Why Phoenix Homes Are Unique
Located in Climate Zone 2, Phoenix homes battle intense radiant heat. Attics can climb well above outdoor air temperature in summer, which drives heat into bedrooms and makes cooling systems work harder.
The average residential electricity rate in AZ is $0.14/kWh. In hot climates, inefficient attic insulation acts like a tax on every hour your air conditioner runs.
The Hidden Cost of Doing Nothing in AZ
By the numbers:
- Annual Heating Degree Days (HDD):1200
- Annual Cooling Degree Days (CDD):3000
- High CDD values indicate the dominant seasonal load.
Zone 2 data shows that cooling load is the primary driver of avoidable energy waste. Upgrading attic insulation toward R-38 is one of the most direct ways to cut that load.
Cost vs. Value: Is It Worth It?
For a typical 1,000 sq. ft. attic in Phoenix, a professional blown-in insulation upgrade often costs between $1800 and $2160, depending on labor rates and prep work.
With estimated yearly savings of $193, the project often pays for itself in 9.3 years.