Monday, 30 May 2011

The value of an 80% carbon reduction

Few people seem to appreciate the scale of change that is required if we are going to meet the carbon reduction targets needed to prevent climate chaos.

When Rosemary and I founded Cambridge Carbon Footprint (CCF) in 2005, we were aware that in spite of some thirty years of government advice on saving energy, (whether to conserve oil reserves, control pollution or delay climate chaos) little has been achieved, particularly in the domestic sector.

Tackling carbon reduction in your home is clearly a complex task, involving both understanding of the technical working of the building and appreciation of your own and your family’s feelings about your home. What has been clear in the work of CCF, is the difficulty of focussing on the latter and the ease of slipping into detailed discussion of the technical details, kilograms of carbon and rates of return.

There are a number of reasons why this can be counter productive. To begin with, I suspect a lot of talk about details is prevarication, avoiding the actual work of making reductions. While it is important to get things right, it may be more important to make a start! I also think that concern for the details can also be a way of avoiding thinking about the size of the task.

Diminishing returns

We talk in Carbon Conversations about the need for 80% savings, which is no easy project. We help participants create a plan that may have to span several years to make it both possible and affordable. In making plans, it becomes obvious that the conventional rhetoric about saving energy and saving money does not hold water. In fact it gets progressively more expensive as the project goes on.

Of course there is the low hanging fruit, with little or no cost and significant savings. How many times are we told about over filling our kettle!

Then there are a number of things that have payback times we can relate to. But if filling cavity walls is such a winner, why are there still several millions houses still needing to be treated?

With the help of subsidies, some of the more expensive projects are promoted as having payback times of ten to fifteen years. The sums are not easy and they need to be weighed up with other things we may also not fully understand, like pensions and mortgages.

But more importantly, there are still a load of tasks that make no economic sense at all. While the cost of replacing the windows may be compared with the future value of the house, how do you cost the disruption of lifting and insulating below the floors? To achieve the 80% savings we need, we are up against the laws of diminishing returns. And while the costs are immediate and ours, the benefits are less specific and well in the future.

One response to these arguments has come from the theorists of Social Marketing. In CCF we found it helpful to listen to people who told us again that we must know our audience, that we must address their concerns and talk about things that matter to them. We recognised that we could talk about the status that might accrue from the solar panel on your roof, or the importance of recognising actions that fitted with the expectations of your friends and peers.

We have spent some time learning the techniques of motivational interviewing to help us scratch below the surface and work with people’s less overt desires and concerns.

Common Cause

But I am still nonplussed when friends and colleagues repeat that we just have to get over the message that saving carbon will save money and people will sign up to the 80% agenda.

So it has been a delight to find the Common Cause report, published last September by Tom Crompton, Change Strategist at WWF. It joins together two threads: values and messaging. I draw three points from it.

  • We have to be careful what we wish for. If we sell actions on the principle that it saves money, we will attract people who want to save money. They won’t then want to hear that they have to spend money to reach the next goal.
  • We have to realise that everyone is concerned about ‘bigger than self’ issues. The research on values shows that people are complex and often hold conflicting values at different times. While opinion surveys regularly throw up about 30% of the population who say they are not concerned with things that do not benefit them or their family, more careful research shows that they will hold more altruistic values too, although with less conviction or for less of the time. In the long run, we will achieve more if we speak to and reinforce this aspect of people’s values, than promoting the short term goals of small personal gains.
  • We have the same agenda as lots of other civil society organisations. Many of the other campaigns we support are also promoting ‘bigger-than-self’ values. While many other organisation’s concerns may not be environmental, they are as significant and intractable as climate chaos and it may also be the case that we have to solve these problems together.

I am convinced that we will make more progress if we make ’common cause’, speak the same language and reinforce the same values. So we have to promote eco-renovation because it matters; to the environment, to other people, to the future, but not to our bank balance or our image.

Tuesday, 22 February 2011

Ventilation for Fires

It' another "Ask Andy" for the Cambridge Carbon Footprint newsletter
Question:
Our builders are insisting that we install a ventilator in the living room, as we have an open fire. We don’t want more draughts. What should we do?
Answer:
Your builders are correct. Requirements for ventilation are set out in the Approved Document J “Combustion appliances and fuel storage systems” of the Building Regulations and applies to alterations. It says you need a "permanent open air vent" and that the vent should be at least half the area of the 'throat' of the fireplace chimney. That would be an air brick in the wall or a grille in the floor. It’s a lot of ventilation, but would be justified if you have gone to a lot of effort to seal your windows, doors and floor. I have done this myself and found the room filling with smoke when the fire was lit, as the chimney would not draw properly from the sealed room!
Open fires can look lovely and become the central attraction for the home. But they have two problems. When the fire is not lit, the flue will continue to suck valuable heat from your home, and cause draughts in the room. This is easily solved with a ‘chimney balloon’ or an old pillow in a plastic bag. At the same time, you might place some temporary obstruction over the fixed vent.
When the fire is lit, the amount of air drawn up the chimney is huge. A modern fire place with a properly deigned ‘throat’ at the base of the chimney will control this, but it will still draw much more air than is needed to ensure efficient burning of your wood. This will also cause a draught from the fixed vent, so the best place for it is in the floor near the fire.
If you replace the open fire with a stove, you remove the need for a ventilator and you still have a wonderful feature for your home. A stove with less than 5kw output does not require fixed ventilation, and when the fire is not lit you can close the vents and the room is well sealed. Some stoves have efficient “air washers” on the window, so you can see the logs burning. On ours, we leave the door open if we are wanting to enjoy the fire, but actually closing the door makes it easier to control and uses less wood.

Monday, 27 December 2010

Paper Logs

As a guardian reader with a log burning stove, it seems an obvious synergy to burn the huge pile of paper that collects each week. Here is my simple recipe for paper logs.

To ensure the paper burns slowly and efficiently, it must be made in to a tight roll. Folding the paper in 4 and rolling the sports section first and then the supplement creates a tight core and the rest is easy to roll around that.

Three or four editions roll up to a bundle about 8 cm across. It is then slid in to a wire former to contain it while it burns through. The wire frame is retrieved from the fire and allowed to cool before the next Dry Rolled Newsprint Log (DRNL) is made up.

The former was made from a piece of 2mm (14 SWG) galvanised wire. The prototype Brown DRNL used an old coat hanger and lasted a bit over a year. I knocked 2 nails half in to a seven centimetre dia log, wound the wire round the nails and the log with the help of a heavy duty pair of pliers and a lot of grunting. I then put the log in the stove and retrieved the former and nails when it had all burned away. See:

http://www.flickr.com/photos/22755595@N08/sets/72157625558981303

Research

Initially we bought an “Original Logmaker” from the Centre for Alternative Technology. it says

“Easy and safe to use - just soak the paper, place into the mould and squeeze. After complete drying, the log will burn as well as wood …”

We saved a load of paper over the winter, did all the soaking and pressing in the summer. It took weeks for the paper bricks to dry out and they had to be stacked in the wood shed.

The Brown DRNL can be made up from this weeks paper and put straight in to the stove.

Environmental Benefits

A little research indicates that there is not much difference in the environmental impact of burning paper and recycling it.

  • Much of our recycled paper is transported large distances from depot to de-inking plant to paper mill so that the energy and pollution balances the value of the recycled fibre.
  • I have heard that co-mingled recycled collections results in low grade paper (with contamintion from broken glass) so it has to be burnt anyway.)
  • Claiming that wood is a low carbon dioxide source of energy is not universally accepted. Growing trees is a carbon sink and the rest is offsetting!
  • Contaminants, such as ink, lead to more pollution in the smoke.
  • Making newspapers to support the renewable heat market is not sustainable
  • Significant uptake of the use of stove in urban areas will not help air quality.

In the long term, I will finish insulating the house and got the measure of reading the guardian on line.

However, if you want to post some links to online sources of information on these issues, that would be great.

In the words of Rodger MacGough “Although I live in a smokeless zone, I still enjoy the odd woodbine under the stairs”

Sunday, 28 November 2010

Should I install PV solar panels?

This is my "Ask Andy" contribution to the Cambridge Carbon Footprint December 2010 newsletter:

Last Saturday the Guardian devoted a four page supplement to the Feed-In
tariff, the scheme that earns you money for installing photovoltaic
solar panels on your roof. "Fit" as it is known, guarantees you 41p for
every unit of electricity the panels generate, as well as the 14p you
save from not having to buy the electricity.

The Guardian's Miles Brignal, says "So what's the catch? There isn't
one." For home owners this may be true. But is 'fit' a good policy? And
is it an equitable one?

The issues of Climate Change are wider than electricity generation and
must include proper concern for social justice, both in Europe and the
Global South. So who pays for 'fit'? Unfortunately, we all do, and as
usual, when we all pay, the disadvantaged pay more. The subsidy is paid
by the electricity producers, who in turn will claw it back from our
electricity bills. While I have been able to afford to insulate the
house, buy energy efficient fridges and boilers and reduce my
electricity demand to less than 2,000 units (1 tonne CO2 emissions) a
year, there are 3 million households classified as 'Fuel poor', who can
neither afford to pay their electricity bills nor make the improvements
that might help them economise. They will face a further £300 on their
electricity bills to cover the cost of 'fit'.

So should you install PV? Yes – if it's part of your plan for the
complete upgrade of your house and this is the right moment in that
plan. We are going ahead because if we don't do it now, while we are
fixing the roof, technical issues means we will have missed the
opportunity.

Climate change work is full of these contradictions, but we hope that
Cambridge Carbon Footprint can help you work through them. But it sticks
in the craw that this tiny contribution to UK renewables comes at such
personal gain to us and such personal cost to others.

And some more notes:

Corroboration from George Monbiot!
There is more discussion in the Ethical Consumer magazine september/october 2010 issue, which also provides rankings for PV panel manufacturers. Top of their list were GB-sol (manufactured in Wales) , Solarcentury
and Solarworld, Suntech, Yingli . At the bottom were Schott, Sanyo and BP .

More about Fuel Poverty and the inability of current policies to address it in Brenda Boardman's latest book, "Fixing Fuel Poverty" (Earthscan 2010)

More info about FIT at DECC and EST and Cambridge info from Transition Cambridge.
There
I can't really recommend installers, but various Cambridge Carbon Footprint supporters have been happy with
Solarworks Ltd , Chelsfield Solar and Midsummer Energy

Saturday, 17 October 2009

Heat exchange units

Another "ask andy" Query!
Hi
The market leader is Vent-axia (who have acquired Roof Units, who were
my favourite manufacturers ten years ago) see
http://www.vent-axia.com/range/heat-recovery-and-mechanical-extract-systems
The HR100 range are the room sized units.

We installed one in our bathroom. It cost about £120 plus installation and is effective but noisy.

Also
http://www.applied-energy.com/en/xpelair/products/range/1908
http://www.silavent.co.uk/products/heat_recovery/energex-features.asp
http://www.johnsonandstarley.co.uk/ventilation/single-room.asp
http://www.kair.co.uk/khrv150.htm
(distributors: http://www.kiltox.co.uk/products/hrv.htm)
and
http://www.admsystems.co.uk (I am not sure if they are installers or
manufacturers. Their illustrations seem to be other peoples machines!)
I will send this list to Tim, to help his research.

---
Penny wrote:
Hi Andy,
I have been going round and round various websites trying to find good
single room heat exchange units ....Any ideas of UK providers and how to find costs?