World Clean BizGlobal Cleaning Industry Intelligence

Independent Technical Reference

Heat Pump Dryer

Heat-pump dryer airflow, refrigerant loop and buyer checks

This profile separates rated load, closed-loop air and refrigerant architecture, condensation, energy test basis, ambient limits, lint and heat-exchanger care, stacking and service parts so buyers can compare exact heat-pump dryers without treating ventless as a complete specification.

Included
  • Household electric heat-pump tumble dryers
  • Compact and full-size ventless heat-pump dryers
Excluded
  • Vented resistance dryers and non-heat-pump condenser dryers
  • Washer-dryer combos and commercial drying equipment
  • Unverified refrigerant, filter, stacking or cross-model parts

First published 2026-08-09 · Last verified 2026-08-09

This independent category reference is not electrical, textile-care, refrigerant-service or installation advice. Confirm the exact regional model, manual, load, cycle, supply, condensate route, ambient limits, stacking kit, lint and heat-exchanger maintenance and service-part numbers before procurement or use.

Official equipment reference
Bosch heat-pump dryer and matching washer displayed with their doors open
Official Bosch image showing a heat-pump dryer beside a washer; pairing, stacking and accessory compatibility remain exact-model checks. Official image source
Heat Pump Dryer key facts
FactTechnical referenceScope boundary
Category boundaryHousehold tumble dryer with a closed-loop refrigerant heat-pump drying systemHousehold electric tumble dryers; non-heat-pump condenser and vented dryers excluded.
Buyer verificationMatch load, test method, supply, condensate route, ambient limits, maintenance and stacking kit to the exact modelExact regional model and installation site.

WCB explanatory visual

Heat Pump Dryer working system

An original system map synthesized from reviewed operator manuals. It explains functional flow, not a universal machine architecture.

  1. 01

    Load and airflow

    Door, drum, drive, fan, ducts and lint filtration

    Turns the load and circulates process air through the textiles.

    EvidenceOfficial models publish front-load drums, ventless airflow and model-specific lint care.

    ScopeExact load, program and model.

    Verified2026-08-09

    Sourceslg-dlhc5502, bosch-wqb245, miele-txr860, samsung-dv90

  2. 02

    Heat-pump loop

    Evaporator, condenser, compressor, expansion device, refrigerant and heat-exchanger surfaces

    Removes moisture from recirculated air and returns heat to the drying process.

    EvidenceLG defines the closed-loop principle and manufacturers identify heat-pump systems on exact models.

    ScopeSealed-system architecture of the exact model.

    Verified2026-08-09

    Sourceslg-heat-pump-explainer, lg-dlhc5502, bosch-wqb245, haier-hd90

  3. 03

    Condensate and control

    Water container or drain, pump where fitted, moisture and temperature sensors, controller and user interface

    Routes condensed water and stops or adjusts the cycle according to the selected program.

    EvidenceOfficial documentation identifies model-specific containers, drainage and sensor programs.

    ScopeExact installation, firmware and accessory arrangement.

    Verified2026-08-09

    Sourcesbosch-wqb245, miele-txr860, samsung-dv90, beko-b5t4923

Equipment taxonomy

Main heat pump dryer formats

These formats describe operator relationship and task scale. None is a universal winner.

Bosch 800 Series heat-pump dryer shown from the front
Official field reference

Official Bosch product image showing the compact front-load format and lower air-system grille; external similarity does not establish internal system or part fit.

Buyer focusUse the format as a starting point, then compare the operating envelope, utilities, duty cycle, operator workflow, accessory system and the exact configured machine.

Official image source

Compact heat-pump dryer

Task scale
Small-space household drying
Operator
User cleans declared filters and empties or connects condensate drainage
Space
Compact cabinet, door swing, service clearance and model-approved stacking
Limit
Compact width does not establish load, cycle time or stack compatibility.

EvidenceBosch and Miele publish compact ventless heat-pump formats.

ScopeNamed US products.

Verified2026-08-09

Sourcesbosch-wqb245, miele-txr860

Full-size heat-pump dryer

Task scale
Routine family laundry and larger source-declared loads
Operator
User selects dryness and fabric program and performs lint/heat-exchanger care
Space
Cabinet depth, door clearance, electrical supply, condensate route and room temperature
Limit
Nominal kg and cu ft values use regional conventions and cannot be directly converted.

EvidenceLG, Samsung, Beko and Haier publish full-size heat-pump configurations.

ScopeExact regional products.

Verified2026-08-09

Sourceslg-dlhc5502, samsung-dv90, beko-b5t4923, haier-hd90

Specification dictionary

What the performance metrics do—and do not—mean

Heat Pump Dryer performance metric dictionary
MetricPurchasing meaningReporting boundaryComparison caution
Rated drying capacitySource-declared dry textile load under a named market methodkg and cu ft labels use different conventionsDo not convert drum volume into textile mass or assume equal usable load.
Energy use and efficiencyElectrical demand for a defined test load and programLoad, initial moisture, program, label jurisdiction and ambient conditions differA promotional percentage or label class is not comparable without its reference dryer and method.
Cycle time and final moistureTime and dryness achieved for a declared load and settingSensor target, load composition, initial moisture, room temperature and maintenance state affect resultsLower operating temperature does not by itself prove faster or more complete drying.
Rated drying capacity evidence

EvidenceOfficial regional pages publish capacity in their market units.

ScopeExact model and declared rating basis.

Verified2026-08-09

Sourceslg-dlhc5502, miele-txr860, samsung-dv90, haier-hd90

Energy use and efficiency evidence

EvidenceIEC 61121 defines performance methods; LG qualifies its comparison with an 8.45 lb DOE load at 57.5% initial moisture content.

ScopeNamed method and exact claim conditions.

Verified2026-08-09

Sourcesiec-61121, lg-dlhc5502, beko-b5t4923

Cycle time and final moisture evidence

EvidenceOfficial sources describe sensor programs and model-specific low-temperature or rapid options.

ScopeApproved textiles and selected program.

Verified2026-08-09

Sourcesmiele-txr860, samsung-dv90, beko-b5t4923, haier-hd90

Evidence + WCB interpretation

Application-fit matrix

Official application evidence does not establish automatic suitability. Each row shows what still needs to be tested.

Bosch heat-pump dryer with textiles visible inside its drum
Official field reference

Official Bosch image showing textiles in the drum; load, dryness, temperature and cycle duration remain program-specific.

Buyer focusTreat the photographed setting as context only. Validate utilities, surface compatibility, operating space, operator controls, environmental conditions and the planned work process on site.

Official image source

Routine ventless household drying

EvidenceIEC and official model sources define differing performance boundaries.

ScopeExact model, load and program.

Verified2026-08-09

Sourcesiec-61121, lg-dlhc5502, bosch-wqb245, miele-txr860

WCB assessment

Run matched loads and record time, final moisture, energy, lint care and room conditions.

Basis
Heat-pump control, initial moisture, load and maintenance interact.
Limitations
Capacity and efficiency labels do not predict every site result.
Buyer action
Witness representative cotton and mixed loads under documented programs.

Stacked or confined installation

EvidenceBosch, LG and Miele publish model-specific dimensions and accessories.

ScopeActual site and exact pair.

Verified2026-08-09

Sourceslg-dlhc5502, bosch-wqb245, miele-txr860

WCB assessment

Verify supply, door, drainage, ambient range, service access and exact stacking kit.

Basis
Ventless operation still rejects some heat to the room and requires serviceable air and condensate paths.
Limitations
Shared width or brand does not prove pairing or stacking approval.
Buyer action
Attach the installation drawing and exact washer, dryer and kit codes to the order.

System component map

Component families and compatibility boundaries

Component families are labels only. No component link or cross-model compatibility is claimed.

WCB heat-pump dryer component verification map
WCB technical diagram

WCB diagram connecting drum, airflow, lint, refrigerant, condensate, sensing and control checks; it does not establish part compatibility.

Buyer focusBefore substitution or service work, match the current manual, model and serial range, part number, physical interface, approved material or chemistry, and electrical configuration.

Evidence sourcesiec-61121, lg-dlhc5502, bosch-wqb245, miele-txr860, samsung-dv90, beko-b5t4923, haier-hd90

Drum, drive and airflow system

Tumbles textiles and moves recirculated air through the load.

Common variants
  • Direct or belt drive
  • Reversible or one-direction drum control
  • Model-specific fan, duct and lint-filter arrangement
Critical checks
  • Motor and controller code
  • Lint-filter identity and interval
  • Drum, bearing and belt service boundary

EvidenceOfficial model documentation shows different drive, drum and filter configurations.

ScopeExact serial family; no cross-model fit.

Verified2026-08-09

Sourceslg-dlhc5502, bosch-wqb245, miele-txr860, samsung-dv90

Heat-pump sealed system

Condenses moisture and recovers heat into the process air.

Common variants
  • Single or manufacturer-described inverter compressor systems
  • Model-specific refrigerant charge
  • Manual or automatic heat-exchanger cleaning
Critical checks
  • Refrigerant and charge label
  • Compressor and heat-exchanger codes
  • Qualified sealed-system service route

EvidenceLG identifies a Dual Inverter HeatPump and auto-cleaning condenser; other models publish their own heat-pump architecture and care.

ScopeExact model and refrigerant label.

Verified2026-08-09

Sourceslg-dlhc5502, bosch-wqb245, haier-hd90

Condensate, sensing and control

Collects or drains water and controls the dryness endpoint.

Common variants
  • Manual container emptying
  • Direct drain hose
  • Moisture and temperature sensor programs
Critical checks
  • Tank, pump and hose codes
  • Drain routing and height
  • Sensor, controller and firmware identity

EvidenceOfficial product and support records define model-specific water and sensing arrangements.

ScopeExact model and installation.

Verified2026-08-09

Sourcesbosch-wqb245, miele-txr860, samsung-dv90, beko-b5t4923

Verified relationships

Related brands and representative models

Representative, not exhaustive. A link means the official source connects the named brand and model; it does not establish a factory, OEM or component-supplier relationship.

6 verified models
Representative heat pump dryer models
BrandModelSubtypeOfficial specification referenceMarket scopeVerifiedSource
LG Home AppliancesDLHC5502VFull-size ventless heat-pump dryer
  • 7.8 cu ft source-stated capacity
  • Dual Inverter HeatPump
  • Auto Cleaning Condenser
LG US2026-08-09lg-dlhc5502
Bosch Home AppliancesWQB245AXUCCompact heat-pump dryer
  • 24-inch class format
  • Ventless heat-pump configuration
  • Self-Cleaning Condenser
Bosch US2026-08-09bosch-wqb245
MieleTXR860WP Eco & SteamCompact T1 heat-pump dryer
  • 18 lb / 8 kg source-stated load
  • 120 V 15 A source-stated supply
  • PerfectDry moisture sensing
Miele US2026-08-09miele-txr860
Samsung Home AppliancesDV90T6240LN/S19 kg heat-pump tumble dryer
  • 9 kg source-stated capacity
  • Heat-pump configuration
  • Sensor-controlled drying programs
Samsung UK2026-08-09samsung-dv90
BekoB5T4923RW9 kg heat-pump tumble dryer
  • 9 kg source-stated capacity
  • Heat-pump configuration
  • RapiDry programs
Beko UK2026-08-09beko-b5t4923
Haier Home AppliancesHD90-D357U19 kg heat-pump inverter tumble dryer
  • 9 kg source-stated capacity
  • Heat Pump Inverter
  • 220-240 V UK configuration
Haier UK2026-08-09haier-hd90

WCB decision support

Procurement decision matrix

No composite score or brand ranking. Each row identifies a comparison trap and the next verification action.

WCB assessment

Dry representative household loads efficiently

Verify
Final moisture, time, energy and fabric result
Comparison trap
Ranking by energy class, kg or promotional saving alone
Assessment
Run matched loads under declared conditions.
Basis
Initial moisture, program, ambient conditions and maintenance affect performance.
Limitations
No single catalogue figure predicts every load.
Buyer action
Compare witnessed like-for-like loads and record the full test boundary.

EvidenceIEC and official manufacturer claims expose different methods and qualifications.

ScopeExact model, market and program.

Verified2026-08-09

Sourcesiec-61121, lg-dlhc5502, bosch-wqb245, beko-b5t4923

WCB assessment

Control installation and service cost

Verify
Supply, drainage, stacking, filters, heat exchanger and sealed-system support
Comparison trap
Assuming ventless or shared cabinet width establishes fit
Assessment
Price the exact installed system and five-year maintenance parts.
Basis
Accessories, refrigerant circuits and service boundaries differ.
Limitations
Future parts and refrigerant support are not guaranteed.
Buyer action
Obtain written stacking-kit, filter, pump, sensor and sealed-system service details.

EvidenceManufacturers publish model-specific accessories and support.

ScopeMarket and serial family.

Verified2026-08-09

Sourceslg-dlhc5502, bosch-wqb245, miele-txr860, haier-hd90

Engineering validation

Checks before parts, configuration or service decisions

This checklist narrows verification work; it is not a compatibility guarantee or repair manual.

01

Ambient, electrical and condensate installation

Heat-pump capacity and cycle control depend on approved room conditions, supply and water disposal.

Required actionRecord room temperature range, outlet, clearance and drain route against the exact manual.

EvidenceOfficial model records publish different supply and condensate arrangements.

ScopeExact regional model and site.

Verified2026-08-09

Sourcesbosch-wqb245, miele-txr860, haier-hd90

02

Lint, heat-exchanger and refrigerant service

Restricted airflow or incorrect sealed-system work can affect performance and safety.

Required actionFollow exact cleaning intervals and use qualified refrigerant service where required.

EvidenceLG and Bosch describe model-specific condenser systems; manuals govern service.

ScopeExact model and service jurisdiction.

Verified2026-08-09

Sourceslg-dlhc5502, bosch-wqb245, beko-b5t4923

Standards boundary

Safety and performance references

IEC 61121:2012

JurisdictionInternational

Version2012

ApplicabilityMethods for measuring performance of household electric tumble dryers.

EvidenceIEC publishes the standard scope and edition.

ScopeConfirm regional adoption and the exact declared method.

Verified2026-08-09

Sourcesiec-61121

IEC 60335-2-11:2024

JurisdictionInternational

Version2024

ApplicabilityParticular safety requirements for household tumble dryers, including appliances using a refrigerating system.

EvidenceIEC publishes the current tumble-dryer safety standard scope.

ScopeConfirm regional conformity and amendments for the exact product.

Verified2026-08-09

Sourcesiec-60335-2-11

Technical developments

Selected changes in heat pump dryer systems

  1. Full-size US heat-pump dryers expanded ventless capacity

    LG's DLHC5502 platform combined a 7.8 cu ft source-stated cabinet with ventless heat-pump drying, direct drive and an auto-cleaning condenser.

    EvidenceLG's official product and support pages identify the model and its system features.

    ScopeLG US DLHC5502 family at introduction period.

    Verified2026-08-09

    Sourceslg-dlhc5502, lg-dlhc5502-support

Evidence record

Sources

First published 2026-08-09 · Last verified 2026-08-09 · Last material modification 2026-08-09

  1. standard

    IEC 61121:2012 Tumble dryers for household use - Methods for measuring the performance

    International Electrotechnical Commission

    Open official source

    Accessed 2026-08-09

  2. standard

    IEC 60335-2-11:2024 Household and similar electrical appliances - Safety - Tumble dryers

    International Electrotechnical Commission

    Open official source

    Accessed 2026-08-09

  3. manufacturer

    What Is a Heat Pump? Heat Pump Laundry

    LG Electronics USA

    Open official source

    Accessed 2026-08-09

  4. manufacturer

    DLHC5502V 7.8 cu. ft. Heat Pump Dryer

    LG Electronics USA

    Open official source

    Accessed 2026-08-09

  5. manufacturer

    DLHC5502W Product Support and Manuals

    LG Electronics USA

    Open official source

    Accessed 2026-08-09

  6. manufacturer

    WQB245AXUC 800 Series Heat Pump Dryer

    Bosch Home Appliances USA

    Open official source

    Accessed 2026-08-09

  7. manufacturer

    TXR860WP Eco & Steam T1 Heat-Pump Dryer

    Miele USA

    Open official source

    Accessed 2026-08-09

  8. manufacturer

    Heat Pump vs Condenser Dryer Buying Guide and DV90T6240LN/S1

    Samsung UK

    Open official source

    Accessed 2026-08-09

  9. manufacturer

    B5T4923RW 9kg Heat Pump Tumble Dryer

    Beko UK

    Open official source

    Accessed 2026-08-09

  10. manufacturer

    HD90-D357U1 X5 Heat Pump Tumble Dryer

    Haier UK

    Open official source

    Accessed 2026-08-09