ᐅ Heat pump or gas with a central ventilation system featuring heat recovery
Created on: 3 Apr 2019 14:33
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Llehsif
Hello everyone,
I am currently planning our new single-family home. I am interested in your experience regarding the choice of heating or an overall heating system concept.
A few key details:
Single-family house
2 stories with a gable roof
Approximately 160-170 sqm (1720-1830 sq ft)
KfW standard: Not planned yet
At first, I favored gas condensing technology combined with solar because air source heat pumps didn’t seem fully developed to me, and the units on the house didn’t look appealing.
In the meantime, a central ventilation system has come into play, which I now definitely want to consider. I was then advised that combining an air source heat pump with heat recovery ventilation would put me in a significantly better position.
What has been your experience? What would you recommend?
Additionally, there seems to be the option of using a combined unit (heat pump and ventilation). Does that make sense, or would it be better to install these two systems separately?
Which manufacturers do you prefer?
Thank you in advance for every response. If you need any more information, I will of course try to provide it.
Best regards,
Fabian
I am currently planning our new single-family home. I am interested in your experience regarding the choice of heating or an overall heating system concept.
A few key details:
Single-family house
2 stories with a gable roof
Approximately 160-170 sqm (1720-1830 sq ft)
KfW standard: Not planned yet
At first, I favored gas condensing technology combined with solar because air source heat pumps didn’t seem fully developed to me, and the units on the house didn’t look appealing.
In the meantime, a central ventilation system has come into play, which I now definitely want to consider. I was then advised that combining an air source heat pump with heat recovery ventilation would put me in a significantly better position.
What has been your experience? What would you recommend?
Additionally, there seems to be the option of using a combined unit (heat pump and ventilation). Does that make sense, or would it be better to install these two systems separately?
Which manufacturers do you prefer?
Thank you in advance for every response. If you need any more information, I will of course try to provide it.
Best regards,
Fabian
B
boxandroof5 Apr 2019 14:02Yes, it is possible, but not with every house and not with every energy consultant. The waste heat in the air is the renewable energy.
Try searching for it online; there are some users here and in other forums who have managed it.
Try searching for it online; there are some users here and in other forums who have managed it.
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wurmwichtel6 Apr 2019 14:11Mycraft schrieb:
...Because this results in ventilation losses...... which do not exceed 30% of the total heating demand. I would calculate everything and choose the most cost-effective option. In my opinion, gas heating combined with controlled mechanical ventilation is likely to be significantly more expensive than natural ventilation without extras.
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boxandroof6 Apr 2019 15:00Mechanical ventilation with heat recovery is not installed to save money. However, if it is planned, it can be used to avoid the need for a standby heater when using a gas heating system.
So, I have made some progress. I am interested in your opinions on two topics:
1. Gas boiler: Vaillant ecoTEC plus / Ventilation system: Multibreeze by Pedotherm and Vaillant Reco VAIR VAR 275
Vaillant is well-known and will likely provide good quality. Pedotherm is unfamiliar to me. Does anyone have experience with it?
2. Enthalpy heat exchanger:
You mentioned that I should definitely use one. However, I am not entirely clear on when it is useful for humidity recovery and what exact function it serves. Could someone explain this to me and share their opinion? The additional cost is expected to be 1,600 euros.
1. Gas boiler: Vaillant ecoTEC plus / Ventilation system: Multibreeze by Pedotherm and Vaillant Reco VAIR VAR 275
Vaillant is well-known and will likely provide good quality. Pedotherm is unfamiliar to me. Does anyone have experience with it?
2. Enthalpy heat exchanger:
You mentioned that I should definitely use one. However, I am not entirely clear on when it is useful for humidity recovery and what exact function it serves. Could someone explain this to me and share their opinion? The additional cost is expected to be 1,600 euros.
1. I believe Multibreeze is simply the term Pedotherm uses to describe the way they build the systems: "With the Multibreeze ventilation system from PEDOTHERM, your home receives controlled breathing. An air supply duct network installed in the floor continuously supplies your rooms with fresh outside air without drafts." The actual ventilation unit is from Vaillant. Pedotherm handles the underfloor heating and piping for the controlled ventilation for our general contractor. Everything worked out well with them.
2. The problem is that in winter, the indoor air can quickly become very dry (25%). Without the enthalpy heat exchanger, the moisture leaves the house directly. The heat exchanger recovers the moisture from the exhaust air and returns it to the incoming air. However, moisture must be generated inside the house through activities like hanging laundry, showering, etc. In our case, using the enthalpy heat exchanger improved humidity levels by about 10-15%, moving us out of the uncomfortable range. The unit cost €1600 for this device, which is a significant amount. The original one for our Tecalor heat pump was also supposed to cost €1500. We opted for a retrofit solution and paid €700. Judging by the pictures, it’s the same device, just rebranded by the controlled ventilation manufacturer at twice the price. The manufacturer seems to be Paul for all of them.
2. The problem is that in winter, the indoor air can quickly become very dry (25%). Without the enthalpy heat exchanger, the moisture leaves the house directly. The heat exchanger recovers the moisture from the exhaust air and returns it to the incoming air. However, moisture must be generated inside the house through activities like hanging laundry, showering, etc. In our case, using the enthalpy heat exchanger improved humidity levels by about 10-15%, moving us out of the uncomfortable range. The unit cost €1600 for this device, which is a significant amount. The original one for our Tecalor heat pump was also supposed to cost €1500. We opted for a retrofit solution and paid €700. Judging by the pictures, it’s the same device, just rebranded by the controlled ventilation manufacturer at twice the price. The manufacturer seems to be Paul for all of them.
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