Cape Cod Biofuels - Sandwich's Licensed HVAC Services

We deliver a range of ASTM-certified biodiesel blends directly to homes in Sandwich and across the Cape. Our most common residential blends are B30 and B40 (30-40% biodiesel, 60-70% conventional heating oil), which provide excellent performance and reduced emissions. We also offer B20 and higher blends like B50 and B99 for specific needs. As Massachusetts's only ASTM-certified producer, you can trust our fuel meets all quality and safety standards for your heating system.

Yes, absolutely. Thermostat malfunctions are a common issue we handle for local homeowners. Our HVAC service team can diagnose the problem, whether it's incorrect calibration, wiring issues, or a need for replacement. We'll ensure your thermostat accurately controls your heating system for consistent comfort and efficiency. For automatic delivery customers, our Wireless Tank Monitor also helps prevent issues by ensuring you never run out of fuel, which can sometimes be mistaken for a thermostat problem.

Our recycling process creates a closed-loop system that benefits the entire community. We collect used cooking oil from over 1,000 local restaurants, preventing it from entering landfills and local wastewater systems. At our Sandwich facility, we convert this waste into clean, renewable heating fuel. This not only provides homeowners with a sustainable fuel option but also supports local businesses by offering a responsible disposal solution. It's a true local cycle, turning a waste product from your favorite eateries into reliable warmth for your home.