- Energy related Products (ErP) Directive (effective 26th September 2018) legislates boilers must not exceed a new lower threshold of Nitrogen Oxide (NOx) emissions.
- Comes amid efforts by the Clean Growth Strategy to reduce pollution and improve air quality,
- Oil-fired boilers with NOx emissions exceeding 120mg/kWh, and gas or LPG boilers with NOx emissions that exceed 56mg/kWh, can no longer be installed.
- Ground source heat pumps produce no point of use emissions and are therefore exempt.
- Legislation is intended to help achieve the EU’s targets of lowering energy consumption by 20% and increasing the share of renewable energies by 20% by 2020.
A ground source heat pump extracts naturally occurring heat from the ground (or water) and is an electrically driven device with no combustion. There are therefore no point of use emissions of any pollution – particulates, NOx or SOx (and no point of use CO2 emissions either).
There are estimated to be 900,000 domestic gas boilers in London. If these were all replaced with ground source heat pumps, we could reduce the NOx emissions in our city alone by over 400 tonnes per annum compared to even the best gas condensing boilers.