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Wood / Chip / Pellet Biomass Boilers

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McDonald Engineers

Wood Biomass Boilers, Log Boilers, Pellet Boilers and Chip Boilers

Gondwana Green Heat is a Hetas and mcs approved contractor of woody Biomass Heating Systems, supplying, designing and installing small to large scale biomass systems.

Please see below information regarding some of the systems we are involved in. If you have any queries don’t hesitate to get in touch.  We are pleased to introduce to you a wide range of biomass products from Europe, Hargassner from Austria, Ariterm from Sweden, Eco Angus (orlingo) from Poland and Red part the MCZ brand from Italy.

1. Log boilers

Log Boilers also known as Batch Boilers. These gasification biomass boilers burn wood logs / briquettes and charge (heat)  large accumulator tank of water from where the water can be used for, industrial process’s, space heating or hot water to the taps.  This is the cheapest form of biomass boilers, but obviously does require you to set a fire a couple of times a day in winter and maybe every 4-7 days in summer.  Log gasification boilers are available from Gondwana Green Heat from 18kw to 130kw, however larger installs can be easily achieved with several boiler working together.

EcoAngus Wood fired boiler

2. Pellet Boilers

Pellet Boilers, most people will now be familiar with wood pellets as a form of wood fuel, but if you are not, wood pellets are compressed saw dust to form a round wood fuel.  Pellets are very dry typically 5% -10%   and can come in small 10kg bags or alternatively in a tanker and blow in.  The more pellets you purchase the cheaper they become, typically between £200 – £300 per 1000kg / 1 tonne. It’s also important to realize you should only use hetas approve pellets, be aware of poor quality cheaper pellets as they will increase the chance of breakdown and generally have poorer energy value (calorific value).

Pellet Boilers work differently from log gasification boilers in the way they are automated and fire up when there is a heating demand.  Pellet boilers are available with large hoppers which hold pellets and are feed into the boiler on demand, other boilers have  built in hoppers and can be filled using bagged pellets typically.  Small pellet boilers and domestic systems as well as small pellet stove boilers often have built in hoppers, however these can often be upgraded to attach to a silo / pellet storage facility to feed pellets automatically into the boiler.  The main benefit of pellet biomass systems is the automated nature of the system and can be similar to oil or gas systems in form of operation / maintenance.  Gondawana Green Heat installs pellet systems from 3 kw upwards, we don’t have a upper limit due to the range of manufacturers we work with.  Please see the link below for a good quality pellet supplier.

3. Wood Chip Biomass Boilers

Wood Chip Biomass Boilers burn waste wood which is put through a chipper to create a wood fuel, most chip boilers are for larger commercial or industrial set ups due to the higher capital cost involved.  If you have your own source of wood chips e.g.  estate, farm, industry etc they can be a very cheap system to run.  All of our chip boilers have automated ignition and fire up on demand making them similar to pellet boilers in operation.  Like pellet boilers wood chips are stored  and collected by a delivery system which is fed into the boiler.

Wood chip biomass boilers

4. Log / Waste Wood Forced Air Biomass

Forced Air Biomass boilers are not that common in the UK, this type of boiler burns logs or waste wood and is common in commercial space and workshops.

How it works
If you imagine a drum in a drum, a fire is set in the inner drum which heats up the space between the 2 drums, the hot air between the 2 drums is then blows through ducting to heat the space, no radiators, no hot water simply forced hot air.  The main benefits are  low capital cost compared with other forms of biomass, quick heat up of property and easy to use.  We also sell a small range of pellet fan assisted  stoves which are fan assisted to push air through ducting or through the grill on the stove, these are ideally suited for smaller or more better insulated spaces.

boiler stoves

5. Biomass Boiler Stoves

Please see our boiler stove pages

Biomass Boilers are a great replacement for oil and gas with no need to change existing heat emitters.  Biomass boilers can be used to heat tiny property’s to large commercial buildings, there really is a biomass product suitable for everyone.

Gondawana Green Heat is also heavily involved in district heating where multiple homes, apartments, commercial buildings are heated from one biomass boiler this can help reducing the initial cost as well make fuel cheaper to buy in bulk.

Biomass boilers are  particularly popular in rural areas where town gas is not available and oil prices are soaring. However we have seen massive interest in small pellet boiler stoves recently as people go green in mains gas areas too.  The other main reason home owners, commercial space and local authority are interested in biomass is the grant system.

EcoAngus Orligno 500 Pellet Boiler