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What size and type of turbine is most suitable for my site?

Posted by Graham Eastwick on 26 June 2009 at 10:28 am

What size and type of turbine is most suitable for my site?

Choosing the best wind turbine for your site will depend on a number of factors. The first thing is to determine if you have enough wind. A national database of wind speeds is available and will give you an indication of the wind speed at your home. This can be accessed fr…

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How important is air-tightness to energy efficiency?

Posted by Tim Pullen on 24 June 2009 at 11:07 am

How important is air-tightness to energy efficiency?

A reader recently asked about a seeming conflict between the  modern approach to building energy efficiency which, amongst other things,  focuses on good air-tightness standards, and combustion appliances, such as  wood stoves, most, but not all, of which take their air from inside …

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Renewable energy for Devon

Posted by Cathy Debenham on 21 June 2009 at 11:19 am

Renewable energy for Devon

As a Devon resident it's great news to hear that our county council has won a prestigious award for its efforts to support renewable energy and boost a green rural regeneration. Devon County Council won the second local authority prize in the Ashden Awards for Sustainable Energy earlier this mon…

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UK renewables lag behind Europe

Posted by Cathy Debenham on 17 June 2009 at 10:53 am

UK renewables lag behind Europe

I’ve got good news and bad about the UK’s efforts at introducing renewable energy. For all the Government talk, you’d think that we’re doing quite well at generating heat and power from renewable sources. But, no, we’re not. In fact, if we compare ourselves with other European countries, o…

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Insulation is free for everyone in Kirklees

Posted by Cathy Debenham on 15 June 2009 at 11:37 am

Insulation is free for everyone in Kirklees

You don’t read much that’s complementary about our elected representatives at the moment but at last week’s Ashden Awards I met a councillor for whom I have enormous admiration. As leader of Kirklees Council, Councillor Kath Pinnock persuaded her fellow councillors to invest £9m in Kirklees W…

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Sustainable energy solutions recognised by Ashden Awards

Posted by Cathy Debenham on 12 June 2009 at 2:42 pm

Sustainable energy solutions recognised by Ashden Awards

Inspirational people combined with sustainable energy technologies makes me feel hopeful for the future, and at the Ashden Awards ceremony last night both abounded. The winners spoke humbly about their achievements, yet many of them are significantly transforming people's lives. For example the …

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Wind power without the guesswork

Posted by Cathy Debenham on 10 June 2009 at 11:01 am

Wind power without the guesswork

Measuring wind power to see whether it makes sense to get a wind turbine has, until now, been either expensive or inaccurate. Now with the launch of the Power Predictor, it’s possible to take the risk out of what is a significant investment. The device is the invention of Toby Hammond, managing…

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2009 is the year for hydro power

Posted by Matthew Rhodes on 8 June 2009 at 6:12 am

2009 is the year for hydro power

For reasons that escape me, we have been asked to do more small scale hydro power projects this year than ever before. Hydro projects are a personal favourite of mine because they are the most bespoke of any renewables, and because they often involve the most interesting local issues. History comes …

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Solar photo competition

Posted by Cathy Debenham on 5 June 2009 at 10:09 am

Solar photo competition

We Support Solar is running a photography competition to celebrate daylight in the UK. The campaign group is a network of organisations (including YouGen) and individuals who want solar power to be an important part of the renewable energy mix in the UK. To enter the competition you need to take…

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Windows: single, double or triple glazing

Posted by Tim Pullen on 3 June 2009 at 10:07 am

Windows: single, double or triple glazing

If you are thinking about changing your windows you will need to think about U-values. A U-value measures of the rate at which heat escapes through a fabric, so the lower the figure, the better.  A U-value of zero means that no heat is escaping.  It is expressed as Watts per square metr…

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Selling the electricity you generate

Posted by Cathy Debenham on 1 June 2009 at 10:12 am

Selling the electricity you generate

If you think that choosing your utility supplier is complex and painful, then just wait until you start exploring the tariffs for exporting the electricity you generate back to the grid.  There are two main ways of selling your electricity. Some suppliers pay for all the electricity you gen…

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A short break

Posted by Cathy Debenham on 22 May 2009 at 9:57 am

A short break

YouGen's bloggers will have a week off while I go on holiday. Normal service returns from 1 June. …

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Solar thermal for space heating

Posted by Gabriel Wondrausch on 21 May 2009 at 10:23 am

Solar thermal for space heating

I am often asked whether a solar thermal system can be used for space heating as well as for hot water. Technically, it can.  However in most cases it is neither cost effective nor energy efficient to do so.  The cost of upgrading the system to work with space heating as well as hot w…

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Support for solar hot water in Warwick

Posted by Cathy Debenham on 20 May 2009 at 10:18 am

Support for solar hot water in Warwick

Doubling the number of solar hot water systems installed homes in Warwick District is the aim of a great new project to support homeowners. The Solar 300 Challenge was launched last week by Action 21, a social enterprise which helps people live more sustainably. Their aim is to encourage more p…

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Rainwater harvesting is good for business

Posted by Barry Nutley on 18 May 2009 at 11:08 am

Rainwater harvesting is good for business

Rainwater harvesting systems can provide a variety of economic benefits to businesses. Alongside the standard irrigation and toilet flushing, it can also be used for cooling systems. In some areas it also reduces the risk of flooding. Generally, the systems with the fastest payback periods us…

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PV systems need an efficient inverter

Posted by Graham Eastwick on 15 May 2009 at 11:07 am

PV systems need an efficient inverter

Photovoltaic (PV) cells and modules are only part of the picture when you consider the efficiency of a solar electricity generating station. Key to an effective PV system is an efficient inverter, which converts the direct current (DC) electricity produced to AC (alternating current or mains equiv…

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Electricity meters about to get smarter

Posted by Cathy Debenham on 13 May 2009 at 1:55 pm

Electricity meters about to get smarter

A smarter grid, more suitable for transmitting renewable energy, is a step closer with the Government’s announcement on Monday that every home in the UK must have a smart meter installed by 2020.Smart meters transmit and receive information from your electricity or gas supplier in real time. This …

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Energy measuring brings highs and lows

Posted by Cathy Debenham on 11 May 2009 at 11:27 am

Energy measuring brings highs and lows

I find energy use and carbon emissions difficult to get my head around. You can’t see them or touch them. A monthly direct debit or quarterly bill are distant from the actual use you make of gas, electricity or oil. However, I’ve found a way to make them more visible. I’ve been measuring my us…

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What's the point of a cavity wall?

Posted by Tim Pullen on 5 May 2009 at 2:30 pm

What's the point of a cavity wall?

Once again I recently surprised a client by suggesting that single-skin timber-frame wall construction would be a good idea. Shock and horror hardly describe it. It was like I suggested that his children be sold into slavery to fund the new home. But think about it, what is the point of the cavity? …

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Kevin McCloud champions energy efficiency

Posted by Cathy Debenham on 29 April 2009 at 8:03 pm

Kevin McCloud champions energy efficiency

Self-build guru Kevin McCloud has added his weight to the call for more energy efficient homes, with the launch of the Grand Designs Great British Refurb campaign. While we know and love him for bringing the ups and downs of building a dream home into our living rooms, Kevin is focusing firmly on ex…

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