A supplier who cannot quote an accessory list is not really quoting a cleaning capability. The wand, nozzle, brush, extractor and hose you attach decide how much heat reaches the surface and how much liquid is left behind, so the same machine can behave like a different process depending on what is fitted. Before you compare accessories, compare the methods around them: dry wipe, vacuum, conventional washing and heat-based steam cleaning each fail for different reasons, and the accessory question only becomes answerable once you know which method is supposed to do the work.
Compare the methods before you compare the accessories
Dry wiping and vacuuming remove loose soil and are the cheapest option on almost any surface. Their limit is bonded soil: road film, oxidised grease, dried sugar and protein films are not moved by friction alone, and pushing a cloth over them mostly relocates the deposit. A commercial steam cleaning equipment approach addresses that second category, because the cleaning action comes from heat at the surface rather than from scrub pressure.
Conventional cold washing with detergent handles a wide range of soils but consumes water, produces runoff that has to be collected and usually needs a drain at the work position. Steam and hot-water methods work where a drain is not available, so the honest comparison is not which method is stronger but which one your site can actually support. Ask the supplier to state, in writing, which of these four mechanisms each accessory is intended to use: mechanical abrasion, vacuum extraction, chemical action or heat. An accessory whose mechanism is not stated is a marketing item.
Score each accessory against six questions
Write the six questions once and run every accessory through them, including accessories from competing suppliers. The first question is reach: can the accessory get to the surface without dismantling the asset, and does it need a hand to stay in a confined space? The second is heat delivery: does the supplier state the temperature and pressure at the nozzle, or only at the boiler, since the figure at the nozzle is the one your soil sees.
The third question is liquid load. Dry steam carries little free water and leaves surfaces short of saturated; wet steam and hot-water modes carry more. The product page for the PowerDe HW02 steam cleaner lists a switch between dry and wet steam, and the mobile PWD01, PWD02 and HMW2 listings state dry-steam, wet-steam and hot-water modes. That difference matters operationally, because liquid load decides how much runoff you must collect, how long a surface takes to dry and whether the position has a drain at all.
The remaining questions are containment, interface and wear. Containment: where does the loosened soil go, and does the accessory include extraction or does the operator follow with a cloth. Interface: is the fitting a standard size, and can your team fit and remove it with gloves on, without tools. Wear: what is expected life on the surfaces you actually clean, and is a replacement price and lead time quoted now rather than after the first failure.
Do not let an accessory claim a job the machine was never specified for
The most expensive comparison error is believing that a nozzle makes a machine suitable for a task its published specification does not cover. The HW02 detail page describes vehicle exterior cleaning at stations and parking areas, interior vacuuming and disinfection, and engine-compartment work, and publishes 220 V working voltage, 6 kW heating power, an 80 L SUS304 tank, a 1/2 inch four-point internal-tooth tap-water inlet and overall dimensions of 1,200 x 800 x 1,200 mm including handles. Those figures define the installation and duty envelope, not a claim about every surface in your facility.
The same caution applies to any accessory sold for an industrial position. If the specification does not state the working medium for the accessory, treat the accessory as unproven for that position and ask for the machine and accessory to be tested on your own soil. Where the position needs something outside the published envelope, ask about customized steam cleaning equipment instead of buying a standard attachment from a parts list and hoping for the result.
Fit, service and replacement cost decide the real price
Compare accessories as installed items, not as photographs. Ask the supplier to confirm which machine models and modes each accessory fits, whether the fit is on the current production version of your machine, and whether an adapter is required. Confirm the working-voltage and water-supply conditions for the assembly: the HW02 product page lists 220 V and a tap-water inlet with a four-point internal-tooth joint, so accessory pipework and extension hoses have to be assessed against those conditions before you commit.
Then price the ownership, not the purchase. Seals, hoses, brush blocks and nozzle tips are consumables on any heat-based system, and scale from hard tap water reduces delivered performance over time. Ask what is included in a service kit, how the protective functions behave when water supply is interrupted, and what the operator is expected to do when a protection trips. The HW02 listing names leakage, short-circuit, high-temperature, high-voltage and water-shortage protection items; the useful question is what the reset procedure is and who is authorised to perform it, not how many items are printed on the page.
Run a same-day trial on your own worst surface
A comparison that is decided in a showroom is not a comparison. Pick the two worst surfaces you normally argue about, and clean them with your existing method first so you have a baseline you already trust. Then repeat with the candidate accessory using fixed parameters that you write down before the trial starts: mode, nozzle type, standoff distance, travel speed, number of passes and dwell time. Change one parameter at a time, and stop when a parameter set works so it can be written into the work instruction.
Measure four things during the trial and nothing else: time to finish each surface; number of refills or reheat stops; volume of water introduced and how much had to be collected; and how many surfaces needed a second pass. Photograph the same position from the same angle with a work order reference so the record can be read by whoever takes the next shift. If the accessory cannot beat your baseline on those four measures, it is not the right accessory for that site regardless of its list price.
Put the trial result into one controlled sheet
Close the comparison with a single page that lists, for each surface, the accepted parameter set, the excluded positions with the reason, the accessory and its replacement part reference, and the person who signed the acceptance. One line per cleaned job gives you the audit trail you need when a surface is reported as poor, and it stops the next buyer from repeating the trial you have already paid for.
Send that page, the photographs and your measured four figures to the supplier rather than asking for a model number. If you need an accessory set built around your own surfaces and utilities, send the sheet and the site constraints through the contact page and ask for written answers on delivered temperature and pressure, the liquid load of each mode and the consumable replacement terms.
