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mark tm-115 Feb 2011 15:01Hello!
Six years ago, we bought a semi-detached house with a water-to-water heat pump. Until now, we have been very satisfied with its heating performance and the energy provider’s costs.
It’s unfortunate that our heating system has now broken down. We haven’t been able to determine the exact cause yet. The experts’ suspicion is that we have such heavy sand deposits in the groundwater, the filter in front of the heat pump wasn’t cleaned often enough, and that the materials used six years ago were simply not durable enough to withstand the impact of fine sand passing through. The heat pump we have now chosen together with our neighbor is equipped with stainless steel, and we are having our groundwater tested for changes. We will also clean the filter more frequently, regardless of the maintenance contract.
Despite all this trouble, I am convinced of this type of heating system. On an annual basis, it is economical (about 400 euros per year in heating costs for 140 m² (1,507 sq ft)) and more environmentally friendly. Of course, I can’t say exactly from which energy source my electricity is coming now, but... smoke only ever comes out of my chimney occasionally, when I heat with Danish wood.
And even if you pass your home on to a foundation, you will have a great heating system for the next 30 years and have also done something good for the environment.
Best regards,
mark tm-1
Six years ago, we bought a semi-detached house with a water-to-water heat pump. Until now, we have been very satisfied with its heating performance and the energy provider’s costs.
It’s unfortunate that our heating system has now broken down. We haven’t been able to determine the exact cause yet. The experts’ suspicion is that we have such heavy sand deposits in the groundwater, the filter in front of the heat pump wasn’t cleaned often enough, and that the materials used six years ago were simply not durable enough to withstand the impact of fine sand passing through. The heat pump we have now chosen together with our neighbor is equipped with stainless steel, and we are having our groundwater tested for changes. We will also clean the filter more frequently, regardless of the maintenance contract.
Despite all this trouble, I am convinced of this type of heating system. On an annual basis, it is economical (about 400 euros per year in heating costs for 140 m² (1,507 sq ft)) and more environmentally friendly. Of course, I can’t say exactly from which energy source my electricity is coming now, but... smoke only ever comes out of my chimney occasionally, when I heat with Danish wood.
And even if you pass your home on to a foundation, you will have a great heating system for the next 30 years and have also done something good for the environment.
Best regards,
mark tm-1
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MODERATOR19 Feb 2011 15:37Hello everyone,
With heat pumps, regardless of the medium transferring the heat, it is very important to have the system regularly serviced and adjusted by a professional. I generally recommend having an evaluation carried out in advance by a heating engineer to optimize the coefficient of performance (COP), although an air-to-water heat pump can hardly achieve the ideal annual performance factor of 4.
Air-source heat pumps generally have low efficiency at very low outdoor temperatures. In these cases, optimized settings won’t help much; the supply temperature needs to be increased – this is something Wali has experienced.
I advise Wali to have an economic feasibility analysis done together with a heating assessment by an engineer.
With heat pumps, regardless of the medium transferring the heat, it is very important to have the system regularly serviced and adjusted by a professional. I generally recommend having an evaluation carried out in advance by a heating engineer to optimize the coefficient of performance (COP), although an air-to-water heat pump can hardly achieve the ideal annual performance factor of 4.
Air-source heat pumps generally have low efficiency at very low outdoor temperatures. In these cases, optimized settings won’t help much; the supply temperature needs to be increased – this is something Wali has experienced.
I advise Wali to have an economic feasibility analysis done together with a heating assessment by an engineer.
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