Pellet fired boiler – new system ideas – Page 2 – Chat Forum

infidel · 2014-11-16T09:45:36Z

So I thought I'd start this thread as there is a lot of forum interest in biomass. I'm off the gas grid and heat the house with coal so am changing to biomass. Green deal assessment done - all cavity walls are insulated and I now have 30cm loft insulation. We already have solar thermal on the roof. We have had three quotes for systems. These will be housed in a shed in the garden with super-insulated pipe to the house. All three have specified the same size boiler - 15KW. All three boilers are Austrian - Okofen, Biotech and Hapero. I have found a fair bit of information about the first two but very little about the third. I think the Biotech quote is out the window as the company has only been installing for a year or so and were really more interested in trying to sell me an air source heat pump so that leave Biotech - the guy has installed 50 systems in the last 7 years in the area and seems highly competent. He is convinced we need an 800L buffer tank with the system and says that although they can be installed without, the addition of one makes it more efficient. The Hapero guy has installed lots of pellet boilers but this would be his first Hapero. He says no buffer tank is needed. Both systems would be weather compensated. I've had a long email chat with Stoner and remain a little unsure of which quote to go for. A bit more interrogation of the two quotes to follow. Does anyone have any insight into the brands or the use of a buffer? There seems to be a lot of contradictory evidence online about the latter. I'll keep the thread updated as we progress with pics etc!

infidel

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I've got a pallet of celotex to insulate the shed. Should be pretty toasty I think.

Posted : 07/03/2015 12:46 pm

infidel

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So things are coming along. Due to commission the system on Tuesday.

We have replaced all the radiators in the house and flushed the system several times with cleaner.
The pipework is done ready to disconnect the fuel stove and switch to the Hapero.
The accumulator has been tweaked and we have good water pressure/flow.

The energy house is almost complete:

[img] [/img]

To dos include the wiring (including inverter etc for the PV due to go on the south roof), curtain drain / guttering / ridge tiling and compounding the shed. And a million and one other little jobs that I keep thinking of - such as a limescale filter on the water main!

Posted : 12/03/2015 10:08 pm

infidel

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Well we are commissioned and have been running for 5 days. So far I am delighted! A leaky pipe when we pressurised the system was fixed fast and the boiler has been working away merrily, the house is warm and everything seems good so far.

We are using a weather compensated system and I thought the external sensor was ugly so hid it...

[img] [/img]

The PV is on and running happily:

[img] [/img]

and the inside of the boiler house is coming together. Still not insulated it yet.

[img] [/img]

Posted : 20/03/2015 10:04 pm

flip456

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Topping up the hopper at my stepdads place this morning. Its amazing how much timber the thing gets through through.

[url=http:// http://www.photobox.co.uk/my/photo/full?photo_id=20691050533 ][/url]

Posted : 21/03/2015 2:52 pm

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[Closed] Pellet fired boiler - new system ideas