Job this solves
Estimate annual and multi-year maintenance from your own intervals and costs.
Formula
Annual = Σ (cost × 12 ÷ interval months); total = annual × years owned.
Assumptions
Defaults are starting points, not recommendations. Outputs inherit your inputs.
Common questions
Where do intervals come from?
Manufacturer manuals vary by water hardness and use. Enter the schedule you actually follow.
Is this a service contract quote?
No. It is a planning estimate only. Professional service costs vary by region.