Raising a thermostat from 68°F to 70°F usually lowers AC runtime and energy bills; this article estimates the typical cost difference and the main drivers that change the price impact. The keyword “Cost Difference Between 68 and 70 Degrees AC” informs the focus on how a 2°F change affects monthly and annual electricity charges for U.S. homes.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Monthly Savings | $3-$6 | $8-$14 | $20-$35 | Assumptions: 2,000 sq ft house, SEER 14–18, 70°F vs 68°F, moderate climate. |
| Annual Savings | $36-$72 | $96-$168 | $240-$420 | Assumptions: summer-dominated cooling months, average electricity $0.16/kWh. |
| Peak Demand Reduction | 0.1-0.5 kW | 0.6-1.2 kW | 1.5-3 kW | Depends on system size and cycling. |
Typical Annual Energy Savings When Raising Setpoint 2°F
Most U.S. households save roughly $96-$168 per year by setting AC to 70°F instead of 68°F under normal summer conditions.
Typical total price impact: $36-$420 annually depending on climate, house size, insulation, and system efficiency. Assumptions: 2,000 sq ft, 8 cooling months, $0.16/kWh, SEER 14–18, normal occupancy.
How Energy, Labor, Equipment, Permits, and Taxes Add Up
Energy is the primary recurring cost component; replacement and service costs are separate and often one-time or occasional.
| Component | Materials | Labor | Equipment | Permits |
|---|---|---|---|---|
| Recurring (energy) | $0.12-$0.22 per kWh | N/A | N/A | N/A |
| Seasonal tune-up | $20-$50 parts | $75-$125 per hour | N/A | $0-$75 |
| Replacement AC unit (if efficiency upgrade) | $1,800-$4,500 | $500-$1,800 | $3,000-$8,000 | $0-$300 |
| Thermostat upgrade | $70-$350 | $75-$125 per hour | N/A | $0 |
Which Variables Change the Dollar Impact Most
House size and AC efficiency (SEER) are the strongest variables that change the final savings from a 2°F setpoint change.
Examples of numeric thresholds: smaller homes (under 1,200 sq ft) typically see under $100/year savings; large homes (3,000+ sq ft) can see $200-$420/year. SEER variation: moving from SEER 10 to SEER 16 can change annual cooling use by 30%-40% and therefore change the dollar savings from setpoint changes proportionally.
How Climate and Region Affect the Price Difference
Hotter, humid climates increase both absolute savings and peak demand reduction when the setpoint is raised 2°F.
Regional deltas: Southern U.S. households often see 1.5-2× the savings of Northern households because of longer cooling seasons. Urban areas with higher electricity rates may see 20%-40% higher dollar savings than rural areas with lower rates.
Three Real-World Example Estimates With Specs and Totals
Concrete examples help translate percentage savings into dollars for common home scenarios.
| Scenario | Specs | Estimated Monthly Savings | Estimated Annual Savings |
|---|---|---|---|
| Small condo | 900 sq ft, SEER 13, $0.14/kWh | $3-$6 | $36-$72 |
| Typical suburban home | 2,000 sq ft, SEER 15, $0.16/kWh | $8-$14 | $96-$168 |
| Large home/older AC | 3,500 sq ft, SEER 10, $0.20/kWh | $20-$35 | $240-$420 |
Practical, Non-Promotional Ways To Reduce AC Costs Related To Setpoint
Controlling scope—such as limiting cooling to occupied zones, improving insulation, and sealing ducts—reduces the incremental cost impact and increases the benefit of a higher setpoint.
Specific options: program setbacks for unoccupied hours, use ceiling fans (allowing higher setpoints), perform annual tune-ups ($75-$125/hour), and upgrade to a programmable or smart thermostat ($70-$350) to capture automated savings without comfort trade-offs.
When an Upgrade or Repair Changes the Savings Math
Upgrading to a higher-SEER system or repairing failing components can change the estimated savings from a 2°F shift and may justify a different cost/benefit decision.
Cost examples: replacing an old 10-SEER unit with a 16-SEER unit can cost $4,500-$9,000 total but reduces energy use enough that the same 2°F change yields smaller proportional savings; consider payback in years before replacing solely to optimize setpoint savings.