Best heaters for a small indoor sauna

Start with your room volume rather than price alone. The 2.9kW Harvia Delta Combi Electric Corner Steam Sauna Heater Black has a listed range of 1.5–4m³. The Harvia Vega Compact Series 3.5kW covers 2–4.9m³ and has built-in controls, with prices from £955.56.

For a room of 3–6m³, the 4.5kW options include the Harvia The Wall SW45E, KOVE, SAWO30 Wall NB, KOVE x Harvia The Wall SW45, Harvia The Wall SW45 Black Steel and Pillar IKI. Compare their controls and prices to narrow your shortlist.

The 4.5kW HUUM Drop has a wider listed range of 3–7m³. The 6.6kW Tylo Sense Sport 6 covers 4–8m³, with a built-in mechanical panel and prices from £1,164.

If you want built-in controls, the SAWO30 Wall NB starts at £406.86. The KOVE x Harvia The Wall SW45 has built-in manual controls from £549, while the Black Steel SW45 has built-in illuminated switches from £669.63. The KOVE 4.5kW lists mechanical controls and starts at £179.

The Harvia The Wall SW45E starts at £455, but its separate control unit is sold separately. The Pillar IKI starts at £1,229 and lists an optional IKI UKU Wi-Fi Controller or no control unit. Check the control option when comparing these prices.

Two shops were checked for the SW45E and one for each other heater. Treat these figures as listed starting prices rather than a wider market comparison.