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Nuernberg7725 May 2016 10:20Hello, I have a fully renovated old building (built in 1957), completely insulated and equipped with solar thermal systems, and I need to replace the existing gas boiler. Now I am considering whether to go for a gas condensing boiler or wood pellets. Does anyone have experience with both and can offer advice?
I am a fan of wood pellets and don’t like gas at all (I’ve explained my reasons somewhere else). You can get several thousand euros in subsidies from BAFA for pellets, but nothing for gas. A pellet stove (water-heated) can also be integrated decoratively into the living area. If you prefer wood, you can also consider a log boiler or wood gasifier, which have more advantages than oil, gas, or pellets.
We don’t have a pellet storage room, which wouldn’t be technically feasible for us to fill pneumatically, but pellets are also available in bags.
We don’t have a pellet storage room, which wouldn’t be technically feasible for us to fill pneumatically, but pellets are also available in bags.
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Nuernberg7725 May 2016 14:18How often do you need to refill when using bagged material?
So, my pellet stove has a minimum consumption of 1 kilogram per hour (4 kW minimum output). With a 25 kg (55 lbs) bag, it would last a whole day. However, the hopper holds 37 kg (81.5 lbs). This means it can run for almost one and a half days at minimum output. This is a boiler with manual loading, so without an auger (Red compact Slim).
That's quite a difference compared to the wood stove, where I have to add fuel every 20 minutes.
That's quite a difference compared to the wood stove, where I have to add fuel every 20 minutes.
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Nuernberg7725 May 2016 14:30How difficult is this refilling process? I am a woman living here with my two children... can I manage it on my own?
Take the sack, open it, put the sack in, done 😉 (without plastic, of course)
There are also smaller packages; 15 kilograms (33 pounds) is a common size, which I can easily lift. I’m female and not particularly strong. The effort also depends a bit on how far the delivery location (pallet) is from the storage area. For us, it’s 50 meters (55 yards), and last summer we easily moved almost 2000 kilograms (4400 pounds) of wood briquettes in 2–3 hours with breaks, working as a team of two. Using a hand truck works really well for this.
There are also smaller packages; 15 kilograms (33 pounds) is a common size, which I can easily lift. I’m female and not particularly strong. The effort also depends a bit on how far the delivery location (pallet) is from the storage area. For us, it’s 50 meters (55 yards), and last summer we easily moved almost 2000 kilograms (4400 pounds) of wood briquettes in 2–3 hours with breaks, working as a team of two. Using a hand truck works really well for this.
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