17 Impact on Local Air Quality

Air conditioning and cooling - KBCN0373

Energy used for air conditioning and cooling systems should not be included when assessing NO_x emissions.

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CHP NOx emission conversion - KBCN0592

If the CHP manufacturer cannot provide the NOx emissions in mg/kWh it is not possible to award any credits. The CHP manufacturer must provide the NOx emissions in mg/kWh, the conversion factors provided in the Technical Manual can only be used for boilers.

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Decorative gas/ethanol fires - KBCN1301

Although fires may be decorative, if they are permanent features of the home that burn fuel to produce heat, they will have an impact on local air quality. They should be assessed in the Impact on Local Air Quality issue.

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District Heating - KBCN1302

Where a project is connected to a district heating system which is outside the scope of the project or the wider development (for example phased developments) and is mandated by a local authority or other statutory body, the system does not need to be included in the assessment and 11 credits can be awarded by default. This is on the basis that the development's design team do not have control over the specification of the system. Where this is the case, evidence must be provided to demonstrate this. Where the development's design team do have control over the specification of the system, then it must be assessed.  

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Emissions – measuring heating demand - KBCN0182

Emissions for all heat sources should be measured under normal operating conditions which are when all heat sources from the building plant are operating to their maximum design heat outputs to meet the building's heating demands. Where plant is designed to operate below maximum capacity, for example multiple or modular systems or standby boilers,the emissions should still be calculated for the plant operating to meet the building’s heating demand. Any redundant capacity or standby plant should not be included.  

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