Get clean air and your money back 6 times: Huge health savings by retrofitting ASDS in cities


According to UK government data, every Euro spent on retrofitting NOx-reducing technology on diesel vehicles in cities will save 2,6 Euros on hospital bills. And with ASDS, the health savings can be worth 6 times the investment.

If you visit London and take a walk across the Westminster bridge to see Big Ben, chances are that you will inhale more than twice the amount of toxic NOx allowed by the EU.

London is fighting dangerous levels of NOx, and the Mayor Sadiq Khan recently announced that 5,000 buses will be retrofitted with NOx-reducing technology to bring down NOx concentrations in the city. Amminex has been appointed as one of five suppliers to the very ambitious program for reducing NOx.

Read more: Amminex chosen to clean London’s toxic air

But apart from cleaning the air for the Londoners, Sadiq Khan has yet another reason to retrofit buses: It makes for a very good business case when you compare across various measures to reduce NOx.

Retrofitting saves money on health budget
The Department for Transport and The Department for Environment, Food and Rural Affairs have published a background report for the UK Air Quality Plan for tackling nitrogen dioxide. Here, the cost of retrofitting vehicles is compared to a national scrappage scheme and incentivizing consumers to buy ultra-low emission vehicles such as hybrids or all-electric cars.

As the only measure, retrofitting provides a positive return on investment. Spending 170 million pounds on retrofitting buses, heavy goods vehicles and black taxis will save the national health budget 440 million pounds, while the alternatives cost more than the calculated benefits.

In other words, the report concludes: Every pound spent on retrofitting NOx-reducing technology, will save 2.6 pounds on hospital bills.

Even more savings with ASDS
The strong business case of retrofitting only gets stronger with rising population density, as more people are affected by the NOx emissions. Another background report values the average health damage cost of 1 kg NOx emitted to 25 pounds, while the cost in densely populated areas of central London rise to 115 pounds. 

And data from the city of Copenhagen show that the health benefit of installing ASDS technology is even better than the 2.6 to 1 ratio calculated by the UK Government.

“We know exactly how much NOx our ASDS technology has removed from our 300 buses in Copenhagen, because our NOxTracker tool continuously logs performance on all vehicles. And since we also know the cost of the installation, it is just a matter of doing the math to see the cost per kilo removed NOx,” CEO Annika Isaksson explains.

Read more Live NOxTracker expands coverage

Over the expected six-year life span of a typical ASDS retrofit solution, the accumulated cost of installation, service and refilling cartidges corresponds to a price of 5 Euros per kilogram removed NOx.

This is six times lower than the average NOx damage cost of 30 Euros per kilo calculated by the British government. And if the calculation is done for densely populated areas, the ratio increases to more than 20 to 1.

“All mayors in large cities should take note of this. How many investments will give you your money back six times in just six years, while at the same time improving the health of people living in the city,” Annika Isaksson asks rhetorically.