Heating, ventilation and air conditioning (HVAC) systems include components such as furnaces, air conditioning, water heaters, fans, radiators, dehumidifiers, thermostats, wood burning and pellet stoves, and more.  Many improvements have been made in HVAC systems in relation to more eco-friendly and green technologies.  Choices now include optimal air, radiant heat, geothermal and energy recovery, and more.  Choosing environmentally friendly and energy efficient HVAC materials, products and systems can provide substantial savings in energy costs over the long term.  They also can minimize the harmful effects that traditional materials, products and systems have had on the environment.  Rising energy costs are reducing the payback period for capital improvements and expenditures that will not only generate future cost savings, but improve energy performance and efficiency and lead to a greener planet.  Providers listed in this section are committed to offering environmentally friendly HVAC products.