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If the efficiency figures of your systems are not entered correctly you may come across errors running the PartL calculation.
When there is no percentage character beside efficiency variables, these must be added as factors - eg 0.65 as below for Generator Seasonal Efficiency for a hot water.
Other efficiencies allow for a percentage figure to be entered, as with HVAC heating efficiency below:
On these, you can also find a dropdown to switch between percentage or ratio as you wish.