What is HUUM DROP?
HUUM DROP is a wall-mounted heater from HUUM with 4.5-9 kW output and 122 lbs stone capacity.
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HUUM DROP
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HUUM DROP sauna heater specs and 3D room planner
Use this manual-checked HUUM DROP product page to compare US and EU power options, adjusted room volume, clearances, UKU controls, rocks, and the shared HUUM 3D body before choosing the correct regional electrical package.
HUUM DROP is a wall-mounted heater from HUUM for 106-460 cu ft adjusted sauna rooms. Key planning facts: 4.5-9 kW output, 122 lbs stone capacity, and 75" minimum finished ceiling guidance, controller guidance: HUUM UKU certified controls, and separate US 240/208V 2~; EU 400V 3/N~ regional electrical rows that share the 3D body only for layout planning.
Design with HUUM DROP Buy in North America at Sauna Marketplace
Quick answers
What sauna room size fits HUUM DROP?
The published adjusted room-volume range is 106-460 cu ft. Add glass, tile, stone, brick, concrete, or log exposure before choosing the final kW row.
What clearances does HUUM DROP need?
Plan 3.94"-5.91" side/back clearance, 3.94"-5.91" front clearance, and a 75" minimum finished ceiling check before placing benches or glass.
Which controller works with HUUM DROP?
Current controller guidance: HUUM UKU certified controls. Match the controller, relay or power unit, and voltage to the selected kW row before ordering.
Are US and EU HUUM DROP heaters the same for 3D planning?
HUUM DROP uses the same 3D heater body/envelope in SaunaDesignPro for US and EU planning, but the electrical SKUs are separate. DROP 4, 6, and 7 keep the same nominal kW across the US and EU tables, while DROP 9 is 9 kW in the US table and 8.5 kW in the EU table. Match the final phase, voltage, breaker, cable, controller, listing, and warranty to the regional manual before ordering.
Where should I start with HUUM DROP?
Use the 3D designer to validate the room, benches, openings, clearances, and material schedule, then use Sauna Marketplace for the current package and buying path.
HUUM DROP size and clearance table
| Variant | Power | Room volume | Dimensions | Rocks | Side/back | Front | Minimum ceiling | Controller |
|---|---|---|---|---|---|---|---|---|
| DROP 4DROP 4 | 4.5 kW | 106-248 cu ft | 15.4" W x 13.2" D x 23.2" H | 122 lb | 3.94" | 3.94" | 75" | HUUM UKU certified controls |
| DROP 6DROP 6 | 6 kW | 177-318 cu ft | 15.4" W x 13.2" D x 23.2" H | 122 lb | 4.72" | 4.72" | 75" | HUUM UKU certified controls |
| DROP 7DROP 7 | 7.5 kW | 248-389 cu ft | 15.4" W x 13.2" D x 23.2" H | 122 lb | 5.51" | 5.51" | 75" | HUUM UKU certified controls |
| DROP 9DROP 9 | 9 kW | 283-460 cu ft | 15.4" W x 13.2" D x 23.2" H | 122 lb | 5.91" | 5.91" | 75" | HUUM UKU certified controls |
Best fit
- 4.5-9 kW HUUM heater family for 106-460 cu ft adjusted hot rooms.
- Wall-mounted layouts where the heater footprint, front clearance, and bench approach are planned before ordering.
- 122 lbs stone capacity with HUUM UKU certified controls controller guidance.
- Rooms that can meet the 75" minimum finished ceiling check for the selected size row.
- Wall blocking, cladding buildup, and heater bottom height should be resolved before paneling goes in.
Designer checks
- Size the room by adjusted volume, including the 3.3 cu ft per sq ft (1 m3 per 1 m2) for uninsulated brick, tile, glass, or similar surfaces rule where it applies.
- Validate side/back clearance 3.94"-5.91", front clearance 3.94"-5.91", and bench setback before finalizing benches.
- Check the 75" minimum finished ceiling against the room height.
- Carry the selected HUUM UKU certified controls package into the material schedule and heater placement notes.
Package notes
- DROP wall-mounted heater body
- 122 lb; Recommended Rocks for HUUM DROP
- Installation and operation manual
- Recommended Rocks for HUUM DROP
- DROP Embedding Flange
Manual-backed facts
Source
HUUM DROP 2.0 US installation and operation manual
source: HUUM DROP 2.0 Installation and Operation Manual (H1001L08 v8 US manual; PDF saved from HUUM public design resources; checked May 23, 2026)
Mounting
Wall-mounted
Floor clearance shows the minimum bottom height where the manual lists one.
Model numbers
DROP 4 / DROP 6 / DROP 7 / DROP 9
Useful when the store name and manual model number are not identical.
Room volume range
106-460 cu ft
Use adjusted sauna volume after cold surfaces, not just geometric room volume.
Cold-surface adder
3.3 cu ft per sq ft (1 m3 per 1 m2) for uninsulated brick, tile, glass, or similar surfaces
The calculator applies the brand-family coefficient before selecting a heater size.
Minimum finished ceiling
75"
Computed from body height, floor clearance, top clearance, and the manual minimum room height.
Maximum room height
Not listed for these sizes
Verify with the selected manual when designing unusually tall rooms.
Electrical/control
US: 4.5 kW at 240V 2~; 208V 2~ derates to 3.4 kW, EU: 4.5 kW at 400V 3/N~ (3 x 10A); HUUM UKU certified controls / US: 6 kW at 240V 2~; 208V 2~ derates to 4.5 kW, EU: 6 kW at 400V 3/N~ (3 x 10A); HUUM UKU certified controls / +2 more
Use the selected kW row and SKU when matching breakers, phases, relays, and controller packages.
Critical differences
Certified control system required Add glass/tile/brick penalty before sizing
4 more notes shown below.
Regional electrical SKUs
US 240/208V 2~; EU 400V 3/N~
DROP 4, 6, and 7 keep the same nominal kW across the US and EU tables, while DROP 9 is 9 kW in the US table and 8.5 kW in the EU table.
3D model basis
Shared HUUM body/envelope for US and EU planning
HUUM DROP US and EU rows use the same SaunaDesignPro 3D body/envelope for placement. Do not treat that as the same electrical SKU; use the selected regional manual for output, phase, breaker, cable, controller, listing, and warranty.
- Certified control system required
- Add glass/tile/brick penalty before sizing
- US and EU HUUM electrical packages use separate regional specs/listings; share the 3D body model only after confirming the exact market SKU
- Heat diverter is mandatory
- HUUM publishes UKU Classic and UKU Glass/Mirror/Gold controller 3D resources; SaunaDesignPro places the selected UKU controller outside the hot room in 3D planning.
- DROP requires the heat diverter and a wall structure capable of supporting the heater with stones.