Vacuum-mop running costs: rollers, filters and detergent

Identify replacement parts before comparing prices

Start with the exact roller, filter and approved solution references. A part advertised for a whole range may need further checks. A cheap incompatible accessory is no basis for a budget. Save the manufacturer link, reference and check date.

Separate supplied consumables from future purchases. An extra roller may meet an initial need but does not establish future availability. Avoid counting the same item twice when it appears both in a kit and separately.

Turn bundle contents into a useful cost

Match each kit price to the number of rollers, filters or bottles and their volumes. Add known delivery charges for your chosen ordering pattern. One combined order and several small orders may cost differently; make the assumption explicit.

Do not assume every kit item needs replacing equally often. Keep unknown intervals editable. “Assuming two purchases” is more accurate than presenting two annual replacements as a manufacturer requirement.

Choose a period and make assumptions visible

For a constant annual budget, three-year cost combines the purchase with three years of consumables. If years differ, calculate them separately. Repairs, batteries, water and unlisted delivery costs must be explicitly included or excluded, never silently treated as free.

Try lower, central and higher scenarios using assumptions you understand. The spread shows sensitivity to those assumptions; it does not predict appliance lifespan.

Do not turn rated power into an electricity bill

Watts alone do not establish energy consumed by a complete session. Operation, charging and dock cycles vary. A kWh-per-session value needs an adequate measurement or a source defining its scope and conditions.

Leave this field unknown when evidence is missing. Zero means no consumption, which is a different claim. The Homavise calculator separates reader-entered assumptions from documented product specifications.

A purely hypothetical worked example

For illustration only, assume a US$300 purchase, US$40 of consumables per year, 0.10 kWh per session, three sessions weekly and US$0.25 per kWh. Three-year energy cost is 0.10 × 3 × 52 × 3 × 0.25 = US$11.70. The total of these items is US$431.70.

These are invented teaching inputs in US dollars, not a currency conversion, current tariff or measurements for a catalog product. Unknown consumables leave the total incomplete; changing session frequency changes energy cost. Repairs and appliance replacement are excluded.

Consider both the budget and its uncertainty

When purchase prices are close, check which parts have identified references and how many assumptions remain. A cheaper appliance may still make sense, but understand what could change the result. Our method does not assume an expensive appliance lasts longer.

The pilot specifications do not yet contain verified annual costs for every model. We therefore publish no cheapest-over-three-years ranking. The useful service is a transparent formula, parts checklist and a consistent way to compare your own quotes.

Practical answers