Rated for a bigger room: HUUM CLIFF 6
HUUM rates it for 5–9 m³ (about 177–318 ft³, our conversion); Finnleo rates the Designer-SL2 6.0 kW for 175–310 ft³ (about 5–8.8 m³, our conversion).
Finnleo Designer-SL2 6.0 kW
A 6 kW electric sauna heater from Finnleo, rated by the maker for 175–310 ft³ (about 5–8.8 m³, our conversion). Every figure below is Finnleo's own, linked to where it is published.
See it at FinnleoSpecifications published by Finnleo (9)
- Heater output
- 6 kW72-0130%20Designer%20SL2%20Heater%2009-23-2020.pdf
- Room size it is rated for
- 175–310 ft³ (about 5–8.8 m³, our conversion)72-0130%20Designer%20SL2%20Heater%2009-23-2020.pdf
- Fuel
- ElectricDesigner-SL2
- Stone capacity
- 50 lbDesigner-SL2
- Controls
- Pairs with the SaunaLogic2(R) ControlDesigner-SL2
- Mounting
- WallDesigner-SL2
- Dimensions
- 16-1/2" W x 11" D x 23" HDesigner-SL2
- Safety listing
- ETL72-0130%20Designer%20SL2%20Heater%2009-23-2020.pdf
- Warranty
- 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-onlyLimited Warranty (All-in-One Warranty 73-0124)
As published by Finnleo, read on 2026-09-23. Makers revise their products; check Finnleo's current specification before you buy. Figures marked "about" are Saunakivi's unit conversions of the maker's figure.
Before you buy
- Room size. Our heater sizing guide explains how makers adjust the rated room size for glass and uninsulated walls.
If you are looking for more
A longer stated warranty, on at least part of the product: Scandia Ultra 6.0 kW
Scandia states: 10 years (shell); 1 year (parts). Finnleo states for the Designer-SL2 6.0 kW: 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-only.
Compare it with
Designer-SL2 6.0 kW vs CLIFF 6
Side by side with the HUUM CLIFF 6. The makers of both electric heaters publish rated room sizes that overlap.
Designer-SL2 6.0 kW vs CORE 6
Side by side with the HUUM CORE 6. Both electric heaters are rated by their makers for at least some of the same room sizes.
Designer-SL2 6.0 kW vs DROP 6
Side by side with the HUUM DROP 6. Both electric heaters are rated by their makers for at least some of the same room sizes.
Other electric heaters
Harvia KIP80B 8 kW 240VAC
Harvia · electric · 8 kW · rated for 251–424 ft³ (about 7.1–12 m³, our conversion)
Harvia KIP45B 4.5 kW 240VAC
Harvia · electric · 4.5 kW · rated for 100–211 ft³ (about 2.8–6 m³, our conversion)
Harvia KIP60W 6.0 kW 240V
Harvia · electric · 6 kW · rated for 170–300 ft³ (about 4.8–8.5 m³, our conversion)
Harvia Cilindro Half PC90H 9 kW 208V
Harvia · electric · 9 kW
HUUM DROP 6
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
HUUM DROP 9
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
Designer-SL2 6.0 kW: questions answered from Finnleo's specification
What is the output of the Designer-SL2 6.0 kW?
Finnleo lists 6 kW. Related question: What size sauna heater do I need?
What size of sauna room is the Designer-SL2 6.0 kW for?
Finnleo rates it for 175–310 ft³ (about 5–8.8 m³, our conversion). See our heater sizing guide for how makers adjust that figure for glass and uninsulated walls.
How many stones does the Designer-SL2 6.0 kW hold?
Finnleo lists a stone capacity of 50 lb.
Source: Designer-SL2
How is the Designer-SL2 6.0 kW controlled?
Finnleo lists: Pairs with the SaunaLogic2(R) Control.
Source: Designer-SL2
What warranty does Finnleo give on the Designer-SL2 6.0 kW?
Finnleo lists: 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-only.
Is the Designer-SL2 6.0 kW safety listed?
Finnleo states: ETL.
More from Finnleo: all Finnleo products on Saunakivi.
Sources
- Designer-SL2 — Finnleo
- 72-0130%20Designer%20SL2%20Heater%2009-23-2020.pdf — Finnleo
- Limited Warranty (All-in-One Warranty 73-0124) — Finnleo