Make sure that the systems you apply to your ''System'' and ''Aux. Vent System'', if different to the ''DHW System'', do not have 'Hot Water' tab filled out for storage etc. as it will double count the hot water usage and your DHW will be much higher.
Best way to verify if you've not made any ...
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- by AG-KH
- Tue Nov 04, 2025 2:03 pm
- Forum: Part L2 - England & Wales
- Topic: Failing to achieve Part L compliance on DHW
- Replies: 1
- Views: 12769
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