Maintenance Costs Savings

Further to a project review it was commented by the reviewer that” the list of potential low-cost/no-cost energy efficiency and conservation upgrades and programmatic changes did not include the maintenance cost savings resulting from these improvements and requested that we provided revised documentation containing all potential savings resulting from each potential improvement”. However, the potential low-cost/no-cost energy efficiency and conservation upgrades will result in energy savings but savings in maintenance costs are not expected. How should we manage this issue, as arbitrarily estimating maintenance costs where those are not expected cannot be a solution to the problem. Would it be accepted if we clearly clarify that no maintenance cost is expected from the energy savings occurred due to the potential energy efficiency upgrades?