Heater Accessories

Steam in the room and hot rinse water from the same heater. The stainless TITAN SL1 Water Tank uses heat from the burner, releases steady steam through openings in its top, and serves heated water through an integrated spigot. It is useful at a cabin or campsite where hot water would otherwise need another setup. The tank fits TITAN SL1 only. Heater, propane cylinder, and stones are sold separately.

The nicest sauna interiors hide their plumbing. This is the piece that lets an automatic water dosing system feed the stones without a length of tube running down your wall. A black steel pipe just under 24 inches long, fitted with a low-profile nozzle, mounted above the heater and fed through the wall panel from behind. The Autodose unit itself is a separate purchase. This is the part people forget to order, then wish they had, once the panels are up and the wall is closed.

An aluminum-zinc-coated steel plate with adjustable feet that goes under a wood-burning sauna stove. Harvia’s instruction sheet is direct about when it is not optional: “the protective bedding must be used when the stove is installed on e.g. tile floor with a water barrier treatment.” Harvia lists it for its wood-burning stove range with two exceptions, the 20 ES Pro/S and the Linear 22 ES. It measures 22 x 25 in and 2–3 in high, weighs 26.5 lb, and the feet let you level a stove on a floor that slopes to a drain.

Check the date on your heater before you buy this one. Every HIVE built since April 2024 already has an Air Tunnel inside it. If yours is older, this is the stainless steel insert that sits down among the stones and gives the heat a channel to climb through: HUUM rates it at a 25 percent shorter heat-up, longer element life, and fewer stones needed to fill the basket. It fits every HIVE and HIVE Mini electric model. A small part that changes how long you wait to get in.

Stainless steel reflector panel that hooks onto the side of a HUUM STEEL heater. HUUM says it makes it possible to achieve half smaller safety distances from the walls. Sold as a single panel; reflectors can be connected to each other.

A Cilindro is a cylinder of hot steel standing at shin height in a small dark room, and the first time somebody stands up too fast next to one they find that out. The HPC3 is Harvia’s own guard for the 6 and 8 kW Cilindro: four heat-treated birch arches held off the heater on stainless steel mounts, 20.1 inches square. It keeps skin off the shell without hiding the heater, and the birch reads as part of the room rather than as safety equipment bolted on.

The flange is what turns a heater sitting on a bench into a heater built into one. Stainless steel, 19.7 inches across, made for the 6 and 8 kW Cilindro. It shields the surrounding timber from radiant heat, which is what lets the cut-out sit close to the heater body instead of standing off at a safe but ugly distance. The finished detail is a clean surface with a cylinder rising through it.

Read this before you order an AutoLeil: the pipe is not in the box. The Saunum automatic water dispensing system needs this pre-bent primary pipe to run, and it is a separate line on the order. Coming pre-bent is the point. It arrives in the shape it needs to be in, which takes the fabrication step out of the install and lets it fit a range of room layouts without anyone cutting and forming steel on site.

Drip tray for HUUM DROP series heaters. Sits under the heater to catch water running off the stones so it does not pool on the sauna floor.

Floor plate for HUUM HIVE Flow stoves standing on wood or other combustible flooring, 16.5 x 17.7 in with a 0.8 in upturned edge. The manual states it suits all HIVE Flow heaters.