Category Archives: Heat Pumps


The new isoenergy website is now live. Some of the new or improved features include:

  • Up to date information on all grants and tariffs available
  • Details of how our renewable technologies work
  • A downloads section
  • An improved FAQ section
  • Information on isoenergy’s service and heat pump repair department
  • More pictures
  • Easier navigation
  • And much more

With the rapidly changing landscape of the renewables industry, the new site is an essential element in making sure isoenergy can provide clients with proof of our continued success and quality.

CLA Game Fair cancelled due to adverse weather

ORGANISERS of the CLA Game Fair have been forced to cancel the event, which was due to take place at Belvoir Castle next weekend.

They blame the recent heavy downpours for the “heartbreaking decision” to cancel.

Official statement given by Ed de La Rue, Head of Exhibitions, CLA:

“It is with great regret that we need to tell you that the CLA Game Fair 2012 has been cancelled due to adverse weather and ground conditions. We were forecast 36 hours of drying conditions, which we have had. We hoped that this would have been enough to dry out the waterlogged ground. Unfortunately, the benefit has been negligible and as such it would prove impossible to allow the 3,000-4,000 vehicle movements still required to build the show.

Every effort has been made over the past few weeks to protect the integrity of the ground and all parties involved have been exceptional in their efforts to try to make sure the show went on. The weather forecast is predicting significant further rainfall in the next 48 hours. The situation looks set to only deteriorate from this point on.

This knowledge combined with increased health and safety risks during the build and for the public during the three days of the CLA Game Fair has led us to the point where we do not believe we can deliver the show.”

Isoenergy will be exhibiting at this event next year and would like to thank the CLA for offering this advice in good time.

Isoenergy win at National Heat Pump awards 2012

Archimedes Screw

Isoenergy win at National Heat Pump awards 2012

Friday 1st June 2012

Nominated for our work in designing, supplying and installing a system that generates heating and hot water from a heat exchanger located in the former mill wheel pit at a property near Farnham, isoenergy accepted an award at the National Heat Pump Awards last night.

Invited by both Nibe and Viessmann Isoenergy was nominated for four awards and short listed for two.

A great deal of thanks and congratulations are due to all those who worked on the project including our client who had the drive to push for installing renewable energy systems.

We have worked in conjunction with Viessmann and mannPower Consulting to install an Archimedes screw that provides enough electricity to power two heat pumps. Not only does this reduce our clients running costs, it generates a payment for returning electricity to the grid. The heat pumps are configured with a heat exchanger to take heat from the water which formerly passed through the mill sluice. The plate heat exchangers are steel plates located in a pit beneath the Archimedes Screw.

IEA Cannot Stem Higher Oil Prices (UPDATED)

In a recent article by the Daily Telegraph, it was noted that the IEA’s recent attempts to stem the increase in oil prices has created a large amount of concern, rather than quelling fears.

Key to these fears are the limited impact the IEA has had on oil prices by releasing extra from it’s reserves, a drop of 9c per barrel to be exact. The reason for this was apparently to counter loss of supplies in Libya, but also comes after Opec (the cartel that produces almost half of the world’s oil) refused to increase production despite Western pressure.

The IEA’s supply will always be limited and it’s influence stemmed by the amount of oil it can hoard, but this another clear demonstration of the unavoidable and consistent rise in oil prices.

Regardless of the IEA and Opec’s spats, it is just as plausible that Opec’s refusal to increase production is more than motivated by profits. The squeeze on oil supp

lies can be a major factor. The increasing scarcity of oil will hopefully finally start to make an impression on Western governments, that still offer a comparatively good deal when passing fossil fuels on to consumers.

With the Renewable Heat Incentive due to start imminently, and evidence like the aforementioned article, the increased profitability of heat pumps becomes more apparent. For large, country properties running on oil, the escalating costs needn’t be a concern if an initial investment is made in micro generation.

For more information on how to stem oil dependency, head to or call 01293 821345


True to initial concerns, the IEA and Opec quibble has caused the price of oil to start rising rapidly amidst concerns that output from the cartel may actually decrease rather than stay at current levels, which are unfavourable to Western powers.

UK Feed in Tariff rises by 4.8% & Isoenergy New Website Launches

The UK government Feed in Tariff has risen by 4.8%.

This decision is an extra boost for the FIT before implementing the recently announced plans to fast track a review of solar farms and large scale system, which will likely see great reductions in tariff levels for systems that the government feels is missing the point of the FIT.

For now, a typical 4-10kW solar pv system will get a bump from 36.1p per kW/h to 37.8p. Head over to isoenergy’s Feed in Tarrif FAQ section for a full table of the updated rates.

New Isoenergy Website

The new isoenergy website is now live. Some of the new or improved features include:

  • More information, in an easily digestible format
  • Up to date information on all grants and tariffs available
  • Details of how our renewable technologies work
  • A downloads section
  • An improved FAQ section
  • Redesigned case studies both on the website and to download
  • Information on isoenergy’s service and heat pump repair department
  • More pictures
  • Easier navigation
  • And much more

Head over to isoenergy now to see what has changed. With the rapidly changing landscape of the renewables industry, the new site is an essential element in making sure isoenergy can provide clients with proof of our continued success and quality.

Feel free to comment on the site, or let us know via isoenergy’s twitter account what you think.


The EST: Good News or Bad News for Heat Pumps?

The Energy Savings Trust has caused quite a stir. Following the publication of a look into nearly 100 Ground Source and Air Source Heat Pump installations across the UK, the initial results are less than impressive. The EST’s summary on the report are as follows:

You should consider a heat pump if you live in a:
• Well-insulated existing property that cannot access the gas network. Heat pumps have the potential to reduce running costs compared with oil, direct electric, LPG, or coal, and can provide substantial carbon savings over the lifetime of the installation.
• New-build property.

How to get the best performance from a heat pump
• Ensure your dwelling is insulated as much as possible (e.g. cavity and loft insulation) prior to a heat pump being installed
• Install the heat pump with low temperature under-floor heating or properly sized radiators
• Insist upon understandable, user-friendly controls.

What to expect from a heat pump
• Since heat pumps provide a lower temperature heating compared with boilers, radiators will be warm rather than hot
• A house with radiators may heat up more slowly
• The heat pump will run for longer hours than a conventional boiler but if properly controlled will switch on and off with the heating requirements of the house
• A properly sized and installed heat pump should be able to provide all of a household’s domestic hot water, but many systems are installed with a supplemental electric immersion heater.

What was not mentioned in the summary, and yet has been the main talking point of the research, was that of all the systems tested, the peak COP achieved was only 3.2, with both Ground Source and Air Source averaging a COP of 2.2. This is a far cry from the manufacturer’s claims in the product literature, which frequently claims between 5 and 7. The report itself recognises that none of the results achieved were as successful as similar tests held in Europe.
So why have the UK’s Heat Pumps failed and is this all bad news for the UK’s renewable targets?
The primary causes for the poor performance are three fold; cheap or unsuitable equipment, incorrectly installed systems and the differences in the British climate. This is then often compounded by complicated controls that the user cannot effectively manage. Overall, it paints a relatively grim picture of the level of expertise and understanding of the technology in the UK. Although it does not bode well, there is a positive aspect to the findings for Justin Broadbent, MD of isoenergy who have been designing and installing heat pump systems since 2005, “I think people’s confidence in Heat Pump’s has been damaged, but it does finally prove what we have been trying to say at isoenergy for years – you simply can’t get away with throwing in any old cheap bit of kit and expecting it to work.”
Isoenergy has been extolling the virtues of higher quality, more efficient and longer lasting systems. The systems are installed by an in house team of highly qualified engineers and are then supported with a thorough post-installation service policy. These have been core principles at the company, but are evidently being lost along the way by other installers. It is for that reason, and hopefully to prove the true potential of Heat Pumps, that isoenergy are hoping to be part of the EST’s next stage of research.
It may be an uncertain time for Heat Pumps, but if this wobble will result in only the best installers being trusted with an important part of the UK’s micro generation future, it will be well worth it in the long run, both environmentally and financially for the system’s owners.

Renewable Heat Incentive (RHI) Dead!?

The Daily Telegraph has today published an article claiming that the RHI will probably be radically overhauled following a review of the scheme.

The full publication of the findings has been delayed again until later this year, but it is expected to illustrate a variable quality of the heat pump sites examined.

The EST, who will be producing the study, has claimed that they want to iron out the variations in data before publishing the study, although this has not quelled speculation about a “scrapped or scaled back” version of the RHI.

However, ministers such as Charles Hendry and Greg Barker have recently reaffirmed the Coalition’s commitment to supporting the installation of heat pumps.

For more information call 01293 821345 or click here.