Investing in a PV system in Arizona

Part 2 of Arizona Consumer’s Guide to Buying a Solar Electric System. Why should I buy a PV system? People decide to buy PV systems for a variety of reasons. Some want to reduce air pollution and help preserve the earth’s finite fossil-fuel resources. Others would rather spend their money on an energy-producing improvement to […]

Using Geothermal Energy Directly

Part 4 of Geothermal Energy: Power from the Depths of the Earth. If you’ve ever soaked in water from a natural hot spring, you’re one of the millions of people around the world who has enjoyed the direct use of geothermal energy. And while this naturally occurring hot water may be the perfect tonic for […]

Injuries & ADHD (Attention-Deficit/Hyperactivity Disorder)

Children and adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD) can have more frequent and severe injuries than peers without ADHD. Injuries and Hospital Use in Children and Adolescents Research indicates that children with ADHD are significantly more likely to be injured as pedestrians or while riding a bicycle, to receive head injuries, injure more than one part […]

When Are Photovoltaic Systems Appropriate?

People select PV systems for a variety of reasons. Some common reasons for selecting a PV system include: Cost—When the cost is high for extending the utility power line or using another electricity-generating system in a remote location, a PV system is often the most cost-effective source of electricity. Reliability—PV modules have no moving parts […]

Choosing a Contractor

Part 4 of Energy-Efficient Air Conditioning. Choosing a contractor may be the most important and difficult task in buying a new central air conditioning system. Ask prospective contractors for recent references. If you are replacing your central air conditioner, tell your contractor what you liked and did not like about the old system. If the […]

Air Conditioner Efficiency

Part 2 of Energy-Efficient Air Conditioning. Each air conditioner has an energy-efficiency rating that lists how many Btu per hour are removed for each watt of power it draws. For room air conditioners, this efficiency rating is the Energy Efficiency Ratio, or EER. For central air conditioners, it is the Seasonal Energy Efficiency Ratio, or […]

Energy-Efficient Air Conditioning

Are you considering buying a new air conditioner? Or, are you dissatisfied with the operation of your current air condi- tioner? Are you unsure whether to fix or replace it? Are you concerned about high summer utility bills? If you answered yes to any of these questions, this publication can help. With it, you can […]

Improving Performance

Part 5 of Air-Source Heat Pumps. Poor installation, duct losses, and inadequate maintenance are more of a problem for heat pumps than for combustion furnaces. A growing body of evidence suggests that most heat pumps have significant installation or service problems that reduce performance and efficiency. According to a report on research funded by Energy […]

Investing in Solar Thermal Technologies

Part 3 of Heat Your Water With The Sun. Why should I invest in a solar thermal system? The first question many people ask when considering a home expense is, “How much will it cost?” The answer depends on the type of system, how you want to use it (water or pool heating, for example), […]