This stack is best suited to sites processing standard commercial laundry where space is limited and both washing and drying are needed in the same location.

It is especially worth considering where:

• The site needs a matched 9kg washer and 9kg dryer.
• Floor space is limited, but the room has enough height for a 1940mm stack.
• The laundry includes towels, bedding, table linen, uniforms, sportswear or everyday personal clothing.
• A vent route to atmosphere can be provided for the dryer.
• The site can provide either two 230v, 25A supplies or two 400v, 16A supplies.

Typical applications include hotels, restaurants, launderettes, housing and apartment laundries, schools, campsites, sports clubs, spas, fitness centres, dry cleaners and small commercial laundries.

The stack saves floor space, but it still requires suitable access, room height, electrical services, drainage and dryer ventilation.

Before ordering, check:

• The daily laundry volume is appropriate for one 9kg washer and one 9kg dryer.
• The machine can be brought into the room through all doors, corridors and turns.
• The floor can support the machine and its stated maximum operating load.
• A suitable DN22 pumped waste connection or standpipe is available for the washer.
• The dryer can be ducted safely to atmosphere with adequate replacement air entering the room.

The stainless steel version is useful where appearance, cleanability or resistance to regular external cleaning is important. An iron grey version is also available where stainless steel is not required.

A different washer, dryer or stack configuration may be more appropriate where the site has heavier soiling, specialist hygiene requirements, no exhaust route or higher daily capacity.

A different model may be better if:

• The laundry includes double incontinence, faecal contamination or heavily soiled care laundry.
• The site is a care home or healthcare environment requiring a gravity drain or drain valve process.
• The laundry regularly contains animal hair, mop debris, equestrian dirt or larger particles that may obstruct a drain pump.
• No suitable external exhaust duct can be provided for the vented dryer.
• The site needs larger loads, several consecutive cycles or greater peak-hour throughput.

For care homes and healthcare sites, a&f would not normally recommend this drain-pump configuration. A gravity drain or drain valve washer should normally be assessed instead, even though the PDW 909 includes hygiene and disinfection programming.

The washer and dryer have separate electrical requirements. The selected stack should be matched to the site supply before ordering, rather than assuming the machine can be connected to a single circuit.

Reference programme times depend on the selected programme, load size, incoming water temperature, water pressure, electrical variant, exhaust arrangement and room conditions.

Key installation checks include:

• 230v version: one 230v, 25A supply for the washer and one 230v, 25A supply for the dryer.
• 400v version: one 400v, 16A supply for the washer and one 400v, 16A supply for the dryer.
• Cold and hot water connections for the washer.
• DN22 pumped drainage positioned within the manufacturer’s installation limits.
• A correctly sized dryer exhaust route and adequate room make-up air.

a&f can confirm access, supply ratings, drainage, ducting, ventilation and final positioning as part of a site survey.

The Miele PDW 909 is the relevant replacement route for the older Miele PWT6089 washer dryer stack.

Replacement should not be treated as a direct swap without checking the installation. The electrical ratings, overall dimensions, drainage position, dryer exhaust route, connection layout and controls may differ from the older machine.

Previous model search term: PWT6089

A site survey allows a&f to confirm whether the existing services and ducting can be reused or whether alterations are required before installation.

The PDW 909 washer includes disinfection programmes, temperature monitoring, a disinfection rinse and Miele-tested virucidal performance. The machine is also listed with CE, UKCA, VDE, VDE-EMC and IPX4 ratings.

The wider laundry process must still consider:

• Correct separation of clean and dirty laundry.
• Validated programme settings, temperatures and holding times.
• Appropriate detergent and chemical dosing.
• Staff handling, training and documented procedures.
• The suitability of drain-pump drainage for the actual soiling being processed.

Hygiene outcomes depend on the complete process, including machine selection, programme setup, segregation, staff procedure, detergent choice, temperature validation and site handling. The machine alone does not guarantee compliance.