Posted: March 23, 2026
Heating oil can generate a lot of heat energy. A single gallon produces about 138,500 Btu. When you pair that superior energy content with the exceptional efficiency of today’s oil-powered equipment, you can enjoy exceptional home comfort — no matter how icy cold it gets in Western Massachusetts.
At FSi Oil Services, we’ve spent decades helping families in Westfield and other communities in our region to get the most from their oil HVAC systems. In this article, we’ll discuss the various oil-fired heating and hot water systems you can use in your home.
Oil-fired furnaces use forced-air heating to keep your home warm and comfortable. The system pulls in cool indoor air, heats it in a combustion chamber, and transfers that warmth through a heat exchanger. A blower fan then pushes the heated air through ductwork and into each room through vents.
Furnaces are known for delivering quick, consistent heat throughout the house. When properly maintained and fueled with high-quality heating oil, they provide dependable performance and strong efficiency during even the coldest New England winters.
Oil-fired boilers use a different approach called hydronic heating. Instead of warming air, they heat water using a heating oil burner. The hot water or steam is then distributed through pipes to radiators, baseboards or radiant floor systems to heat your living spaces.
Boiler systems offer steady, even warmth without the need for ductwork. Many homeowners appreciate the quiet operation and comfortable heat that hydronic systems provide, especially during extended cold spells.
Combination boilers, or “combi” units, provide both space heating and domestic hot water in one compact system. These high-efficiency condensing boilers include a built-in secondary heat exchanger to supply hot water for showers, sinks, and appliances.
During the winter, a combi boiler heats your home and your water as needed. In warmer months, it operates only when there’s a call for hot water. This space-saving solution can reduce equipment footprint while delivering energy savings and reliable year-round comfort.
Traditional storage tank water heaters remain a popular choice. Typically holding 30 to 50 gallons, they keep water heated to a preset temperature until it’s needed. When you turn on a faucet, hot water flows out while cold water refills the tank to maintain the supply. These systems are cost-effective upfront and easy to service.
Indirect-fired water heaters offer even greater efficiency by pairing with an oil boiler. Instead of using a separate burner, they draw heat directly from the boiler to produce hot water. The result is exceptionally low operating costs and a strong, consistent hot water supply — ideal for households with high demand.
Keeping a New England home warm requires reliable equipment and dependable fuel. If you’re ready to upgrade your heating or hot water system, installations are handled by our sister company, Clean Climate HVAC, the region’s trusted experts for high-efficiency system design and installation.
And no matter what equipment you rely on, the FSi Oil Services team is always on call for premium heating oil delivery and professional maintenance. Contact us today to join our family of customers!
