Heat Meters in the UK RHI Programme: Secure Your Tariff – Replace Now!
Anyone participating in the UK government’s Renewable Heat Incentive (RHI) programme, whether Domestic or Non-Domestic, receives financial compensation. However, to continue receiving this support, certain obligations must be met. One of these requirements is becoming increasingly important: the 10-year replacement rule. Ofgem (Office of Gas and Electricity Markets – the regulator for the UK electricity and gas markets) has long reminded participants that heat meters must be replaced every ten years at the latest. If this does not happen, payments under the Non-Domestic RHI scheme may be withheld. To avoid this, Engelmann Sensor, the global heat meter market leader is working closely with the UK’s leading metering expert, MWA Technology. Don’t wait—if you’re unsure about your system, have your heat meters inspected now.
When must the heat meter be recalibrated or replaced?
First of all: this regulation applies to participants in the Non-Domestic RHI (NDRHI), as this scheme pays out over a longer period (20 years) compared to the Domestic RHI (DRHI), which pays over 7 years. Ofgem states that ten years after the initial installation or after the last calibration, a new calibration must take place. If a device can no longer be calibrated, what is most likely the case, it must be replaced. If a replacement has taken place, the ten-year period starts anew. If a manufacturer specifies a different calibration interval, programme participants must adhere to that period, provided it does not exceed ten years. In all cases, the heat meter must be RHI-compliant. If not, payments may also be suspended. Engelmann heat meters are compliant with the NDRHI under the EN1434 standard. Whether calibration or replacement is the more sensible choice depends on the type, age, and condition of the device. In most cases, replacement is the more economical option, especially if the current device no longer meets today’s requirements or if recalibration is technically complex. MWA Technology is here to help.
Why is this necessary and what happens if you don’t act?
The RHI programme has been running for over a decade. Many heat generation systems installed under the scheme have been in continuous operation for years, often using the original meters. To ensure that measured consumption remains accurate and traceable, Ofgem introduced this regulation. Non-compliance with this obligation is considered a breach of contract by Ofgem. This can lead to suspension or even permanent cancellation of payments. Retroactive sanctions are also possible. To avoid this, timely action is essential—and MWA Technology is here to support you.
Background: What is the RHI?
The Renewable Heat Incentive was a UK government scheme to support renewable heat technologies. It was launched in 2011 for non-domestic buildings and extended to domestic properties in 2014. The goal was to encourage investments in technologies such as solar thermal, heat pumps, and biomass boilers. New applications for both schemes are now closed. However, payments under the NDRHI scheme will continue at least until 2041. Until then, plant operators remain subject to ongoing obligations—including the 10-year rule for recalibrating or replacing heat meters. Additionally, there is a mandatory reporting requirement for any changes made to heat meters or associated systems.
A strong partnership: Engelmann and MWA Technology
Together with our experienced partner MWA Technology, we offer a reliable solution for meter replacement or calibration. MWA Technology has been firmly established in the UK market for over 20 years and is highly familiar with Ofgem’s requirements. Engelmann, meanwhile, has been active in heat meter production for nearly 50 years and is now the global market leader.
Further resources
UK Heat and Buildings Strategy
Follow-up scheme: Boiler Upgrade Scheme
Other government funding programmes
Everything you need to know about meters within the RHI (Ofgem)
Environmental and social schemes of the UK
