Electric vs Wood-Fired Sauna — Which One Is Right for You?

Choosing between an electric and a wood-fired sauna is one of the first decisions you'll face when buying an outdoor sauna in New Zealand. Both deliver a genuine Finnish sauna experience — the kind my wife Anu grew up with in Finland — but they get there in quite different ways. Here's an honest comparison from someone who sells both and uses an electric sauna at home four to five times a week.

The Experience

Let's start with what actually matters — what it feels like to sit inside.

A wood-fired sauna has a character all its own. There's a ritual to building the fire, tending it, watching the flames through the glass door of the heater, and smelling the wood smoke. The heat has a softer, more radiant quality, and many people find the whole process deeply satisfying. It slows you down before you even sit on the bench.

An electric sauna, on the other hand, is about simplicity. You turn the dial, walk away, and come back in 30 to 40 minutes to a sauna that's ready to go. The Harvia heaters we use — like the Cilindro 7kW in our Anu Electric Sauna — deliver consistent, even heat every single session. There's no fire to manage, no smoke, and no learning curve. You throw water on the stones, the steam rises, and you're in a proper löyly just as you would be in Finland.

Both are authentic. Both produce real steam. The difference is in the journey to get there.

Ease of Use

This is where I'm going to be upfront about my personal bias — I'm an electric sauna person, and it comes down to convenience. After a long day, the last thing I want to do is spend 45 minutes managing a fire before I can relax. With our electric sauna, I turn it on, do something else for half an hour, and then I'm in. No kindling, no chimney to worry about, no ash to clean out the next day.

Wood-fired saunas require a bit of practice. Managing the temperature takes time to learn, and it's common to overheat the sauna in the first few sessions. You need to start with smaller pieces of wood to get the temperature up, then switch to larger logs to maintain steady heat. The ideal range is 70 to 90 degrees, and getting a feel for that takes a handful of sessions.

For families or anyone who wants to sauna regularly without much fuss, electric is hard to beat. For people who enjoy the hands-on ritual and don't mind the extra time, wood-fired is genuinely rewarding.

Installation

Electric saunas need a certified electrician to wire in the heater. Our Anu Electric Sauna, for example, requires a 6mm twin and earth cable and a 32-amp fuse, with a master power switch installed on the outside of the sauna. It's a straightforward job for any qualified sparky, and once it's done, you're set.

Wood-fired saunas don't need an electrician, which is a genuine advantage if you're putting the sauna somewhere without easy access to power — a rural property, a bach, or down by the lake. The trade-off is the chimney. You need to make sure the flue is properly installed and that the sauna is positioned with adequate clearance from fences, trees, and structures. There are no ongoing electrical costs, though you do need a steady supply of dry firewood.

Running Costs

Wood-fired saunas cost nothing to run if you have your own firewood supply. For people on lifestyle blocks or rural properties, this can be a real drawcard. If you're buying firewood, expect to go through a bag or two per session depending on how long you sauna and how cold it is outside.

Electric saunas draw power from the mains. A typical session on our Harvia heaters costs roughly the same as running a few loads in the dryer — it's not a significant household expense. The convenience trade-off is well worth it for most people.

Maintenance

Both types of sauna need the same basic timber care — exterior oiling, interior paraffin oil on benches, and the Bake and Breathe method after every session to prevent mould. That part is identical regardless of heater type.

Where they differ is in the heater itself. Electric heaters are essentially maintenance-free beyond an annual stone check and replacement. You remove the stones once a year, inspect the heating elements, reload with fresh Harvia stones, and you're done.

Wood-fired heaters need the firebox and chimney cleaned regularly. Ash builds up, creosote can accumulate in the flue, and the heater walls should be inspected for cracks or warping. It's not complicated, but it is an ongoing task that electric owners simply don't have.

Which One Do Commercial Buyers Choose?

If you're buying a sauna for a lodge, retreat, Airbnb, or gym, I'd strongly recommend electric. The reason is simple — you need reliability and ease of use for guests or staff who may not know how to manage a wood fire safely. An electric heater turns on with a dial, heats to a consistent temperature, and shuts off on a timer. There's no fire risk from unattended flames, no chimney maintenance, and no ash cleanup between guests.

We've supplied saunas to accommodation providers and wellness businesses across New Zealand, and electric is overwhelmingly what they choose once they think through the operational side.

So Which Should You Choose?

If you want the simplest, most consistent sauna experience with minimal maintenance, go electric. If you love the ritual of fire, you have access to firewood, or you're putting the sauna somewhere off-grid, wood-fired is a fantastic option.

There's no wrong answer here — both deliver the real Finnish sauna experience that Anu and I are passionate about. Every sauna we sell is built with thermally modified Nordic pine and paired with quality Harvia components, so the bones of the sauna are the same either way. The heater is a lifestyle choice.

If you're still not sure, give us a call on 021 244 8261 or come and see our saunas in person at our place in Rotorua. We're always happy to talk it through and help you figure out which option fits your home and your routine.

Trevor & Anu Weir — Pure Sweat Sauna NZ Ltd