Putting our energy into saving yours.

(631) 647-4701

Serving Nassau & Suffolk Counties

Award Winning Leader in Energy Efficiency

Long Island's #1 Home Performance Company
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Oil to Gas Conversion

Save up to 70% on your energy bills when you convert your heating oil system to natural gas and upgrade your home to be energy efficient.
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Home & Attic Insulation

Powersmith offers a full range of insulation options ranging from spray foam to cellulose to rigid insulation.
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Save on Energy Costs

with Powersmith's FREE Home Energy Audit--a building science-based approach to evaluating your home's performance.
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Guaranteed Home Energy Savings!

Powersmith can help you save 200-500 gallons of oil per year AND make your home more comfortable!

Thanks to modern building science, you no longer have to turn the thermostat down to save money on your oil bills. For maximum energy efficiency and comfort, your home should be properly sealed and insulated, with all heating and air conditioning systems working properly.

Schedule a FREE home energy audit today!


Our building science-based comprehensive energy audit identifies air leakage, energy efficiency fixes and health and safety issues. Learn More.

Yes, you can have both: a more comfortable home that is healthier for your family with lower energy bills. Learn More.

Long Island Residents have some of the most aggressive incentive and financing programs in the US. We Take Care of it All. Learn More.