HUUM DROP Electric Sauna Heater 4.5/6/7.5/9kW
The HUUM DROP is a wall-mounted electric sauna heater inspired by the purest element in nature: a drop of water. Its rounded design softens the angular interior of a classic sauna, and its 122 lb stone capacity gives a soft, consistent heat and long-lasting steam. It is offered in four sizes: DROP 4 (4.5 kW, order no. H1001052), DROP 6 (6 kW, order no. H1001062), DROP 7 (7.5 kW, order no. H1001082) and DROP 9 (9 kW, order no. H1001072).
The heater does not run on its own: it requires a HUUM UKU control and sauna stones, both sold separately. See What to Order With It below.
Package Contents
- HUUM DROP sauna heater
- Wall-mount bracket
- Heat reflector (DROP 9 only)
- Installation and operation manual
Key Features
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Model / Order #: DROP 4 / H1001052, DROP 6 / H1001062, DROP 7 / H1001082, DROP 9 / H1001072
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Water-Drop Design: Unique rounded shape that complements the sauna interior.
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Four Sizes: 4.5, 6, 7.5 and 9 kW for sauna rooms from 106 to 530 cu. ft.
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240V / 1-Phase: Hardwired 240V single-phase operation. Can also run on 208V single-phase at reduced output.
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122 lb Stone Capacity: Requires 4 boxes of stones, sold separately.
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Direct Stone Contact: Direct contact between the stones and heating elements; more exposed stones create a longer and milder heat.
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Stainless Steel: Stainless steel construction with stainless steel, industrial-quality heating elements.
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Wall-Mounted: Wall-mount bracket included.
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Control: Works with HUUM UKU controls, sold separately.
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Origin: Designed, engineered and crafted in Estonia.
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Listing: SGS listed.
What to Order With It
The heater ships without a control or stones. Both are required for operation.
Required (choose one UKU control):
Required (sauna stones, order 4 boxes):
Optional:
Specifications
| Model |
DROP 4 |
DROP 6 |
DROP 7 |
DROP 9 |
| Order number |
H1001052 |
H1001062 |
H1001082 |
H1001072 |
| UPC |
4745090270044 |
4745090270068 |
4745090270099 |
4745090270075 |
| Output at 240V |
4.5 kW |
6 kW |
7.5 kW |
9 kW |
| Sauna room size at 240V |
106-247 cu. ft. |
177-353 cu. ft. |
230-441 cu. ft. |
282-530 cu. ft. |
| Current at 240V |
18.8 A |
25 A |
31.25 A |
37.5 A |
| Circuit breaker at 240V |
30 A |
30 A |
40 A |
50 A |
| Wire size at 240V |
10 AWG |
10 AWG |
8 AWG |
8 AWG |
| Output at 208V |
3.4 kW |
4.5 kW |
5.6 kW |
6.75 kW |
| Sauna room size at 208V |
88-194 cu. ft. |
141-282 cu. ft. |
176-318 cu. ft. |
211-388 cu. ft. |
| Current at 208V |
16.35 A |
21.63 A |
26.92 A |
32.45 A |
| Circuit breaker at 208V |
20 A |
30 A |
30 A |
40 A |
| Wire size at 208V |
12 AWG |
10 AWG |
10 AWG |
8 AWG |
| Heater weight (empty) |
20.9 lbs. |
21.9 lbs. |
25 lbs. |
24.9 lbs. |
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Heater Type: Electric sauna heater, wall-mounted inside the sauna room
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Electrical Service: 240V, 1-phase, hardwired (208V, 1-phase at the reduced outputs shown above). Must be connected by a licensed electrician.
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Control: HUUM UKU control required, sold separately
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Stone Capacity: 122 lbs.
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Stone Size: 2-4 in (5-10 cm)
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Maximum Temperature Setting: 230 F (110 C)
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Construction: Stainless steel, brushed stainless steel finish
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High Temperature Limit: At the sensor
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Listing: SGS listed, IPX4
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Location: Indoor sauna room use
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Delivery: Ships by parcel carrier.
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Warranty: 3-year limited residential, 1-year limited commercial, excluding heating elements
Dimensions & Weight
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Heater Dimensions (W x D x H): 15.4" x 13.2" x 23.3" (390 x 335 x 590 mm), all sizes
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Heater Weight (empty): DROP 4: 20.9 lbs. DROP 6: 21.9 lbs. DROP 7: 25 lbs. DROP 9: 24.9 lbs.
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Weight on the Wall, Filled With Stones: Up to 143.3 lbs. (65 kg)
Installation Requirements
Minimum safety clearances (letters refer to the diagram below):
| Model |
DROP 4 |
DROP 6 |
DROP 7 |
DROP 9 |
| A: heater to surfaces at the sides and front |
4 in (100 mm) |
4.8 in (120 mm) |
5.3 in (135 mm) |
5.9 in (150 mm) |
| B: clear width |
23.3 in (590 mm) |
24.8 in (630 mm) |
25.9 in (660 mm) |
27.2 in (690 mm) |
| C: clear depth from the mounting wall |
17.1 in (435 mm) |
17.9 in (455 mm) |
18.5 in (470 mm) |
19.1 in (485 mm) |
| D: side wall to the wall bracket |
6.7 in (170 mm) |
7.5 in (190 mm) |
8.1 in (205 mm) |
8.7 in (220 mm) |
| E: floor to the bottom of the wall bracket |
12.2 in (310 mm) |
12.2 in (310 mm) |
12.2 in (310 mm) |
12.2 in (310 mm) |
| Top of heater to ceiling |
47.3 in (1200 mm) |
47.3 in (1200 mm) |
47.3 in (1200 mm) |
47.3 in (1200 mm) |
| Bottom of heater to floor |
4 in (100 mm) |
4 in (100 mm) |
4 in (100 mm) |
4 in (100 mm) |
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Sauna room height: Minimum 75 in (1900 mm).
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Surface temperature: The highest allowed temperature for wall and ceiling surfaces is 284 F (140 C). Installing the heater closer to flammable construction than the clearances above may cause a fire hazard.
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Wall strength: The wall and mounting must hold the full weight of the heater with stones, 143.3 lbs. (65 kg). Plan blocking behind the paneling before the wall is closed up.
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Power connection: The power cable enters 2.6 in (6.5 cm) to the left of the heater's center and 3 in (8 cm) from its lower edge, viewed from the front. The junction box must be waterproof and located no more than 19.7 in (50 cm) from the floor.
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Wiring: Use heat-resistant power cable that meets UL 62; cable with PVC insulation is not allowed. A circuit breaker that disconnects all poles must be installed on the power circuit ahead of the sauna control. Breaker and wire sizes above are from the installation manual; your electrician sizes the circuit to local code.
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Stones: Stack 2-4 in (5-10 cm) stones so the heating elements are fully covered and not visible. A stone container filled too sparsely is a fire hazard.
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Ventilation: Bring fresh air in above the heater stones or from under the heater, with an adjustable inlet valve. Place the exhaust valve in the opposite wall, at least 7.9 in (20 cm) above the inlet.
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One heater per room: Do not install more than one heater in the sauna room.
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Installation: Electrical work must be carried out by a licensed electrician, following the installation manual and local codes.
Videos
Play video: HUUM DROP sauna heater installation video
Play video: HUUM sauna heater stone placement video
Documents
Installation & Operation Manual (DROP 4.5 / 6 / 7.5 / 9 kW)
Warranty
3-Year Limited Residential Warranty, 1-Year Limited Commercial Warranty: HUUM covers the DROP with a 3-year limited warranty in residential use and a 1-year limited warranty in commercial use. Heating elements are not covered; they are treated as consumable parts. The warranty applies only when the heater is installed and used according to the manual, and it is void if the heater and sauna room are sized incorrectly.
