Ad Harvia vs HUUM vs Narvi: which sauna heater brand? (UK prices 2026)
The three sauna heater brands UK retailers sell most often, compared on price, controls, stone capacity, wood-burning options and warranty, using retailer listings checked on 11 November 2026.
Quick answer
For a 6kW heater with controls, Harvia and Narvi are cheapest: £409.99–£489 for the Narvi NM, Harvia Vega and Harvia Wall at the UK retailers we checked, all with dials on the heater. HUUM heaters hold far more stone (55kg in the DROP, about 150kg in the STEEL, against 20–30kg) but need a separate UKU controller, so a 6kW HUUM DROP with the basic controller comes to about £882. All three make wood burners: Narvi Kuru from £629, Harvia M3 £755 and HUUM HIVE Wood from £1,010, flue extra. Pick Harvia for choice and availability, Narvi for value with more stone, and HUUM for big stone mass, design and app control.
Harvia, HUUM and Narvi are the heater brands we saw most often at UK sauna retailers. We compared their mainstream electric and wood-burning heaters on price, controls and stone capacity. We haven’t tested any of them. Everything below comes from retailer listings checked on 11 November 2026.
The brands in brief
| Harvia | HUUM | Narvi | |
|---|---|---|---|
| Home country | Finland | Estonia | Finland |
| 6kW electric, cheapest we found | £410 (Vega BC60, PoolMarket) | £488 (DROP, Finnmark), plus a controller | £409.99 (NM, Finnmark) |
| Controls | Dials on most mainstream heaters; Xenio digital and MyHarvia Wi-Fi versions cost more | Separate UKU controller: Local £394, Wi-Fi Classic £579 | Dials on the NM, which can go on either side |
| Stones in a 6kW model | 20kg (Wall) | 55kg (DROP), about 150kg (STEEL) | 30kg (NM) |
| Wood burner from | £755 (M3) | £1,010 (HIVE Wood 13) | £629 (Kuru 14) |
Steam & Oak describes Harvia as the world’s largest sauna manufacturer. Harvia heaters come fitted in many of the saunas we’ve listed, including the Polar Recovery Sauna Cube and the SaunaPlunge Pennine and Brontë.
A 6kW heater, all in
What you’d pay for a 6kW heater ready to run, before stones and the electrician:
| Heater | Heater | Controller | Total |
|---|---|---|---|
| Narvi NM 6kW (black) | £409.99 | Built in | £409.99 |
| Harvia Vega BC60 | £410 | Built in | £410 |
| Harvia Wall 6kW | £489 | Built in | £489 |
| HUUM DROP 6kW | £488 | UKU Local Black £394 | £882 |
| HUUM STEEL 6kW | £659.99 | UKU Local Black £394 | £1,053.99 |
Then add stones: a 20kg box was £40–£60 at the retailers we checked, That’s one box (£40–£60) for a Harvia Wall, three (£120–£180) for a HUUM DROP and about eight (£320–£480) for a HUUM STEEL.
| Model | From | Size / suits | Spec | Power |
|---|---|---|---|---|
| Harvia Vega BC60 6kW PoolMarket | £410 | Saunas up to 8m³ (BC80: up to 12m³); 540 × 480 × 310mm | Electric, 6kW; built-in thermostat and timer | Single or three phase; hard-wired by an electrician |
| Narvi NM Finnmark Sauna | £409.99 | 4.5kW 3–6m³ · 6kW 5–8m³ | Electric, 4.5kW or 6kW; dial controls on the heater; up to 30kg stones | Single or three phase |
| Harvia Wall black steel heater Steam & Oak | £449 | 4.5kW 3–6m³ · 6kW 5–8m³ · 8kW 7–12m³ | Electric, 4.5–8kW; integrated controls; 20kg stones | 230V/400V, connected by a qualified electrician |
| HUUM DROP Finnmark Sauna | £429.99 | 3–13m³ across the range | Electric, 4.5–8.5kW; up to 55kg stones | Single or three phase; needs a HUUM UKU controller (UKU Local Black £394 at Finnmark) |
| HUUM STEEL Finnmark Sauna | £659.99 | 5–16m³ across the range | Electric, floor-standing; about 150kg stones | 230V single or 400V three phase; needs a HUUM UKU controller |
| Narvi Kuru wood-burning Finnmark Sauna | £629 | Kuru 14: 8–14m³ · Kuru 20: 10–20m³ | Wood-burning; glazed door | None (needs a flue) |
| Harvia M3 wood-burning Aqualine Saunas | £755 | 6–13m³; 710 × 390 × 450mm; 45kg plus 30kg stones | Wood-burning, 16.5kW; controls on heater | None (needs a chimney) |
| HUUM HIVE Wood Finnmark Sauna | £1,010 | 13kW 6–13m³ · 17kW 8–16m³ | Wood-burning; up to 90kg stones (13kW) or 130kg (17kW) | None (115mm flue) |
Harvia
Harvia's cheapest 6kW
Harvia Vega BC60 6kW
From £410 at PoolMarket
£410 for the 6kW BC60; £451.20 for the 8kW BC80. Price checked 11 November 2026.
- Heat
- Electric, 6kW; built-in thermostat and timer
- Power
- Single or three phase; hard-wired by an electrician
- Size
- Saunas up to 8m³ (BC80: up to 12m³); 540 × 480 × 310mm
The mainstream wall heater with built-in thermostat and timer dials, at £410 (6kW) or £451.20 (8kW) at PoolMarket, which showed a stock notification button when we checked.
- PoolMarket showed a "notify me when in stock" button when we checked.
- Stones sold separately.
See current price at PoolMarket Ad
Specs are as published by the retailer. We have not tested this product.
Harvia in black
Harvia Wall black steel heater
From £449 at Steam & Oak
£449 (4.5kW), £489 (6kW), £529 (8kW). Price checked 11 November 2026.
- Heat
- Electric, 4.5–8kW; integrated controls; 20kg stones
- Power
- 230V/400V, connected by a qualified electrician
- Size
- 4.5kW 3–6m³ · 6kW 5–8m³ · 8kW 7–12m³
- Warranty
- 2 years
£449–£529 at Steam & Oak for 4.5–8kW, with integrated controls, 20kg of stones and a two-year warranty.
See current price at Steam & Oak Ad
Specs are as published by the retailer. We have not tested this product.
Harvia's classic wood stove
Harvia M3 wood-burning
From £755 at Aqualine Saunas
£755 (Harvia steel chimney set £965 extra at the same retailer). Price checked 11 November 2026.
- Heat
- Wood-burning, 16.5kW; controls on heater
- Power
- None (needs a chimney)
- Size
- 6–13m³; 710 × 390 × 450mm; 45kg plus 30kg stones
- Warranty
- 2 years
£755 at Aqualine Saunas for 6–13m³ rooms. Harvia’s steel chimney set was £965 more at the same retailer.
- Stones not included (two boxes of 10–15cm stones).
See current price at Aqualine Saunas Ad
Specs are as published by the retailer. We have not tested this product.
Narvi
Best value 6kW
Narvi NM
From £409.99 at Finnmark Sauna
£409.99 (6kW black) to £456.99; 4.5kW from £449.99. Price checked 11 November 2026.
- Heat
- Electric, 4.5kW or 6kW; dial controls on the heater; up to 30kg stones
- Power
- Single or three phase
- Size
- 4.5kW 3–6m³ · 6kW 5–8m³
£409.99 for the 6kW in black at Finnmark Sauna. It’s made in Finland, holds up to 30kg of stones, and its dials can be fitted on either side. Finnmark lists a two-year warranty for private use, with 12 months on the elements.
- A 9kW version is three-phase only.
- Stones sold separately.
See current price at Finnmark Sauna Ad
Specs are as published by the retailer. We have not tested this product.
Cheapest wood burner here
Narvi Kuru wood-burning
From £629 at Finnmark Sauna
£629 (Kuru 14), £661 (Kuru 20); flue extra. Price checked 11 November 2026.
- Heat
- Wood-burning; glazed door
- Power
- None (needs a flue)
- Size
- Kuru 14: 8–14m³ · Kuru 20: 10–20m³
£629 for the Kuru 14 (8–14m³) or £661 for the Kuru 20 (10–20m³) at Finnmark Sauna. A flue kit and 35–40kg of stones are extra.
- Flue kit and 35–40kg of stones bought separately.
See current price at Finnmark Sauna Ad
Specs are as published by the retailer. We have not tested this product.
HUUM
HUUM's entry point
HUUM DROP
From £429.99 at Finnmark Sauna
£429.99 (4.5kW), £488 (6kW), £569 (9kW, rated 8.5kW); controller extra. Price checked 11 November 2026.
- Heat
- Electric, 4.5–8.5kW; up to 55kg stones
- Power
- Single or three phase; needs a HUUM UKU controller (UKU Local Black £394 at Finnmark)
- Size
- 3–13m³ across the range
£429.99–£569 at Finnmark Sauna, holding up to 55kg of stones. It needs a UKU controller (from £394). Steam & Oak sells it for £899–£1,199, so check what’s included in each price.
- Steam & Oak sells the same heater at £899–£1,199.
- Stones sold separately.
See current price at Finnmark Sauna Ad
Specs are as published by the retailer. We have not tested this product.
Most stone for a 6kW
HUUM STEEL
From £659.99 at Finnmark Sauna
£659.99 (6kW), £838 (9kW), £890 (10.5kW); controller extra. Price checked 11 November 2026.
- Heat
- Electric, floor-standing; about 150kg stones
- Power
- 230V single or 400V three phase; needs a HUUM UKU controller
- Size
- 5–16m³ across the range
£659.99–£890 at Finnmark Sauna for 6–10.5kW. The slim floor-standing column holds about 150kg of stones, and the retailer says the 6kW needs only 50mm side clearance. It needs a UKU controller.
- Retailer says side clearance on the 6kW is just 50mm.
See current price at Finnmark Sauna Ad
Specs are as published by the retailer. We have not tested this product.
HUUM's wood burner
HUUM HIVE Wood
From £1,010 at Finnmark Sauna
£1,010 (13kW), £1,368 (17kW). Price checked 11 November 2026.
- Heat
- Wood-burning; up to 90kg stones (13kW) or 130kg (17kW)
- Power
- None (115mm flue)
- Size
- 13kW 6–13m³ · 17kW 8–16m³
£1,010 (13kW) or £1,368 (17kW) at Finnmark Sauna, holding up to 90kg or 130kg of stones. The flue and stones are extra.
- Stones, flue kit and chimney parts sold separately.
See current price at Finnmark Sauna Ad
Specs are as published by the retailer. We have not tested this product.
Which brand should you choose?
- Harvia if you want the widest choice, built-in dials, and a heater that many sauna makers already fit.
- Narvi for the lowest price we found on a 6kW, with a bit more stone than Harvia’s wall heaters.
- HUUM if you want a big stone mass, a distinctive design and app control through the UKU Wi-Fi, and you’re happy to pay for the separate controller.
Whatever you choose, size it to your room first. See best sauna heaters for the sizing rule, and budget for an electrician: see sauna electrical requirements.
Frequently asked questions
Is HUUM better than Harvia?
Not better, different. HUUM heaters hold much more stone (55kg in the DROP against 20kg in the Harvia Wall) and are controlled from a separate UKU console. Harvia's mainstream heaters are cheaper and have dials on the heater itself. A 6kW Harvia Wall was £489 at Steam & Oak; a 6kW HUUM DROP plus UKU Local controller was about £882 at Finnmark Sauna.
Where are Harvia, HUUM and Narvi heaters made?
Harvia and Narvi are Finnish brands; Finnmark Sauna describes the Narvi NM as made in Finland. HUUM is Estonian, and retailer listings describe its heaters as designed and built in Estonia.
Do HUUM heaters need a controller?
Yes, the DROP and STEEL do. The UKU Local Black was £394 and the UKU Wi-Fi Classic Black £579 at Finnmark Sauna on 11 November 2026.
Which brand has the cheapest sauna heater?
In our check, the Narvi NM 6kW in black (£409.99 at Finnmark Sauna) and the Harvia Vega BC60 (£410 at PoolMarket) were the cheapest 6kW heaters. PoolMarket showed the Vega as needing a stock notification when we checked.
Sources
We read each of these on or before 11 November 2026. Retailer links in this list are plain links, not affiliate links.
- PoolMarket: Harvia Vega sauna heater
- Steam & Oak: Harvia Wall black steel sauna heater
- Steam & Oak: Harvia Cilindro PC90
- Finnmark Sauna: Narvi NM
- Finnmark Sauna: Narvi Kuru
- Finnmark Sauna: HUUM DROP
- Finnmark Sauna: HUUM STEEL
- Finnmark Sauna: UKU Local Black controller
- Finnmark Sauna: HUUM HIVE Wood
- Aqualine Saunas: Harvia M3