ᐅ New Construction + Exhaust Air Heat Pump According to Provider, Is a Trench Collector Affordable?
Created on: 13 Mar 2016 16:19
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exposeHello,
I am currently working on a new construction project that is approaching the final stages, except for the heating system. Originally, a gas boiler with solar support for domestic hot water was planned. This would make the house comply with the KfW 70 energy standard. It is a bungalow with 125 m² (1345 sq ft) of living space (4 rooms, kitchen integrated into the living area, bathroom, toilet, utility room) on an 835 m² (8980 sq ft) plot.
The builder has now proposed an exhaust air heat pump with decentralized ventilation. The additional costs, including extra insulation of the floor slab to meet the KfW 55 standard, are around 6,000–7,000 euros. In principle, I like the idea of being independent from fossil fuels, but after looking closely at such a heating system, I am not completely convinced by the concept. Especially the ventilation seemed questionable to me, as there was a noticeable cold draft and the rooms felt somewhat stuffy overall.
The builder himself has no experience with these heat pumps yet but plans to install several in the future.
During my research on exhaust air heat pumps, I also came across heat pump technology with ground loop collectors and find this concept much more interesting.
The fact is, the extra cost compared to the gas boiler, about 6,000–7,000 euros, represents the upper limit of my budget. It must not get more expensive.
I am a bit unsure about how to proceed. How can I determine whether a ground loop collector would be suitable, and whether it would fit my budget? Are there possibly other heat pumps with external units that might be an option? Or could my concerns about the exhaust air heat pump be unfounded?
Thank you in advance.
I am currently working on a new construction project that is approaching the final stages, except for the heating system. Originally, a gas boiler with solar support for domestic hot water was planned. This would make the house comply with the KfW 70 energy standard. It is a bungalow with 125 m² (1345 sq ft) of living space (4 rooms, kitchen integrated into the living area, bathroom, toilet, utility room) on an 835 m² (8980 sq ft) plot.
The builder has now proposed an exhaust air heat pump with decentralized ventilation. The additional costs, including extra insulation of the floor slab to meet the KfW 55 standard, are around 6,000–7,000 euros. In principle, I like the idea of being independent from fossil fuels, but after looking closely at such a heating system, I am not completely convinced by the concept. Especially the ventilation seemed questionable to me, as there was a noticeable cold draft and the rooms felt somewhat stuffy overall.
The builder himself has no experience with these heat pumps yet but plans to install several in the future.
During my research on exhaust air heat pumps, I also came across heat pump technology with ground loop collectors and find this concept much more interesting.
The fact is, the extra cost compared to the gas boiler, about 6,000–7,000 euros, represents the upper limit of my budget. It must not get more expensive.
I am a bit unsure about how to proceed. How can I determine whether a ground loop collector would be suitable, and whether it would fit my budget? Are there possibly other heat pumps with external units that might be an option? Or could my concerns about the exhaust air heat pump be unfounded?
Thank you in advance.
Trench collector as a natural alternative to the exhaust air heat pump. The question is whether this option can be implemented without significant additional costs.
Also, I am usually only at home in the evenings and will initially live alone in the house. From this perspective, I am not particularly fond of the exhaust air heat pump concept, since it essentially relies on the energy from people, appliances, etc.
Also, I am usually only at home in the evenings and will initially live alone in the house. From this perspective, I am not particularly fond of the exhaust air heat pump concept, since it essentially relies on the energy from people, appliances, etc.
expose schrieb:
Trench collector is of course an alternative to the exhaust air pump. The question is whether this option can be implemented without significant additional costs.If you carry out the trench work yourself, it usually is. You save on gas connection, heat storage tank, and gas boiler. Instead, you need a brine heat pump plus materials for the collector, and if you have a good builder, you can receive a subsidy of EUR 4,000 from BAFA for the brine heat pump as an innovation grant for new builds.
However, you need to thoroughly research this and have the right partner—such as a general contractor/ construction manager/ architect or similar—as well as a builder. I would definitely not consider this option with a property developer!
Since my contractor has not installed such heating systems before, it is naturally challenging. Therefore, I am now trying to gather some information myself. Besides gas, only a heat pump with an outdoor unit or possibly a ground collector is an option. Everything else is beyond the budget.
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