How Much Are You Saving?
See the real monthly cost difference between running your Evaporative Cooler versus Central A/C.
Efficiency Check
See how much you save vs. A/C
75% Less Energy
Swamp coolers only power a fan and small pump—no energy-hungry compressor.
Pennies of Water
Yes, they use water—but it costs $5-15/month. Electricity savings dwarf this.
Fresh Air Flow
Unlike A/C that recirculates stale air, evap coolers constantly bring in fresh air.
Natural Humidity
In dry climates, added moisture is a benefit—no more dry skin or static.
Real Cost Comparison
| Cost Factor | Swamp Cooler | Central A/C |
|---|---|---|
| Electricity (per month) | $15-$35 | $150-$350 |
| Water (per month) | $5-$15 | $0 |
| Seasonal maintenance | $50-$100 | $100-$200 |
| Replacement pads/filters | $30-$80/year | $50-$150/year |
| Typical Summer Total | $100-$200 | $600-$1,200 |
*Based on 4-month cooling season (May-September) in Phoenix, AZ. Your costs vary by location, electricity rates, and usage patterns.
Why Savings Vary by Region
Your actual savings depend heavily on local electricity rates. Here's how evaporative cooler markets compare (residential rates as of 2025):
Higher electricity rates = bigger savings with evaporative cooling. California residents save the most!
Environmental Impact
Lower demand on the power grid means fewer emissions from power plants.
No HFCs or other greenhouse gases. Just water and air.
Longer lifespan than many A/C units means less manufacturing waste.
Frequently Asked Questions
How much water does a swamp cooler use?
A typical residential unit uses 3-15 gallons per hour depending on size, humidity, and temperature. Over a full day of operation, that's roughly 50-150 gallons. At average water rates, this costs $0.15-$0.50 per day—far less than the electricity savings compared to A/C.
Do evaporative coolers work in humid climates?
Evaporative cooling works best when humidity is below 50%. In dry climates (Arizona, Nevada, New Mexico), you can expect 15-25°F temperature drops. Between 50-60% humidity, cooling is limited. Above 60% humidity, evap coolers are ineffective and can make you feel more uncomfortable by adding moisture.
Can I run a swamp cooler and A/C together?
No—never run them simultaneously. A/C removes humidity while evap coolers add it. Running both wastes energy and can damage your A/C system. Some homes use evap cooling in spring/fall when it's dry, then switch to A/C during monsoon season when humidity spikes.
Why do I need to open windows?
Evaporative cooling requires airflow through the house. Fresh air enters through the cooler, absorbs heat, and must exit through windows or vents. Without exhaust, humidity builds up and cooling stops. Open windows on the opposite side of the house from the cooler for best airflow.
What about maintenance costs?
Annual maintenance is simpler and cheaper than A/C. You'll need to replace pads ($20-$80) once or twice per season, and perform spring startup/winter shutdown. Many homeowners DIY this. Professional tune-ups run $75-$150. Compare this to A/C service calls at $150-$300.
Are the savings worth it if I already have A/C?
If you live in a dry climate and your A/C bills exceed $200/month in summer, adding an evap cooler can pay for itself in 1-2 seasons. Many homeowners use evap cooling as their primary system April-June and September-October, only switching to A/C during the humid monsoon months (July-August in Arizona).
Want to Start Saving?
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