may be advantageous, however to leave a continuous fan enabled to maintain air mixing and circulation in the conditioned area. Additionally, by maintaining air circulation, temperatures are held to a more consistent temperature throughout. Lastly, the effect of air movement will help to cool between compressor cycles.Does the fan need to run all time on a portable air conditioner?5. Which type of portable air conditioner is best for an attic bedroom? A portable floor unit? Or a window unit?A floor unit must have the heated side vented out some how or you will be just heating and cooling the same air in circles6. What is the best type of portable air conditioner to put in an apartment that has sliding windows (sideways, n?no kit that i ever heard of yet you are able to take the two abode windows out and positioned it in yet you wil ought to build some form of bracing to hold it. this is carried out, I even have,in case you recognize a thank you to construct issues7. How much does it cost to run a 10,000 BTU portable air conditioner?That will depend on several factors:The EER or SEER energy efficiency ratingTemperature and humidity in the spaceYour cost per kWh for electricity.Let's do an example for California:Most portable A/C units are about 10.0 EER (energy efficiency ratio). Let's assume your space is 70 degrees, with 50% RH. California is a very high cost, high tax, high regulation state, so electricity is about $0.40 kWh for many residents.A 10,000 BTU A/C unit will use 1,000 watts, or 1.0 kWh each hour. This is calculated by taking 10,000 (BTU) and dividing by 10. 0 EER (BTU /watt). This gives you 1,000 watts, so over 1 hour you will use 1 kWh (kilowatt/hour) which is the unit of energy billed by the power company. Look at your power bill for your average cost of electricity (ranges from $0.04 to $0.45 across the US), and that would be your hourly rate. In this example, a homeowner who pays an average of $0.40 per kWh, it would cost $0.40 per hour to run that 10,000 BTU air conditioner.How much does it cost to run a 10,000 BTU portable air conditioner?.
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