Prototype studies · 2026

Where does five kilowatts live?

Three form factors for the same residential inference appliance — shaped by the room, the heat path and the person who has to service it.

Concept   Appearance and installation studies only. Electrical, thermal, acoustic, fire, utility and production validation remain open.

Three HEARTH concept appliances in a neutral studio: a wide wall unit, a tall floor tower and a horizontal ducted mechanical-room unit.
One product languageThree installation contexts
Design premise

Desirable first. Inspectable immediately after.

A household should see an appliance it can live with. An installer should see the rails, disconnect, airflow, access and isolation before reading a caption.

These are not three skins over one box. The wall unit protects floor area. The tower buys acoustic surface and a natural vertical air path. The ducted unit gives heat somewhere deliberate to go. None has earned the right to become hardware yet.

  1. 01Heat is architecture. Intake, exhaust and summer rejection shape the enclosure.
  2. 02Serviceability stays visible. A field-replaceable compute module needs a human-sized door, fasteners and working clearance.
  3. 03Warmth is rare. One amber point reports human-facing state; nothing glows for decoration.
  4. 04No fictional specifications. Dimensions, acoustics and thermal capacity remain validation targets.
Wall study

The floor stays clear.

A shallow rail-mounted enclosure for garages where every square foot already has a job.

Placement
Garage wall
Service
Front + side
Heat path
Room air
Hard question
Summer rejection
W1 concept mounted on a garage wall above clear floor space, connected through surface-mounted metal conduit near a workbench and bicycle.
Domestic studyDedicated conduit · clear floor · visible service zone
W1 wall prototype in a neutral studio, with a shallow off-white and petrol enclosure, side intake mesh, service handle, disconnect and mounting rail.
  1. 01Side intake
    Filter access without removing the compute door.
  2. 02Service door
    Full-width replaceable module access.
  3. 03Isolation
    Local disconnect and metering remain visible.
  4. 04Structural rail
    Load transfers to framing, not finish material.
Engineering viewAppearance model · dimensions pending
What W1 must prove

W1 only works if a shallow acoustic path can reject sustained heat without turning a garage wall into a loudspeaker.

  • Structure-borne vibration at the mounting rail
  • Service access with a parked vehicle nearby
  • Filter loading in a dusty garage
  • A credible exterior-rejection kit for warm weather
Tower study

Let the heat rise.

A narrow floor unit that spends height on slower air, larger acoustic surfaces and straightforward replacement access.

Placement
Basement / garage
Service
Front + side
Heat path
Bottom to top
Hard question
Acoustics
T1 tower prototype anchored on a small concrete pad in a modest basement utility room beside, but separated from, a water heater and electrical panel.
Domestic studyHousekeeping pad · utility clearances · vertical exhaust
Tall T1 tower prototype in a neutral studio, with a low intake, large upper exhaust mesh, front service panels and vibration-isolated feet.
  1. 01Acoustic exhaust
    Large area targets lower air velocity.
  2. 02Lift point
    Recessed grip for controlled field handling.
  3. 03Low intake
    Filter and plenum remain serviceable.
  4. 04Isolated plinth
    Anchoring without hard-coupling the cabinet.
Engineering viewAppearance model · dimensions pending
What T1 must prove

T1 trades wall loading for a small footprint and a longer acoustic path. The tower has to earn that floor space with meaningfully quieter operation.

  • Tip and seismic stability
  • Fan tone and low-frequency vibration through the floor
  • Safe hot-air stratification near joists
  • Top-plenum options for summer exhaust
Duct study

Give the heat a destination.

A mechanical-room unit that treats recovered heat and summer rejection as primary interfaces, not accessories.

Placement
Mechanical room
Service
Full front door
Heat path
Ducted / bypass
Hard question
HVAC integration
D1 ducted prototype on an isolation pad in a residential mechanical room, connected to four supported insulated ducts beside a separate home air handler.
Domestic studyWinter recovery · summer bypass · open service aisle
Horizontal D1 ducted prototype in a neutral studio, with four round duct collars, a large petrol service door, disconnect, metering and vibration-isolated feet.
  1. 01Dual air paths
    Recovery and bypass remain separate.
  2. 02Service door
    Compute and filter modules leave forward.
  3. 03Local isolation
    Meter and disconnect live outside the door.
  4. 04Vibration feet
    Cabinet and duct supports remain decoupled.
Engineering viewAppearance model · dimensions pending
What D1 must prove

D1 offers the clearest thermal architecture and the hardest installation. It succeeds only if integration is repeatable across homes that were never designed for it.

  • Condensation, filtration and pressure balance
  • Fail-safe bypass when the home system is off
  • Fire and smoke-control boundaries
  • HVAC commissioning time and cost
Trade space

No universal enclosure.

Each study protects a different household constraint. The field pilot should discover which constraint is actually scarce.

StudyProtectsHeat integrationInstallationPrimary unknown
W1 / WallFloor areaLow without an add-onStructural rail + dedicated circuitNoise and summer heat
T1 / TowerAcoustic areaMedium with a top plenumPad + anchoring + dedicated circuitFootprint value and stability
D1 / DuctThermal controlHighest potentialElectrical + HVAC commissioningRepeatability across homes
What comes next

Appearance is the first prototype, not the last.

The right enclosure will be chosen by measured heat, sound, service time and utility constraints — not by the render people like most.

These studies make the questions physical enough to test. They do not answer them.

  1. 01Instrument an off-the-shelf compute rig for heat, power and production throughput.
  2. 02Build acoustic and airflow bucks before designing cosmetic shells.
  3. 03Review service clearances with electricians, HVAC crews and utility engineers.
  4. 04Take one installation path through permitting, insurance and inspection.
  5. 05Only then freeze dimensions and industrial design.