Encouraging homeowners, architects and building owners to specify efficient systems.


In a Colorado home, for much of the year, there is enough solar energy beaming down on the roof to heat all of the home’s hot water as well as the radiant floor.

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Restaurants like Buffet@Asia, a solar water heating system can help offset energy usage with an abundant renewable resource and can amount to significant cost savings.

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R-32 is 40% more efficient than R-410A, but with only 1/3 of the global warming potential.  Becuase less refrigerant is needed, increasing the life of the air conditioner.

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Eneref HVACR Initiative

Here’s how people responded to sustainable heating & cooling solutions.

I was totally shocked at the size of the rebate. But I was happy for it. It really made the payback pretty decent.

Gary Wood - Renewable Energy Program Manager for the Southern Nevada Water Utility View Eneref Report

We need to look for every way to save a dollar so we don’t jeopardize the critical services we’re offering.

Major Bob Lloyd - Salvation Army Clark County Coordinator. View Eneref Report

We’re pleased to make this investment in sustainability to demonstrate our commitment to this great city.

Gary Shapiro - President and CEO of CEA View Eneref Report

It made sense economically, so we jumped on it…. so that is well worth it to me.

Steve Rypka - LEED Certified Consultant View Eneref Report

I think that they are a very elegant solution.

Professor Bob Boehm - Director, Center for Energy Research at UNLV View Eneref Report

During the warmer sunny days, I have been able to keep the boiler turned off 24 hours.

Dr. Kettering - The Homeowner View Eneref Report


According to United Nations Environment Programme (UNEP), over 80 percent of greenhouse gas emissions take place during operational phase to meet various energy needs such as heating, ventilation, and air conditioning (HVAC) and water heating. Read Eneref Institute report.

  1. 39% of CO2 comes from U.S. buildings.

    The commercial and residential building sector accounts for 39% of carbon dioxide (CO2) emissions in the United States per year, more than any other sector. U.S. buildings alone are responsible for more CO2 emissions annually than those of any other country except China. Most of these emissions come from the combustion of fossil fuels to provide heating, cooling and lighting, and to power appliances and electrical equipment.

  2. $61 billion in annual energy savings from solar heating and cooling systems

    Implementing the solar heating and cooling systems (SHC) road map would create more than 50,000 good-paying American jobs across the US, and there would be an estimated $61 billion in annual energy savings for homeowners, businesses, schools, and governments. This dramatic expansion of SHC systems will permit America to generate approximately 8% of its total heating and cooling needs through clean solar energy, displacing an estimated 226 million tons of carbon emissions annually. That’s the equivalent of mothballing 64 coal plants.

    As the world population continues to grow and the limited amount of fossil fuels begin to diminish. Solar heating and cooling systems (SHC) draws from an inexhaustible energy source while displacing fossil fuels and electricity otherwise needed for heating and cooling. This reduces emissions of CO2 and air pollutants while stimulating local job and economic growth.

  3. US buildings use 36% of total energy

    Cooling a building can be expensive. In addition to cost, it places extra strain on the power grid—and our natural resources. In the U.S., buildings account for 36 percent of total energy use and 65 percent of electricity consumption, according to the Environmental Protection Agency (EPA). To offer relief from the heat, sustainable cooling and heating systems have been introduced. These units offer a smaller, quieter and more energy-efficient solution in comparison to the forced air systems prevalent in many buildings.

  4. Efficient refrigerants can reduce global warming

    The refrigerant R-32 is 40% more efficient than R-410A, but with only 1/3 of the global warming potential. If all R-410A currently in window air conditioners were replaced by R-32, the total CO2 equivalent impact would be reduced by 24%. Read Eneref Institute report.

Solar Thermal Heating in a Nevada Group Residential Home

“I was totally shocked at the size of the rebate. But I was happy for it. It really made the payback pretty decent.” — Gary Wood, a non-trustee volunteer officer of Green Chips.

FAQ: What's the right refrigerant for window air conditioners?

Chemical refrigerants, which transfer heat in cooling systems, such as air conditioners, must balance four key factors: efficiency, greenhouse gas mitigation, flammability and toxicity.

These factors inextricably work together; increasing one of them necessarily means effecting another. For example, to create a more efficient refrigerant, you must either make it flammable or contribute to global warming. The best chemical refrigerant is the one that optimizes the balance of these four factors—and the best refrigerant at this time is R-32.