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2. Carl Moyer Memorial Air Quality Standards Attainment Program

   en.wikipedia.org/wiki/Carl_Moyer_Memorial_Air...

   Up to 100% of the retrofit costs—including installation (installing particle traps or diesel oxidation catalysts) Up to 85% of repower costs, including installation. Repowering is the replacement of the in-use engine with a new engine. Up to 25% of new vehicle or equipment purchases that are cleaner than the law requires

3. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   HVAC ventilation exhaust for a 12-story building An axial belt-drive exhaust fan serving an underground car park. This exhaust fan's operation is interlocked with the concentration of contaminants emitted by internal combustion engines. Mechanical, or forced, ventilation is provided by an air handler (AHU) and used to control indoor air quality.

4. Exhaust system - Wikipedia

   en.wikipedia.org/wiki/Exhaust_system

   Exhaust system of the Opel Corsa B 1.2 petrol Exhaust manifold (chrome plated) on a car engine. An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system ...

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

6. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. Tuned exhaust - Wikipedia

   en.wikipedia.org/wiki/Tuned_exhaust

   A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.

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9. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   While older air-source heat pumps performed relatively poorly at low temperatures and were better suited for warm climates, newer models with variable-speed compressors remain highly efficient in freezing conditions allowing for wide adoption and cost savings in places like Minnesota and Maine in the United States.