What you run now
The replacement
Store economics
Results
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Gas saving is modelled from the extraction change only. Repair saving assumes the 2-year parts warranty removes most of the first two years of spend on replaced units.
When a retool actually pays
Four benefits stack: lower gas from higher extraction, lower repair spend, recovered downtime, and the volume lift that comes from a floor that looks and works like it is maintained. The first three are measurable. The fourth is real but softer, so run the model at zero lift as well and see whether it still clears.
The age threshold
Most vended washers become uneconomic somewhere between years twelve and eighteen — not because they stop working but because bearing and seal replacements start clustering and the parts get harder to source. If your annual repair spend has crossed roughly 15% of replacement cost, the machines are telling you something.