*SEER = Seasonal Energy Efficiency Ratio
North Carolina Alternative Energy Corp.
This nonprofit organization examined air conditioning manufacturers efficiencies versus the actual efficiencies that resulted after installation.
• 90% of the units tested exhibited some sort of energy-wasting problem.
• 50% had an improper refrigerant charge.
• 40% failed to meet minimum air flow criterion.
- 20% were barely inside the range specified by manufacturers.
• A deficiency of only 20% in indoor air flow reduces the SEER rating by 17%
• A 15% return air leak from a 120º attic can reduce a 12 SEER to a 6 SEER.
Texas A&M University
• A 23% refrigerant undercharge could could result in a 52% efficiency loss.
Pacific Gas & Electric
The average heating energy savings for...
• Repair of disconnected ducts was 15%
• Repair of diffuser leakage was 7.5%
• Correction of low air flow was 5.6%
• Repair of leaks and correction of refrigerant charge was 18.4%
Lakeland Electric & Water
• Cooling energy was reduced by and average of 17.4% for repairing leaky duct work.
Honeywell
• In 20 years a 12 SEER unit could degrade to a 6 SEER if it is not properly maintained....This would double energy costs.
Louisiana State University & Gulf State Utility
• Consumers can save about $30.00 per month just by making sure that their air conditioning system is cleaned and serviced regularly.
HVAC Manufacturers
• Data shows a condensing unit with a SEER of 13 matched with an old air handler would decrease the SEER to 9.2, resulting in a 30% efficiency loss.
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