Price Index
The BLS-anchored index of what HVAC equipment, refrigerant and fuel actually cost, updated monthly with nominal and inflation-adjusted series.
-
How to Convert Oil Heat to Gas: The Steps, the Chimney, the Tank and the 2026 Math
The six steps to convert oil heat to gas, from the utility check to the inspection, with the chimney liner rule, oil tank closure and EIA’s 2026/27 cost…
-
How Much Heating Oil Does a House Use? 551 Gallons a Year, 402 This Winter (2026)
An oil-heated US house used 551 gallons a year on average in EIA’s 2020 survey, and EIA forecasts 402 gallons for winter 2026-27. Regional, state and daily figures,…
-
Cash Heating Oil: What the COD Discount Saves and What Will-Call Gives Up
EIA’s heating oil price excludes cash discounts by design, so no federal series measures what COD buyers save. We work the arithmetic, then set out what will-call gives…
-
Natural Gas Prices by State: $15.60 per Mcf This Heating Season, Up 9%
Residential natural gas averaged $15.60 per Mcf over the 2025/26 heating season, up 8.7%, and why summer per-unit prices mislead. Every state, from EIA.
-
Summer 2026 Ran 25% Hotter Than Normal: The Cooling Degree Day Index
NOAA counts summer heat in cooling degree days. 2026 ran 25% above normal and passed 31 of the last 41 full years by September. The biggest anomalies hit…
-
The Heating Degree Day Index: 41 Seasons of US Heating Demand
NOAA publishes this weekly for energy traders and almost nobody else reads it. 41 completed heating seasons: demand down 7.2%, the 2025-26 season 8% below normal, and a…
-
AC Unit Cost in 2026: What Federal and National Lab Estimates Actually Show
No federal agency measures installed AC prices, but EIA, DOE and LBNL publish modelled and benchmark estimates. Here is every sourced figure, its dollar year, and how far…
-
Refrigerant Prices: What the Federal Price Index Shows
The closest federal price series to HVAC refrigerant is up 61% since 2019. What the index covers, why no agency prices R-410A, and the policies driving refrigerant costs.
-
Heating Oil Forecast Up 35% This Winter; Gas Falls
EIA’s September outlook puts heating oil 35% above last winter and residential gas 9% below. At forecast prices, oil heat costs closer to electric resistance than to gas.
-
What Heat Costs by Fuel: Gas, Propane, Oil and Heat Pumps
The cost of a million Btu of delivered heat from every common system, at 2025/26 season fuel prices and federal minimum efficiencies, with the electricity price where a…