The global heat meter market size was valued at USD 1.22 billion in 2024. It is projected to reach from USD 1.31 billion in 2025 to USD 2.28 billion by 2033, growing at a CAGR of 7.2% during the forecast period (2025–2033). Heat meter is a device used to measure the amount of energy consumed in transferring hot fluids from one point to another.