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With winter in full swing, households across the country have dialed their thermostats up, but the fuels and technologies keeping homes warm vary widely by region. This is mostly driven by climate, historical prices, and year of industrialization/electrification 🔌💡

Grid Status

@gridstatus.io

The vast majority of heating in ISO-NE is fossil, split between heating oil and natural gas . The reliance on natural gas, particularly in densely populated areas in Eastern MA, along the Connecticut River, and in the NYC suburbs, place added strain on pipeline supply during cold weather events.

19/12/25, 2:42 pm1 repost0 likes

Grid Status

@gridstatus.io

19 Dec 2025

Similar to nearby New England, NYISO’s heating is dominated by oil and natural gas . While pipeline limitations are not as big of a concern as in ISO-NE, extended cold snaps and high demand in zones J and K can drive up spot pricing.

Grid Status

@gridstatus.io

19 Dec 2025

We took a closer look at each region’s primary heating source and the market outcomes that result. Check out our Insights feed over the next few weeks for more ISOs and deep dives into zonal heating trends and more. www.gridstatus.io/insights

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