BSL/WOODSURE

You should have somewhere an OFGEM emissions certificate, it would have been part of your RHI application. This will state the fuel you can burn, how ever i cant see anywhere where it states a size G50 or G30.

Maybe its the EN XXXXXXX code that stipulates size.

Possibly the installer will have a copy, or they should.

3. FUELS
a) Types of fuels used when testing
(Where relevant, the fuel should be classified
according to EN303-5, referencing the relevant
EN14961 standard for specific classification
(superseded by EN17225). We don’t expect broader
categories such as ‘beech’.
Woodchip – (EN ISO 17725-4: 2014,
Class B2)
Coffee Pellets – (EN ISO 17725-6:
2014, Class B)
b) Based on the testing, list the range of fuels that
can be used in compliance with the emission limits of
30 grams per gigajoule (g/GJ) net heat input for
particulate matter (PM), and 150 g/GJ net heat input
for oxides of nitrogen (NOx)
(Where relevant, the fuel should be classified
according to EN303-5, referencing the relevant
EN14961 standard for specific classification
(superseded by EN17225). We don’t expect broader
categories such as ‘beech’.
Woodchip – (EN ISO 17725-4: 2014,
Class A1, A2, B1 & B2)
Coffee Pellets – (EN ISO 17725-6:
2014, Class B)
c) Moisture content of the fuel used during testing. (If
multiple fuel types have been tested state all.)
Woodchip - (EN ISO 17725-4: 2014,
Class B2) – 40%
Coffee Pellets – (EN ISO 17725-6:
2014, Class B) – 9%
d) Maximum allowable moisture content* of fuel
that can be used with the certified plant(s) that
ensures RHI emission limits are not exceeded.
*This value may be obtained from ranges specified
in relevant EN14961 standard for specific fuel
classifications or EN303-5 when not applicable.
Different fuel types should state different
maximum allowable moisture contents.
Woodchip (EN ISO 17725-4: 2014)
a) Class A1 – 10%
b) Class A2 – 35%
c) Class B1 & B2 – 40%
Coffee Pellets (EN ISO 17225-6:
2014)
Class B – 15%

Sounds like your boiler is only authorised to use G30 chip and you have a G50 screen in your chipper. Dont take it personally but its just a way of getting you removed off the B*ll SH*T List. I told them where to stick it right at the start as I could see the potential problems.

We've got issue in that although we've got all the certification, our installer, with whom we have a multi-year service contract, has just announced he's not doing it any more, find someone else. All whilst we'd been pestering him for months to come and service the boiler and fix a couple of minor issues...2 of which he broke himself on his last visit!!

Clowns all over the shop.

pbg somerset said:

I chip wood for my own boilers , as part of this I now have to send in samples for testing . My last sample "failed "apparently chip size was not g 30 but did clarify as g50 . Firstly I think looking at the pile of chip they are wrong in this, looks pretty small to me and it all passes through a g 30 template I have .
Secondly they
tell me my registration will be cancelled in 7 days unless I can show the boiler is ok with my chip either emission certificate of other info , which I can't find !
The limited window in which to deal with this is pretty unfair . Apparently I can send in another sample but cost £60
Not sure how to proceed now ?

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I do find this situation odd, because really G30 or G50 is only a restriction in that the G50 might get stuck in a smaller boiler's auger system and cause the boiler to trip off.
It has nothing to do with emissions, only an inconvenience for the operator.

rollestonpark said:

I do find this situation odd, because really G30 or G50 is only a restriction in that the G50 might get stuck in a smaller boiler's auger system and cause the boiler to trip off.
It has nothing to do with emissions, only an inconvenience for the operator.

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Has everything to do with emissions. If the only feedstock approved on the official boiler test is G30 then that is the only fuel you can use even if the boiler was originally designed and manufactured to use G30, G50, grain, olive pips, etc etc.

renewablejohn said:

Has everything to do with emissions. If the only feedstock approved on the official boiler test is G30 then that is the only fuel you can use even if the boiler was originally designed and manufactured to use G30, G50, grain, olive pips, etc etc.

Click to expand...

OK I stand corrected sorry...

What type of boiler is it? You may be able to find the Emissions Cert on google?

I spoke with an HETAS assessor in person on a site (who was a retired chimney sweep!) and he said the HETAS/Woodsure is in crisis. Dozens of new staff everywhere with knowbody knowing what to do. The govenment offered hetas the contract to do all this work, the directors saw pounds signs BUT they offered no money upfront but said they could keep the fees. So it appears in my travels as a RHI & BSL consultant that the majority of people get the "2 bits too long" letter, please send another 60 quid. So .GOV sets the fees and allows the £60 extra surcharge on each test, that is a nice earner with zero comeback. What do you do?

I have clients who are wood chipper/producers and every mobile chipper produces failure "pencils" often 1 or 2 mm thick but too long, the only people who don't are perminant set ups with trommels or people who set their chippers so small they produce muesli.

I also asked why the f..k they are bothered if it is self supply. Apprently it is to protect my clients boiler from himself, he is too stupid to realise that two long stringby bits will bust his boiler and they are concerned for him.

The only way is spread it on the table and get the tweezers out, but we did that, split it into two samples, one passed one failed and the results read like completly different samples!!!!!!!