About Us

About Oxyvent

About Us

Anyone who has ever tried fishing knows that to catch a fish, it’s vital that you study the flow of the water. Growing up close to a small river near Killarney, Co. Kerry, meant that Tim Cremin learned this valuable skill from a young age. In fact it really helped him to feel comfortable when he decided to start plumbing… because when it comes to fixing heating systems – understanding your flow rate is essential.

Tim was always intrigued with the way heating systems performed. How they were designed, how they were installed and how efficient they were. He soon realised all the jobs that he’d get called out to do, the same problems kept popping up – Cold spots on radiators, not enough hot water, cold rooms and having to regularly bleed the radiators. Over the years Tim grew frustrated and even contemplated packing it in, because he never liked walking away from a problem and believed everything could be fixed.

Oxyvent apprentice of the year certificate

So Tim decided to try and find a way to solve these issues once and for all. He learned that Heating systems were originally designed to heat the building – not the occupants, and no real advances were made over the years to improve heating systems for our comfort. There was just no product on the market to help improve their efficiency.

He set about designing a square reservoir that could easily be attached to a heating system and would isolate the boiler cycle from the radiator cycle. He then refined the blending process of the heated water and discovered the New 2°C Delta T.

In science, “Delta T” is the difference in temperature between two measured points; in this case, it’s the temperature of the water going into the radiator and the temperature leaving the radiator. This tells you how efficient your heating system is. Since most heating systems operate on 11°C Delta T or higher, that means the water temperature can drop by at least 11 degrees. Tim’s invention brought that difference down to just 2o Celsius, massively improving the output of the heating system.

Tim carried out further research and development in Laboratories and more importantly, tested his new system in numerous real homes. He found not only did his 2oC Delta T improve heating systems and boiler efficiency, but it also solved the many common problems that had bothered him and his customer’s in the first place. E.g. Cold spots on radiators, not enough hot water, cold rooms and bleeding radiators.

In 2001 he filed a patent on his invention and set up his company. He took the name from the process of removing the excess air from the heating system, or Oxygen Venting.

Oxyvent offers a heating system like no other and has won numerous prestigious awards around the world. Tim wants everyone to know that it is possible for your heating system to work more efficiently, reduce heating bills and improve your carbon footprint with Oxyvent.

Tim Cremin Oxyvent
Oxyvent apprentice of the year certificate

So Tim decided to try and find a way to solve these issues once and for all. He learned that Heating systems were originally designed to heat the building – not the occupants, and no real advances were made over the years to improve heating systems for our comfort. There was just no product on the market to help improve their efficiency.

He set about designing a square reservoir that could easily be attached to a heating system and would isolate the boiler cycle from the radiator cycle. He then refined the blending process of the heated water and discovered the New 2°C Delta T.

In science, “Delta T” is the difference in temperature between two measured points; in this case, it’s the temperature of the water going into the radiator and the temperature leaving the radiator. This tells you how efficient your heating system is. Since most heating systems operate on 11°C Delta T or higher, that means the water temperature can drop by at least 11 degrees. Tim’s invention brought that difference down to just 2o Celsius, massively improving the output of the heating system.

Tim carried out further research and development in Laboratories and more importantly, tested his new system in numerous real homes. He found not only did his 2oC Delta T improve heating systems and boiler efficiency, but it also solved the many common problems that had bothered him and his customer’s in the first place. E.g. Cold spots on radiators, not enough hot water, cold rooms and bleeding radiators.

In 2001 he filed a patent on his invention and set up his company. He took the name from the process of removing the excess air from the heating system, or Oxygen Venting.

Oxyvent offers a heating system like no other and has won numerous prestigious awards around the world. Tim wants everyone to know that it is possible for your heating system to work more efficiently, reduce heating bills and improve your carbon footprint with Oxyvent.

Tim Cremin Oxyvent

What our customers have to say

  • “We are so delighted with the Oxyvent Tank since we got it installed in 2005. We have mighty heat from the radiators, and they are hot all over, different than before. Everyone that comes in remarks on the heat and are amazed when they see how low the boiler temperature is set. Prior to putting it in I would have the boiler temperature set high, it is now set to minimum. The Hot water in the tap is now boiling, a big difference from before. I had big savings in my oil bills over the years and I would like to wish you every success with the Oxyvent tank. IT’S A WONDERFUL PRODUCT!”

    Margaret, Tralee, Co. Kerry

  • “I installed the Oxyvent Tank in my oil fired heating system in 2008. Prior to installation I had a lot of trouble with air locks in my system. The Oxyvent Tank rectified this problem.

    Since installation my yearly oil consumption is significantly lower and thankfully my heating is a lot more efficient. I would confidently recommend this product without any hesitation.”

    Tom Browne, Co. Limerick

  • “We have a sizeable heating system which consists of 24 radiators ,we always seem to have a problem getting the heat to perhaps 5 radiators. At first we thought it maybe that our boiler was not sufficient enough to run the system, but we were reassured that the output of our boiler was more than enough to run the installation.

    We tried a more powerful circulating pump but this did not improve the situation. We heard of Oxyvent through a friend and requested an inspection. He explained what the problems were and recommended that we install the Oxyvent Tank.

    We could say the results were instant, we had on the first day pretty much all the radiators heating up to what they should be, from then on the system seem to improve and it definitely now is heating to its full potential.”

    Brian Kelly, Co. Cork

  • “We built a new house in 2004 and were very disappointed with the heat from the radiators. We have a bungalow and especially the two bedrooms at the back of the house were freezing, and in the winter we had to use electric heaters in those rooms to heat them. We had the heating on all day and the house was still cold. We heard about Oxyvent spoke with them about how the Oxyvent Tank would help us. We fitted the Oxyvent Tank in 2006 and could not believe the change. All the rooms heated up fast and the boiler had to be switched off after one hour as the house was roasting. Our fuel bills are down about 30% but the best result is the house is nice and warm. We could never fill a bath with hot water before and had to do with filling it halfway, and now we can have a nice full hot bath of water for the first time.

    A lot of our friends and family have the Oxyvent Tank in their homes and they are delighted with it. We would highly recommend to anyone whether they have an old house or new one.”

    Pat & Joan Looney, Co. Kerry

  • “We have the Oxyvent Tank for about ten years, before installing it we had radiators not heating all the way through, they were cold at the bottom throughout the house, even though they were cold we were burning quite a lot of oil, so we decided to have the Oxyvent Tank installed, the difference was amazing we had even heat throughout the house all of the radiators were heating and we were burning less oil, a saving of 30 to 35% I would say, so getting the Oxyvent Tank was a great idea still today 10 years later it is working as well as it did when it was first installed.”

    Sarah Stafford, Co. Kerry

We answer your questions

August 07, 2020

How often were you given the same suggestions to fix radiators in rooms that don’t heat: Check for air in the system, Fit a larger pump, Check the water pressure, Check if the radiator valves are stuck, etc etc

July 11, 2020

Where Underfloor Heating is installed with a gas or oil boiler, hot and cold patches on the floor are quite common. It can get very uncomfortable when the floor overheats. What can we do about it?

June 04, 2020

People normally place their hand on the top section of the radiator to find out if their heating is operating properly. This is not the correct way to find out if your radiators are functioning efficiently.