1. Heat Pump Efficiency By: Chislon Chow
Objective: To explore the validity of the claims of heat pumps

2. Heat Pump Efficiency Overview
Ground source, air source heat pumps: “2 to 3 times more efficient”
Transfer of heat
instead of creating
Tennessee Valley

3. Ratings of Efficiency EF (energy factor)
Furnaces < 1, HP >= 2
COP (coefficient of performance)
Non-standard
SEER (Seasonal Energy Efficiency Ratio)
HSPF (Heating Seasonal Performance Factor)

4. Factors Affecting Efficiency
Supplemental heat
Cycling losses
Defrost
(air source)
Buildings that need
lots of hot water
Steady need for AC
Mild or cool climates

5. Findings Ratings not easily comparable with furnaces
HP sometimes needs to create heat too
Ground source
Generally times more efficient
Air source HP efficiency depends on climate
Can be up to 1.5 to 3 times more efficient

6. Sources http://energyoutlet.com/res/heatpump/