ᐅ New Construction + Exhaust Air Heat Pump According to Provider, Is a Trench Collector Affordable?
Created on: 13 Mar 2016 16:19
E
expose
Hello,
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.
S
Sebastian7924 Mar 2016 15:08What is often overlooked is the type of frequencies involved – people perceive low frequencies as much more disturbing than higher ones.
I also know of a rather expensive Vaillant system that is noisy. Why is it noisy? Simply put: poor planning, improper settings, and installation at a location that was good at the start of construction. Later, a garage was built next to it, creating a kind of "courtyard" that reflects the sound.
I wouldn’t say this issue is limited to budget systems. While that is certainly an important factor—and applies in many cases, since many people want to save money—it is not the whole story.
I also know of a rather expensive Vaillant system that is noisy. Why is it noisy? Simply put: poor planning, improper settings, and installation at a location that was good at the start of construction. Later, a garage was built next to it, creating a kind of "courtyard" that reflects the sound.
I wouldn’t say this issue is limited to budget systems. While that is certainly an important factor—and applies in many cases, since many people want to save money—it is not the whole story.
Hi,
The question is: what do you want?
If you simply want the cheapest heating system without any hassle and don’t care about any KFW 55 standard: then gas heating might be right for you. It also depends on whether the building permit / planning permission was submitted last year or this year. The regulations for calculating energy factors have changed, which on paper worsens gas boilers and improves heat pumps.
If you want to show off your green credentials and money is no object: then ground source heat pump.
The running costs for your house with a gas boiler will be around €50 (about $55) per month. Whether another system uses 20% more or less doesn’t really matter; we are then talking about plus or minus €10 (about $11) per month.
Best regards,
Andreas
expose schrieb:
Not that in the end the gas heating might be the better solution.
The question is: what do you want?
If you simply want the cheapest heating system without any hassle and don’t care about any KFW 55 standard: then gas heating might be right for you. It also depends on whether the building permit / planning permission was submitted last year or this year. The regulations for calculating energy factors have changed, which on paper worsens gas boilers and improves heat pumps.
If you want to show off your green credentials and money is no object: then ground source heat pump.
The running costs for your house with a gas boiler will be around €50 (about $55) per month. Whether another system uses 20% more or less doesn’t really matter; we are then talking about plus or minus €10 (about $11) per month.
Best regards,
Andreas
I am also considering which heating option to choose...
We need to make a decision now.
I have 200 square meters (2,150 square feet) of living space plus 50 square meters (540 square feet) of hallway and 100 square meters (1,075 square feet) of heated basement area.
So a total of 350 square meters (3,765 square feet).
From the beginning, I was set on an air-to-water heat pump, but the more I read, the more uncertain I become.
The downside of an air-to-water heat pump is that on cold days or in winter, it can consume a lot of electricity.
At the moment, I am leaning more and more toward gas, possibly combined with solar thermal.
What would you recommend?
Currently, there are 2 adults and 2 children. One more child might be added.
We need to make a decision now.
I have 200 square meters (2,150 square feet) of living space plus 50 square meters (540 square feet) of hallway and 100 square meters (1,075 square feet) of heated basement area.
So a total of 350 square meters (3,765 square feet).
From the beginning, I was set on an air-to-water heat pump, but the more I read, the more uncertain I become.
The downside of an air-to-water heat pump is that on cold days or in winter, it can consume a lot of electricity.
At the moment, I am leaning more and more toward gas, possibly combined with solar thermal.
What would you recommend?
Currently, there are 2 adults and 2 children. One more child might be added.
andimann schrieb:
Hi,
The question is: what do you want?
If you want to have that green façade and money is no object: then a ground source heat pump.
AndreasAfter deducting subsidies, the costs for gas/solar and surface collectors plus heat pump are roughly in the same price range. What’s on paper afterwards doesn’t really matter to me.
B
Bauexperte24 Mar 2016 15:34andimann schrieb:
But the hearing aid battery must be dead for that... SCNRNo problem Myself, I always say that I wouldn’t even hear fireworks right next to my bed. That’s true if it fits the pattern I have stored in my mind. But if my granddaughter makes a quiet, unusual noise, I’m instantly wide awake in bed.
In that sense, I wouldn’t hear the fan after 2 days at the latest.
Best regards, Bauexperte
Bauexperte
Hello,
there is a new residential development near us, and many families have installed air-to-water heat pumps. The humming or noise from the units would definitely bother me. When walking through the streets, you can hear the devices everywhere. Standing right in front of one, it sounds almost like being near a busy road. I don’t find these systems practical in areas where the plots are hardly larger than 400 m² (approximately 4,300 sq ft). This makes it impossible to avoid disturbing neighbors with the noise. I find this constant humming even worse than occasional passing vehicles.
Best regards,
Sabine
there is a new residential development near us, and many families have installed air-to-water heat pumps. The humming or noise from the units would definitely bother me. When walking through the streets, you can hear the devices everywhere. Standing right in front of one, it sounds almost like being near a busy road. I don’t find these systems practical in areas where the plots are hardly larger than 400 m² (approximately 4,300 sq ft). This makes it impossible to avoid disturbing neighbors with the noise. I find this constant humming even worse than occasional passing vehicles.
Best regards,
Sabine
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