Ask a hospital services manager what cleaning costs, and you will usually get one number: what the contractor bills each month. That number leaves out the shifts the cleaning team spends on the job, the consumables bought to do it, the water that goes down the drain and the downtime while a piece of equipment sits out of circulation. A facility that wants to compare methods or justify a change of process needs the full landed cost per cleaned item, not the invoice. The steps below are the ones a biomed or environmental-services team can run in a week with existing records.
1. Choose what you are costing
A cost per hour is useless if the workload changes week to week. Pick a counting unit that matches how the work is actually scheduled:
- A single item, such as one hospital bed frame, one IV pole or one wheelchair — best for high-volume, repetitive surfaces.
- A room or bay of equipment, such as everything in one examination room — best when cleaning is scheduled around room turnover.
- A shift of output, which is the practical unit when one operator covers a ward on a fixed rota.
Write down what counts as finished. On equipment exteriors that normally means the housing, controls, handles, the stand or base, and any accessory brackets — the surfaces hands touch between patients.
2. Collect the cost lines that actually move
For exterior cleaning of medical devices, six lines carry most of the money. Capture each one from payroll, purchasing and utility records rather than estimating them, because estimates are where comparisons go wrong.
- Direct labour: the operator minutes on the task, multiplied by the loaded hourly rate. Include walking, filling, draining, and moving the machine — not just contact time.
- Consumables: wipes, sprays, disinfectant, and the pouches and liners the team gets through in a shift.
- Water: from the metered volume, or from a measured fill on a machine whose tank capacity is on the data plate.
- Energy: heat-up plus run time. Where the machine's heating power is published, hours at that rating give a defensible figure; where it is not, the utility bill for the area does.
- Equipment: purchase price spread over the service life, plus seals, hoses, filters and the service contract.
- Downtime: the hours an item is out of service while it is being cleaned and dried, valued at the cost of covering without it.
Downtime is the line facilities forget, and it is often the one that changes the ranking of two methods. A surface that is wet and cooling at the end of a process is not back on the ward.
3. Build the model on a two-week sample, not a year of averages
Time three operators on a normal day each, and count what they actually clean. Two weeks covers a weekday–weekend pattern and enough variety in the equipment mix that a single unusual day will not distort the result. Keep the sample small enough that the team will let you watch it.
Then compute landed cost per cleaned item: labour, consumables, water, energy and equipment divided by items, with downtime reported next to it rather than folded in. Reporting downtime separately keeps the model honest — a cheap process that ties up a bed for half a day is not cheap.
4. Test the questions that drive the number
Once the baseline exists, the useful comparisons are narrow:
- How much of the labour line is travel and preparation rather than cleaning? That is where a machine that carries its own water, power and extraction changes the picture.
- What does the consumables line look like over a year at current volumes, and does the process require a chemical at all?
- What water does the process use per item, and is any of it discharged at a temperature or with a load that carries a treatment cost?
- Does the process shorten the time an item is out of service, and what is that worth against a replacement unit?
5. Read a high-temperature steam option against that model
PowerDe's hand-pushed and fixed cleaning machines are the models its listing places in medical use: the listing describes them as high-temperature, high-pressure machines with dry- and wet-steam modes, used for cleaning and disinfecting hospital beds and medical machinery. The hand-pushed PowerDe HMW3 is listed for medical equipment steam cleaning in a variant without battery and a variant with battery; the fixed 220 V machine sits in the same cleaning equipment series.
Against the cost model above, a steam machine's money sits in a different place from a bucket-and-cloth process. The consumables line shrinks, because the process relies on heated steam rather than a detergent to lift soil from a housing. The energy line grows, because the machine is a heater. Labour is the line worth measuring by hand: PowerDe's supplier-side data for these models is thin, and any figure quoted at the sales desk for tank capacity, heating power or steam temperature should be confirmed against the machine's own data plate before it enters your model — PowerDe's own site shows the model designation for its fixed 220 V machine inconsistently between the listing and the description, which is enough to make you check before you write it into a budget.
Two things about a high-temperature, high-pressure machine do not follow from the price sheet and should be settled in a trial, not in a spreadsheet: whether the surface is back in service faster than under the current process, and how the machine behaves on the equipment you actually have, including anything with an ingress-protection rating that a pressure stream could challenge.
6. Run the trial before the purchase order
A trial is one shift with one machine on a defined list of items, with the same two observers timing the same tasks as the baseline. Ask the supplier to specify, in writing and for the exact unit shipped, what the machine heats, how long heat-up takes, and what service parts wear out. Then put the trial numbers in the same spreadsheet as the baseline. If the landed cost per item does not improve, or the downtime line does not fall, no amount of attractive literature changes the answer.
The point of the whole exercise is that a cleaning budget for medical equipment exteriors is a set of trade-offs between labour, consumables, water, energy and downtime. Fix the counting unit, measure the six lines, and the case for or against any machine argues itself.
