Installing a pellet stove will cost you around 2,000 to 6,000 euros in practice for the appliance and flue together. Budget 1,500 to 4,000 euros for the stove and 500 to 1,500 euros for the flue, depending on the route. Fitting the stove yourself is allowed, there is no legal requirement to use a professional installer. But the flue gas discharge and the connection are precise work, and mistakes there are life threatening. What you need: a gas tight flue (usually 80 mm) that ideally runs out above the roof, a good air supply, a power socket nearby and dry, damp free storage for your pellets.
Below I explain plainly how a pellet stove works, why the flue really is different from a wood burner, what you can and cannot do yourself, and what to watch out for when it comes to safety. So you know exactly what you are getting into.
How does a pellet stove actually work?
A pellet stove burns pressed wood pellets. An auger, which is a kind of screw, automatically moves pellets from the hopper into the burn pot. There they are ignited electrically. A fan blows the heat into the room, and a second fan pushes the flue gases outside.
That automation and those fans are the biggest difference from a wood burner straight away: a pellet stove always needs electricity. The auger, the ignition and the fans all run on power. If the electricity fails, your stove shuts down. No more heat, and the stove goes out in a controlled way. If you use the pellet stove as your main heating, keep that in mind.
The power consumption itself is modest, by the way. While burning, a pellet stove draws roughly 60 to 150 watts, with a short peak of around 300 to 350 watts at start up. Over a heating season that comes to roughly 90 to 225 kWh. On your energy bill that is a few pounds.
Pellet stove or wood burner: what is the difference?
Both burn wood, but in practice they are different beasts. A short, honest comparison:
| Feature | Pellet stove | Wood burner |
|---|---|---|
| Efficiency | 85 to 95% | 75 to 85% |
| Fuel | Pressed pellets (moisture < 10%) | Logs (need to dry 1.5 to 2 years) |
| Operation | Automatic, thermostat, programmable | Refuel and adjust by hand |
| Needs power? | Yes, always | No |
| Flue | Usually 80 mm, under positive pressure, gas tight | Usually 150 mm, natural draught |
| Heat output | Constant, controllable | Peak after refuelling, more atmospheric fire |
| Fuel storage | Dry, bags or bulk | Dry log stack, plenty of space |
Pellets have a constant low moisture content (on average around 7%), while even well dried firewood soon holds three times as much moisture. That is exactly why a pellet stove burns more efficiently and more cleanly and is easier to keep at temperature.
Do you go for atmosphere, a crackling fire and independence from the mains? Then a wood burner suits you better. Do you want convenience, a thermostat and higher efficiency? Then a pellet stove makes more sense.
What does installing a pellet stove cost?
The costs vary widely, because they depend heavily on the appliance and on the route the flue has to take. A realistic overview:
| Item | Price indication |
|---|---|
| Pellet stove (appliance) | 1,500 to 4,000 euros |
| Flue via existing chimney | 475 to 600 euros |
| Flue with new roof penetration | 1,000 to 1,500 euros |
| Installer labour | around 75 euros per hour, fitting often 150 to 950 euros |
| Pellets per heating season | see below |
A simple installation where you can use an existing, suitable chimney is considerably cheaper than a completely new flue through the roof. For the full package (stove plus complete installation), budget around 2,000 to 6,000 euros in practice.
Note: prices for appliances and pellets move with the market. Always ask for a current, tailored quote, then you know where you stand.
What do the pellets cost and how much do you use?
This determines your running costs, so let me be concrete:
- A 15 kg bag of pellets costs 6 to 8 euros on average.
- Using the stove as supplementary heating? Reckon on about 1,000 to 1,500 kg per year.
- As main heating that rises to 1 to 1.5 tonnes per year, which is around 65 to 100 bags.
Buy loose by the bag and you pay more per kilo but need no storage silo. Bulk (a tonne or more at once, poured loose or on a pallet) is cheaper per kilo, but you do need dry space for it. I will come back to that shortly.
Can you install a pellet stove yourself?
Yes, there is no legal obligation to have a pellet stove fitted by a certified installer. If you are handy and understand flue gas discharge and the safety rules, you can get a long way. Especially if a suitable flue is already in place.
But be honest with yourself, because there are three good reasons to hand it over (partly) after all:
- Safety. A poorly sealed or wrongly sized flue can lead to smoke leakage, carbon monoxide in the house or a chimney fire. This is not the part to gamble on.
- Warranty. Many manufacturers and insurers tie the warranty to installation by a certified installer. Do it yourself and you may lose that warranty.
- Insurance. In the event of fire or water damage, your insurer may ask whether the installation was carried out properly. If you cannot prove it, a payout could be at risk.
A good middle ground: you fit and connect the stove yourself, but leave the flue and the final check to a professional. Then you have the best of both worlds.
Connecting the flue: this is different from a wood burner
This is the most important and at the same time the most underestimated part. Many people think a pipe is a pipe. It is not.
A pellet flue is under positive pressure. The flue gas fan pushes the flue gases outside. With a wood burner it is the other way round: it works on natural draught and the flue is under negative pressure. The consequence is crucial: with a pellet stove every joint in the flue is put under slight pressure. If there is a leak, flue gases (with carbon monoxide) are pushed into your room. That is why a pellet flue must be gas tight: with the right seals and, where required, heat resistant sealing.
More about the flue:
- Diameter: usually 80 mm for stoves up to about 10 kW. At higher output or a long run, 100 mm is used. That is exactly why a pellet flue can be thinner than the 150 mm flue of a wood burner.
- Concentric flue: a pipe in pipe system that discharges flue gases and at the same time draws fresh combustion air in from outside. Ideal for well insulated, airtight homes.
- Discharge preferably above the roof. The rules aim to ensure that flue gases draw away well and do not come back inside through a window or air inlet. A discharge that rises above the ridge (guideline: around 50 cm above the ridge) gives the best and safest draught.
- A single wall outlet straight through the wall is not permitted. A wall or facade outlet on a pellet stove is at best a grey area, where you have to demonstrate with equivalent measures (such as a concentric, sealed penetration) that it is safe. Many shops sell ready made wall kits, but a roof penetration with natural draught is almost always the better and safer choice. Not sure? Put it to a certified installer.
Can you connect a pellet stove to an existing flue?
Often yes, and that saves a lot on cost. You can make an existing 150 mm wood burner flue suitable with a reducer. Conditions: the flue must be in good condition, clean, swept and able to be made fully gas tight. Have this checked, because an old flue with gaps is exactly the scenario where you want to prevent carbon monoxide.
Air supply, floor and clearances
Besides the flue, there are a few more things that need to be right:
- Air supply. A pellet stove needs combustion air. In modern, well insulated homes, a separate air supply from outside is strongly recommended (or required by the manufacturer). That way the stove does not take oxygen from your room, and you avoid negative pressure and damp problems. Your stove’s manual is the deciding factor here.
- Hearth plate. Is the stove standing on a combustible floor (wood, laminate, vinyl)? Then a heat resistant hearth plate is needed. Rule of thumb: at least 30 cm overhang at the front and 15 cm at the sides. Check the weight too: a heavy stove may call for extra floor support.
- Clearance to combustible material. Keep to the clearances the manufacturer prescribes. For a single wall flue pipe the guideline is at least 50 cm clearance to combustible material. The manual gives the exact clearances for your model, and those are the deciding factor.
Installing a pellet stove step by step
Here is what the process looks like in broad strokes:
- Choose the spot. Think about a power socket nearby, the shortest and straightest route for the flue, and enough clear space all around.
- Sort out the floor. Lay a hearth plate if needed and check that the floor bears the weight.
- Build up the flue. Work from top to bottom or from bottom to top, with the right parts, and seal every joint gas tight. This is the critical part.
- Arrange the air supply. Connect the external air supply or check that there is enough ventilation.
- Position and level the stove and connect the flue pipe.
- Plug it into the socket and set the stove up (room, flue length, pellet type).
- Have the whole thing checked. A tightness check and draught measurement by a professional is worth its weight in gold before you first fire it up properly.
- First firing. The first time, some smoke or smell may come off (the paint curing). Ventilate well.
Maintenance: brief but do not skip it
A pellet stove is clean, but not maintenance free. Plan this in:
- Regularly (every few days with daily use): empty the ash pan into a non combustible container, clean the burn pot and glass. Use a dedicated ash vacuum.
- Every six months: check and clean the flue to prevent blockage and chimney fire.
- Yearly: a service by a specialist. They clean the fans, check the electronics and the seals and calibrate the stove.
Only empty the ash pan once the ash is completely cold, and always into a metal (non combustible) container. Ash can smoulder for a long time.
Storing pellets: dry is everything
Pellets are sensitive to moisture. If they get damp, they crumble into sawdust, clog the auger and burn poorly. So:
- Always store pellets dry and damp free. A garage, shed or utility room is fine, as long as it is not clammy in there. Do not put bags directly on a cold concrete floor, but on a pallet or board.
- Bags (15 kg) are handy for smaller use and easy to stack. For a whole season as main heating, reckon on 65 to 100 bags. That is a sizeable stack, so work out in advance where it should go.
- Bulk or a silo is cheaper per kilo and saves the lugging, but calls for a dry, solid storage spot.
- Buy certified pellets (ENplus A1). Light coloured pellets are usually better; dark pellets often contain more chlorine, which wears parts out faster. The right pellet keeps both your stove and your flue healthy.
Safety: do not skip this
- Fit a carbon monoxide alarm and a smoke alarm in the room with the stove. You cannot smell or see carbon monoxide, an alarm is your only warning.
- Make sure the stove has CE marking.
- Smoke coming into the room at start up? Switch the stove off with the button (leave the power on, so the ventilation keeps running) and ventilate well. Then investigate the cause, or call your installer.
- Flame or fire in the hopper? Switch off, put it out with sand (never water) and call your installer.
Frequently asked questions
Can I fit and connect a pellet stove myself?
Yes, that is allowed without a required certified installer. But be honest about your own knowledge: the flue must be gas tight and correct. To keep warranty and insurance, many people have (the flue of) the installation carried out or checked by a certified installer.
Which flue diameter does a pellet stove need?
Usually 80 mm for appliances up to about 10 kW. At higher output or a long run, 100 mm is used. The pellet flue must be gas tight, because it is under positive pressure.
Can a pellet stove go on an existing wood burner flue?
Often yes, with a reducer from, say, 150 to 80 mm. The condition is that the existing flue is clean, in good condition and able to be made fully gas tight. Have this checked.
What happens during a power cut?
Then the pellet stove shuts down. The auger, ignition and fans run on power, so no electricity means no heat. The stove goes out in a controlled way. If you use it as your only heating, keep this in mind.
How many pellets do I use per year?
As supplementary heating, about 1,000 to 1,500 kg. As main heating, 1 to 1.5 tonnes, or 65 to 100 bags of 15 kg. A 15 kg bag costs 6 to 8 euros on average.
Is a pellet stove more economical than a wood burner?
On efficiency, yes: a pellet stove reaches 85 to 95%, a modern wood burner 75 to 85%. Pellets burn more efficiently thanks to their low, constant moisture content. A wood burner wins on atmosphere and works without power.
Get going with heating and saving
Installing a pellet stove well comes down to getting the basics right: the correct flue, a safe discharge, dry pellets and smart maintenance. Do that well and you will have comfortable, efficient heat for years.
Want to look further into how to heat your home smartly and affordably and save energy? Then take a look at Energie Verpulveraar. There you will find practical, plain spoken explanations to bring your heating costs down and make your home more sustainable, exactly as you are used to from us.