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Maximize Energy Efficiency

Effective insulation is one of the most important factors in the energy efficiency and comfort of any building. By air sealing your home, adding insulation or replacing old windows with Energy Star® rated windows, you create a thermal envelope that encloses heated or cooled living spaces. This not only maintains comfort, it also saves energy, and helps lower your energy bills.

To increase the energy efficiency of your home, you should insulate all exterior walls that separate conditioned spaces from unconditioned spaces, including areas like knee walls that open to attics or garages. Insulating attics closes the thermal envelope from above. To make a more "secure" envelope, make sure you fill all cracks or openings with insulation.

Johns Manville's Formaldehyde-free™ fiber glass insulation products - including ComfortTherm®, EasyFit®, MR® Faced, Kraft-faced and Unfaced - offer outstanding thermal efficiency and are Energy Star® rated. JM products in North America incorporate an average of 25% recycled content. And of course, they all promote better indoor air quality and a healthier indoor environment because they're made without formaldehyde.

Our JM Spider™ Custom Insulation system delivers superior thermal performance, achieving up to an R-15 in 2x4 wall cavities and an R-23 in 2x6 wall cavities. It sprays in to fill all gaps and voids where energy can escape, even in the toughest-to-reach nooks and crannies. By investing in JM Spider insulation when you build your home, you will reduce the cost of operating your home. Ask your builder or contractor about installing JM Spider insulation if you're building a new home.

Ductwork can be a source of energy loss, too.

Typical systems with unsealed or uninsulated sheet metal ducts that run through attics or crawl spaces can lose up to 40% of the heating or cooling energy that passes through them. The energy can be lost by simple conduction through inadequately insulated sheet metal ducts. It can also be lost through holes or leaks in seams that have not been properly sealed. For more information on how energy can be lost, click here.

Properly designed and installed duct systems can have efficiencies of 80% or more for little or no additional cost, potentially saving a homeowner up to $200 or more per year in heating and cooling costs. Efficient duct system installations may also reduce equipment size, further saving money for new or replacement equipment.

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Maximize Energy Efficiency

Ductwork can be a source of energy loss, too.