Harvia Qube 9kW Black Sauna Heater

Harvia Qube QU90E (9.0 kW) — Technical Specifications

The Harvia Qube QU90E 9.0kW: Technical Buying Guide

From Order Confirmation to First Heat: The Professional Blueprint

The Harvia Qube QU90E is a floor-standing architectural heater designed for premium sauna environments between 9 $m^3$ and 14 $m^3$. As an "E" model, it prioritises a minimalist interior by moving all control logic to an external digital interface. This guide outlines the technical journey from the moment of order to your first session.

1. Logistics & Site Arrival

• The Parcel: Unlike a barrel sauna, the Qube is a compact but dense delivery. It arrives in high-protection corrugated packaging.
• The 24-Hour Audit: Upon delivery, you must unbox and inspect the brushed black steel outer casing. Any transit dents or scratches must be reported within 24 hours to validate a replacement claim.
• Component Check: Ensure the 25kg of Finnish sauna stones are present. These stones are specifically selected for their high thermal mass and resistance to cracking.

2. Infrastructure: The Electrical Mandate

The Qube QU90E is a high-performance mechanical unit. The "First Heat" depends entirely on your property's electrical readiness.

• The Load: ~39.1 Amps (Single Phase).
• The Professional Rule: You must appoint a qualified, registered electrician to assess your property. All electrical data provided is a guideline; requirements vary by property. Your electrician will determine the specific RCBO protection and SWA cable sizing required to reach the sauna location.
• Control Hub Wiring: Because this is an "E" model, your electrician must also pull the data cables from the heater location to the external mounting point for your Xenio/Fenix Control Hub.

3. Interior Integration (Safety Distances)

The Qube’s triple-wall engineering allows for a remarkably compact safety footprint, allowing you to maximise bench space.

• The 50mm Rule: A minimum of 50mm clearance is required on all four sides from combustible materials (wood benches, walls).
• Vertical Clearance: A minimum of 1.15 m of open space is required between the top of the heater and the ceiling.
• Floor Standing: This unit must sit on a level, non-combustible floor. It cannot be wall-mounted.

4. Mechanical Installation & Stone Loading

• The "Wash" Step: Before the first heat, you must wash the 25kg of sauna stones to remove any stone dust.
• The Loading Pattern: Stones should be placed loosely within the heating chamber to allow for air convection. Do not pack the stones tightly; air must flow through the heating elements to prevent the unit from overheating and "tripping" the safety sensor.
• Silicone Requirement: All internal wiring from the wall outlet to the heater must use SiHF-JB High-Temperature Silicone Cable (180°C). Standard PVC wiring will fail and poses a fire risk.

5. The First Heat (Commissioning)

• The Burn-Off: During the very first session, the heating elements may produce a slight odour as manufacturing residues burn off. This is normal. Ensure the sauna door is left open for 30 minutes during this initial "dry run."
• Löyly Protocol: Once at temperature, only use water on the stones. Never use pool water or chemically treated water, as this will corrode the 9kW elements and void the warranty.

6. Warranty & Compliance

To protect your investment and ensure structural safety:

1. Professional Sign-Off: You must retain your Electrical Installation Certificate (EIC).
2. Qualified Installation: Any claim for hardware failure will require proof that the unit was commissioned by a registered electrician.
3. Owner Stewardship: Regular inspection of the stones (re-stacking once a year) is required to ensure optimal airflow and element longevity.

MANUALS

2D CAD

3D CAD

Technical Specification: Electrical Supply

Infrastructure Standards for Harvia Qube QU90E (9.0kW)

CRITICAL ADVISORY: The provision of a safe, compliant, and sufficient electrical supply is the sole responsibility of the property owner. This document serves as a technical guideline. You must appoint a qualified, registered electrician to assess, plan, and execute all works. You must always defer to your electrician’s professional judgment regarding local wiring regulations, safety standards, and the specific load capacity of your property.

1. Power Profile & Circuit Analysis

The Qube QU90E is a high-amperage mechanical component. To achieve the rapid thermal ramp-up required for a 14 $m^3$ environment, the electrical infrastructure must be robust.

• Load Calculation: ~39.1 Amps (at 230V, Single Phase).
• Supply Options: Adaptable to 230V 1N~ (Single Phase) or 400V 3N~ (3-Phase).
• Protection: Requires a dedicated 40-Amp Type B RCBO.
• Technical Note: Your electrician may specify a Type B breaker to manage the initial resistance of the stainless steel elements, preventing nuisance tripping while maintaining sensitive ground-fault protection.
• Domestic Load Audit: Your electrician must verify that your property's Main Service Fuse (typically 60A, 80A, or 100A) has sufficient "headroom" to support a ~40A draw in addition to existing high-load appliances.

2. Cable Topology & Infrastructure

• The Supply Run: We recommend SWA (Steel Wire Armoured) cable from the consumer unit to the sauna location.

• Voltage Drop: Distance is a critical factor. If the sauna is located at the end of a garden, your electrician must calculate the appropriate cable cross-section (e.g., 6 mm² or 10 mm²) to ensure the heater receives the full voltage required to operate at 9.0kW.
• Local Isolation: A weatherproof rotary isolator switch must be installed within reach of the sauna (in accordance with local zoning rules) for emergency disconnection and safe maintenance.

3. The Silicone Mandate (Internal High-Heat Zone)

Standard domestic wiring is not engineered for the thermal environment of a sauna.

• The Requirement: All wiring from the junction box/isolator to the heater terminals MUST be SiHF-JB High-Temperature Silicone Cable (rated to 180°C).
• The Risk: PVC, LSZH, or "Arctic" cables will harden, crack, and eventually short-circuit when exposed to 90°C+ ambient temperatures. Use of non-silicone cabling within the sauna envelope voids all hardware warranties and poses a significant fire risk.

4. Control Hub & Sensor Logic

As an "E" Model, the Qube requires an external control unit (e.g., Xenio/Fenix).

• Data Cabling: Your electrician will need to route the data cable from the external control panel to the Power Controller (Contactor Box).
• Sensor Placement: The OBT (Over-Temperature) sensor must be mounted on the wall directly above the heater, 150mm below the ceiling. Incorrect placement will lead to premature safety shut-offs or dangerous overheating.

5. Commissioning & Warranty Validation

To protect your investment and validate the Harvia hardware warranty:

1. Certification: The installation must be signed off by a qualified, registered professional.
2. Documentation: You must retain the Electrical Installation Certificate (EIC). This document is required for any future warranty claims regarding the heating elements or internal circuitry.
3. Final Connection: While the unit is floor-standing, the "Live" connection and safety testing (Trip Times/Earthing) must be performed by the electrician.

Delivery and Installation Manual: Harvia Qube QU90E 9.0kW

Mechanical Mounting, Stone Loading, and Electrical Commissioning

The Qube QU90E is a precision-engineered floor-standing heater. Its "Triple-Shell" technology allows for exceptionally low surface temperatures, but its internal thermal core requires strict adherence to airflow and electrical protocols to ensure performance and safety.

Phase 1: Receipt & Site Preparation

• The Component Audit: Upon arrival, verify the following:
• The Qube QU90E Heater Unit (Brushed black steel).
• 25kg of Finnish Sauna Stones (Do not use generic stones).
• The Temperature Sensor (Usually supplied with your chosen Control Hub).
• The Footing: The Qube is a floor-standing heater. The floor must be level and non-combustible (e.g., ceramic tiles, stone, or a concrete pad).
• Warning: Never place the heater directly onto wood or vinyl flooring.
• Levelling: The Qube features adjustable feet. Use a 13mm spanner to ensure the unit is perfectly vertical to allow for even heat convection.

Phase 2: The Customer's Role (Stone Preparation)

The way you load your stones determines the lifespan of your heating elements.

• The Wash: You must wash the stones before loading. This removes stone dust, which can otherwise bake onto the elements and cause a "metallic" smell.
• The Stacking Protocol: * Place stones loosely between the heating elements.
• Airflow is Key: Do not "wedge" stones or pack them tightly. Air must flow from the bottom of the heater, through the elements, and out the top.
• Element Coverage: Ensure the heating elements are fully covered but do not build a high "tower" of stones above the rim.
• Maintenance: Over time, stones will crack from thermal stress. You should re-stack and inspect your stones every 6–12 months.

Phase 3: The Electrician's Role (Infrastructure & Hookup)

The following must be executed by a qualified, registered electrician.

• Power Entry: The cable entry is located at the base of the heater.
• The Silicone Mandate: All wiring from the junction box to the heater terminals must be SiHF-JB High-Temperature Silicone Cable (rated to 150°C - 180°C). Standard PVC cable is a fire risk in this environment.
• Control Hub Integration: As an "E" model, the Qube must be wired to your external control unit (Xenio/Fenix).
• Sensor Placement: The temperature sensor must be mounted on the wall directly above the centre of the heater, exactly 150mm below the ceiling.
• Electrical Load: Confirm the supply can handle ~39.1A (Single Phase) or 3 x 16A (3-Phase).

Phase 4: Commissioning & "The First Heat"

Once the electrician has completed the live connection and tested the RCBO, follow the commissioning sequence:

1. The Burn-Off: Turn the heater on to maximum for 30 minutes.
2. Ventilation: During this first run, do not stay in the sauna. Leave the door open to allow manufacturing residues and stone dust to vent.
3. The First Steam: After 30 minutes, the "First Heat" is complete. Your sauna is now ready for use.

Harvia Heater Warranty & Infrastructure Covenant

Mechanical Validation and Professional Installation Standards

This document defines the mandatory requirements for the activation of the manufacturer’s warranty for Harvia Electric Heaters. By taking delivery of this unit, the owner acknowledges that the warranty is a conditional agreement—valid only when the infrastructure meets the precise engineering standards required for high-amperage thermal equipment.

1. The "Professional Mandate" (Owner’s Primary Responsibility)

The single most important condition of this warranty is the validation of the electrical supply.

• Qualified Installation: This heater is a high-load mechanical device. It must be installed, commissioned, and signed off by a qualified, registered electrician.
• The EIC Validation: To initiate any warranty claim, the owner must provide a copy of the Electrical Installation Certificate (EIC) specifically for the sauna circuit. DIY installation or installation by an uncertified individual voids all warranties immediately.
• Property Suitability: It is the owner’s sole responsibility to ensure their electrician has verified that the property’s Main Service Fuse and consumer unit can safely handle the specific Ampere draw of the unit (e.g., 39.1A for 9kW models).

2. Technical Infrastructure Requirements

Hardware longevity is dictated by the quality of the environment in which it operates.

• The Silicone Mandate: All internal wiring within the "high-heat zone" (the sauna interior) must be SiHF-JB High-Temperature Silicone Cable (rated to 180°C).
• Liability Note: Standard PVC, "Arctic," or LSZH cables will degrade and fail. Any damage to the heater’s internal circuitry or terminals caused by the use of non-silicone wiring is excluded from coverage.
• Circuit Protection: The heater must be protected by an appropriately rated Type B RCBO. Nuisance tripping caused by an incorrectly specified breaker or an undersized supply cable (Voltage Drop) is an infrastructure fault, not a heater defect.

3. Mechanical Stewardship (Stone & Airflow Logic)

The heating elements rely on a "convection chimney" effect to stay within safe operating temperatures.

• The Airflow Rule: Stones must be washed and stacked loosely. If the stones are packed too tightly, the elements cannot "breathe," leading to localised overheating and element burnout.
• Element Warranty: Elements that show signs of buckling or melting due to restricted airflow (poor stacking) are not covered by the warranty.
• Water Purity: Only fresh domestic water may be used on the stones. Use of chlorinated pool water, spa water, or salt water causes rapid "pitting" and corrosion of the stainless steel. This is classified as user-inflicted damage and is not covered.

4. Coverage Terms & Consumables

• Private Use: 24 Months (2 Years) hardware coverage.
• Commercial/Public Use: 6 Months hardware coverage (due to extreme duty cycles).
• Excluded Items: Sauna Stones are a consumable item. They naturally crack and degrade over time. The warranty does not cover the replacement of stones or any damage caused by "stone dust" resulting from a failure to wash them before the first heat.

5. The "Arrival" Protocol

• The 24-Hour Inspection: The owner must inspect the heater casing and internal elements for transit damage within 24 hours of delivery.
• Reported Defects: Once the unit is mounted or wired, claims for "cosmetic dents" or "surface scratches" will no longer be accepted.

Harvia Sauna Heaters — Returns & Refunds Policy

At Balance Recovery we want you to be completely happy with your purchase. If you change your mind, the following returns policy applies to our range of Harvia sauna heaters. It is offered in addition to, and does not affect, your statutory rights under the Consumer Rights Act 2015 and the Consumer Contracts Regulations 2013.

1. Your 14-Day Return Window

You may request a return within 14 days of receiving your Harvia sauna heater. To start a return, contact us at contact@balancerecovery.co.uk with your order number and details before sending anything back.

2. Condition & Packaging

To be eligible for a return, the heater must be unused and unopened, in its original, undamaged packaging, complete with all components, fittings, control units, stones and documentation included. Heaters that have been installed, wired in, used, or removed from their original packaging cannot be returned under this change-of-mind policy (your statutory rights for faulty goods are unaffected — see section 6).

3. Return Shipping

You are responsible for the cost of returning the goods. We recommend using a tracked, insured service suitable for a heavy item, as the heater remains your responsibility until it reaches our warehouse. Please retain your proof of postage.

4. Inspection on Return

Once your return arrives at our warehouse it will be inspected to confirm its condition and that it is complete. We aim to complete this inspection promptly and will keep you informed throughout.

5. Your Refund

• If, on inspection, the heater is returned complete and undamaged in its original condition, we will issue a full refund.
• If any part of the heater is found to be missing or damaged on inspection, the cost of the missing or damaged part(s) will be deducted from your refund, and the remaining balance refunded to you.
• Refunds are issued to the original payment method once the inspection is complete.

6. Faulty, Damaged or Incorrect Goods

This change-of-mind policy is separate from your rights if goods arrive faulty, damaged in transit, or not as described. Any missing, damaged or incorrect parts should be reported promptly on delivery (please refer to the product's manufacturer's warranty for the reporting timeframe). Where goods are faulty or damaged in transit, you will not be charged for return shipping, and we will arrange repair, replacement or refund in accordance with your statutory rights.

7. How to Request a Return

Email contact@balancerecovery.co.uk with your order number, the item(s) you wish to return, and the reason. We will confirm the return address and next steps before you send anything back.

8. Your Statutory Rights

Nothing in this policy affects your statutory rights. Under the Consumer Rights Act 2015, goods must be of satisfactory quality, fit for purpose and as described; under the Consumer Contracts Regulations 2013 you have cancellation rights for most items bought at a distance. This policy is provided in addition to those rights.

Resources

MANUALS

2D CAD

3D CAD