The preferred technology

IEC Heat Solutions are approved installers of ground source heat pumps manufactured by Oilon. Oilon are an international company who are based in Finland, with production facilities on 3 continents and a global dealer network.

The Oilon Chillheat pumps have proven themselves to be versatile and reliable, and the level of support and customer service they provide makes them an ideal partner for IEC Heat Solutions.

The Oilon pumps were selected for several factors which are critical to the operation and feasibility of ground source heating installations:

Key features

  • Excellent efficiency even at high temperature
  • Flexible automation & remote operation capabilities
  • Excellent part load run conditions
  • Compact size
  • Sound proofing enclosure for low noise & low vibration
  • Every unit subject to a factory run test prior to shipment
  • Ability to heat and cool using the same GSHP unit

IEC specialise in the modelling, installation and maintenance of the Oilon Chillheat ground source heating systems, and will help you to understand and operate your heat pump from commissioning onwards.  As always, our customer service and maintenance teams are on hand to ensure that your pump operates to its fullest potential.

Basic principles of heat pump technology

Take a look at this diagram to understand the basic principles of heat pump technology

  • The ground source heat pump operates by collecting energy from a ground loop heat source, and using this to heat the refrigerant liquid inside of an evaporator.
  • This liquid becomes a gas, which is pushed through a compressor to heat it to a high temperature.
  • The gas is then sent to a condenser, which cools the gas by heating water for distribution to the heat use.
  • The cooled gas returns to its liquid state, and is sent back to the evaporator to begin the process again

Ground Source Heat Pumps are run by electricity alone, and so do not rely on fluctuating fuel supply issues.  This electrical power demand means that the Co-efficiency of Performance (COP)  of the unit is of paramount important- meaning that the ratio of heat generated (kWh) for every unit of electricity used within the process should be as high as possible.

IEC specialise in maximising this COP to provide the greatest amount of heat or cooling at the lowest possible cost.

click here to visit our projects page to see recent installations we’ve carried out.

Poultry farm Herefordshire

Manager / Poultry farm Herefordshire

We had a full turnkey biomass heating package from IEC Heat Solutions into six existing poultry houses. From the installation engineers to the surveyor, they were most helpful and your installation team got the job done very efficiently. The electrician explained what was going to happen on the day and was able to answer any questions I had. The 995kW Linka boiler with a multi fuel feeding system is working at top efficiency.

Richard Williams

Owner / Lyonshall

I was thoroughly impressed with the IEC team’s obvious knowledge and their attention to detail throughout. It’s also reassuring to know that they are still on hand 24/7, should I ever need them.



IEC Heat Solutions’ commitment is unbelievable and they are very professional from start to finish. I love working with them: they can’t do enough to help. The whole package, everything about boilers, has been first rate. IEC is a real can do company and I know Keith would not tolerate second best.

Farm Owner

Manager / Hertfordshire

As arable farmers, we chose IEC because of their demonstrable experience and passion in making straw work as a biomass fuel. It’s early days but we are very confident this has been the right decision. The team has been extremely committed, working long hours to meet tight deadlines. The service engineers have been brilliant in ensuring that everything continues to work well and that our team is confident in operating all of the biomass equipment. We’re pleased with our multi-fuel feed system, which can take Hesston bales or woodchip.

Andrew Davies

Manager / Herefordshire

I chose IEC because of their ability to engineer systems which suit the needs of different customers, as no two farms are ever the same. The commitment from all the team is unbelievable. They can’t do enough to help you. I wouldn’t hesitate to recommend them to anybody.

George Rees

Owner / Hampshire

I’m delighted with how everything has gone and the system has lived up to all expectations. Everyone at IEC has been excellent throughout. They are very professional company to work with and, because they are farmers themselves, they are all on the same wavelength as me. I’d happily recommend them to others.