ᐅ Air-to-air heat pump vs. air-to-water heat pump vs. trench ground collector – Differences
Created on: 12 Dec 2019 10:33
N
Neubau2020
Hello,
I am currently trying to decide how the heating energy should be generated.
Here in the forum, I came across the horizontal ground loop collector, which I find very interesting. In conversations with two prefabricated house suppliers, I mentioned that I am considering generating energy with a horizontal ground loop collector. Both times, the response was, "We’ve heard of horizontal ground loop collectors, but never installed one."
One offer included an air-to-water heat pump (Luxhaus KfW55), and the other included an air-to-air heat pump with controlled residential ventilation (Streif Haus KfW40). The house will have two levels, no basement, around 190 m² (2,045 sq ft), on a fairly flat plot with no special features.
I am wondering how the horizontal ground loop collector differs technically and in price from the air-to-water heat pump.
Is the technology inside the house the same, or are there other factors to consider, such as system size and design?
Is the main difference simply that instead of the external unit of the air heat pump, I install the trench and lay the pipes?
What is the price difference?
What about the long-term difference in energy consumption? The air heat pump needs to run continuously on electricity to draw in air—how does it work with geothermal energy from the horizontal ground loop in this regard?
Lastly, a question regarding the air-to-air heat pump:
The sales representative from Streif Haus said that if I wanted to switch from the air-to-air heat pump to an air-to-water heat pump, it would cost about 10,000 euros more. Is that a realistic estimate?
I am currently trying to decide how the heating energy should be generated.
Here in the forum, I came across the horizontal ground loop collector, which I find very interesting. In conversations with two prefabricated house suppliers, I mentioned that I am considering generating energy with a horizontal ground loop collector. Both times, the response was, "We’ve heard of horizontal ground loop collectors, but never installed one."
One offer included an air-to-water heat pump (Luxhaus KfW55), and the other included an air-to-air heat pump with controlled residential ventilation (Streif Haus KfW40). The house will have two levels, no basement, around 190 m² (2,045 sq ft), on a fairly flat plot with no special features.
I am wondering how the horizontal ground loop collector differs technically and in price from the air-to-water heat pump.
Is the technology inside the house the same, or are there other factors to consider, such as system size and design?
Is the main difference simply that instead of the external unit of the air heat pump, I install the trench and lay the pipes?
What is the price difference?
What about the long-term difference in energy consumption? The air heat pump needs to run continuously on electricity to draw in air—how does it work with geothermal energy from the horizontal ground loop in this regard?
Lastly, a question regarding the air-to-air heat pump:
The sales representative from Streif Haus said that if I wanted to switch from the air-to-air heat pump to an air-to-water heat pump, it would cost about 10,000 euros more. Is that a realistic estimate?
T
T_im_Norden8 Jun 2020 08:46A towel warmer, as the name suggests, is a warmer but not a radiator.
For the bathroom, either plan for underfloor heating or an infrared mirror. Both will ensure you have enough warmth in the bathroom.
With a properly designed underfloor heating system, you won’t need additional heaters in the other rooms.
A fireplace is mainly for aesthetics and can be counterproductive because it requires a chimney and, consequently, chimney sweeping, as well as a separate control circuit for the mechanical ventilation system.
Additionally, a fireplace can quickly overheat the house in modern construction.
For the bathroom, either plan for underfloor heating or an infrared mirror. Both will ensure you have enough warmth in the bathroom.
With a properly designed underfloor heating system, you won’t need additional heaters in the other rooms.
A fireplace is mainly for aesthetics and can be counterproductive because it requires a chimney and, consequently, chimney sweeping, as well as a separate control circuit for the mechanical ventilation system.
Additionally, a fireplace can quickly overheat the house in modern construction.
T_im_Norden schrieb:
With a properly designed underfloor heating system, you don’t need additional heaters in the other rooms. You don’t know my wife very well—if she’s cold, she’s cold, even if the room temperature stays constant at 21°C (70°F). That’s why temporary and localized supplementary heating in the living areas and bathrooms is essential.
T_im_Norden schrieb:
A fireplace would be just for aesthetics and rather counterproductive, since you’d need a chimney and then a chimney sweep, plus a separate control for the mechanical ventilation system.
Additionally, a fireplace can quickly overheat the house in modern buildings. We will definitely install a panoramic fireplace in the living area.
But there are heating systems or mechanical ventilation setups that can transfer the excess heat from a fireplace to other rooms, making good use of it, aren’t there?
DaSch17 schrieb:
But there are heating systems or controlled residential ventilation systems where the excess heat from a fireplace is transported to other rooms and used efficiently, right?You can connect the fireplace to the underfloor heating system, but it won't pay off even after heating for 100 years. If there is space, warm air can be ducted to the upper floor... but is it really worth it?
So far, we manage well in the bathroom without any additional heating in the apartment.
Currently, when we shower the next morning, we increase the underfloor heating slightly the evening before to make it a bit warmer. In the morning, we turn it back down again. (Only a manual wall thermostat)
If you shower every day instead of every other day, it would make sense to keep the bathroom temperature permanently at 23°C (73°F), since constantly turning the heating up and down wouldn’t be efficient due to the system’s slow response time.
I would also assume that the extra cost of keeping the bathroom a little warmer continuously is not significant.
An infrared supplemental heater integrated into a large mirror would be a great option. You’d then have both a nice large mirror and the ability to quickly raise the temperature temporarily for showering. However, I don’t think it’s absolutely necessary. It’s mostly a question of budget and how much you want to invest.
Currently, when we shower the next morning, we increase the underfloor heating slightly the evening before to make it a bit warmer. In the morning, we turn it back down again. (Only a manual wall thermostat)
If you shower every day instead of every other day, it would make sense to keep the bathroom temperature permanently at 23°C (73°F), since constantly turning the heating up and down wouldn’t be efficient due to the system’s slow response time.
I would also assume that the extra cost of keeping the bathroom a little warmer continuously is not significant.
An infrared supplemental heater integrated into a large mirror would be a great option. You’d then have both a nice large mirror and the ability to quickly raise the temperature temporarily for showering. However, I don’t think it’s absolutely necessary. It’s mostly a question of budget and how much you want to invest.
DaSch17 schrieb:
You don’t know my wife well if you think she’s not cold just because the room temperature is constantly 21°C (70°F). That’s why temporarily and locally heating the living areas and bathrooms is mandatory. None of the three options allow for that. Air-to-water and ground-source heat pumps are too slow to respond due to the inertia of the underfloor heating, and with an air heat pump, you can’t just quickly turn up a heater like a hairdryer.
I haven’t followed everything closely, but if you currently live in an older house, you can’t really compare. The feeling in a modern new build is completely different. If you are still worried about it, you need to use supplementary heating. Infrared heating is one option. However, with an infrared mirror, keep in mind that some women who apply makeup in front of the bathroom mirror don’t find that very comfortable.
DaSch17 schrieb:
But there are heating systems or controlled ventilation systems where the excess heat from a fireplace is distributed to other rooms and thus used efficiently, right? Yes, they exist, but they are completely uneconomical. A lot of investment that you won’t remotely recover.
Similar topics