[bmdpat]
YC S26 · Bonus demo (climate is off-RFS)

Run the heat-pump math from your utility bill.
Your usage and rates decide the answer.

Federal 25C credit not modeled after Dec 31, 2025 (IRS 25C guidance). Upload a gas or electric bill and estimate unsubsidized payback from bill-extracted usage, ZIP climate assumptions, and labeled model fallbacks.

Bonus demo · off-RFS

Climate tech is off YC's Summer 2026 RFS. This demo tests whether unsubsidized heat-pump payback pencils out from a real bill. Federal 25C credit not modeled after Dec 31, 2025 (IRS 25C guidance).

HeatCheck — Does a heat pump pencil out for your bill? (YC S26 bonus demo) | Patrick Hughes