ᐅ Gas Heating + Solar & Controlled Ventilation or Air-to-Water Heat Pump Energy Saving Regulation 2016
Created on: 21 Apr 2018 11:26
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Filstal
Hello everyone,
Since I am quite new here, I would like to provide some background information about my situation. Please excuse any gaps in my knowledge in advance, and I am happy to provide further details if needed.
I own a fairly flat plot of land with 400 sqm (4,305 sq ft) (gas connection available), on which a KfW 70 energy-efficient solid brick single-family house with a slab foundation (no basement) is planned. The house will have approximately 134 sqm (1,442 sq ft) of living space and 144 sqm (1,550 sq ft) of total floor area, spread over 1.5 stories. It will have a gable roof with a 30° pitch and a knee wall height of 1.50 m (4.9 ft). Due to a nearby railway line, increased sound insulation is required, so the exterior walls must be constructed with a thickness of 36.5 cm (14.4 inches).
The build will be carried out by a local general contractor who has provided me with two offers as follows:
Offer 1: Thermo solid masonry blocks S9, 36.5 cm (14.4 inches) thick, enhanced insulation in the roof/attic, a gas condensing wall boiler type Viessmann VITODENS 200-W with a 500-liter (132-gallon) storage tank, and Viessmann VITOSOL 200-F flat plate solar collectors. Controlled ventilation with heat recovery is provided by four decentralized ventilation units, along with standard compact radiators throughout the house. Airtightness testing will be performed using a blower door test. This build will comply with the Energy Saving Ordinance 2014 including the 2016 tightening.
Offer 2: Thermo solid masonry blocks SX 10, 36.5 cm (14.4 inches) thick, Bartl air-to-water compact heat pump ECO 3-6 LCI for indoor installation with an 800-liter (211-gallon) storage tank. Underfloor heating throughout the entire house. Vento ventilation systems installed at all windows and patio doors in living areas. Prepared for a future photovoltaic system installation. This build will comply with the Energy Saving Ordinance 2016.
In terms of price, the second offer is exactly €3,000 more expensive, which is offset by the gas connection cost required for the first offer.
Since I am quite uncertain about which heating system would be the, let’s say carefully, "better" option for this house and more economical in the long run, I would like to ask for your recommendations here. My secondary question is whether the compact heat pump makes sense or if a split system from the same manufacturer would be a better choice?
I do not want to start a general debate about whether gas or air-to-water heat pumps are better and am specifically focusing only on the air-to-water heat pump.
My general contractor is clearly leaning towards the air-to-water heat pump. Here is a link to the technical data of the air-to-water heat pump.
Best regards,
Filstal
Since I am quite new here, I would like to provide some background information about my situation. Please excuse any gaps in my knowledge in advance, and I am happy to provide further details if needed.
I own a fairly flat plot of land with 400 sqm (4,305 sq ft) (gas connection available), on which a KfW 70 energy-efficient solid brick single-family house with a slab foundation (no basement) is planned. The house will have approximately 134 sqm (1,442 sq ft) of living space and 144 sqm (1,550 sq ft) of total floor area, spread over 1.5 stories. It will have a gable roof with a 30° pitch and a knee wall height of 1.50 m (4.9 ft). Due to a nearby railway line, increased sound insulation is required, so the exterior walls must be constructed with a thickness of 36.5 cm (14.4 inches).
The build will be carried out by a local general contractor who has provided me with two offers as follows:
Offer 1: Thermo solid masonry blocks S9, 36.5 cm (14.4 inches) thick, enhanced insulation in the roof/attic, a gas condensing wall boiler type Viessmann VITODENS 200-W with a 500-liter (132-gallon) storage tank, and Viessmann VITOSOL 200-F flat plate solar collectors. Controlled ventilation with heat recovery is provided by four decentralized ventilation units, along with standard compact radiators throughout the house. Airtightness testing will be performed using a blower door test. This build will comply with the Energy Saving Ordinance 2014 including the 2016 tightening.
Offer 2: Thermo solid masonry blocks SX 10, 36.5 cm (14.4 inches) thick, Bartl air-to-water compact heat pump ECO 3-6 LCI for indoor installation with an 800-liter (211-gallon) storage tank. Underfloor heating throughout the entire house. Vento ventilation systems installed at all windows and patio doors in living areas. Prepared for a future photovoltaic system installation. This build will comply with the Energy Saving Ordinance 2016.
In terms of price, the second offer is exactly €3,000 more expensive, which is offset by the gas connection cost required for the first offer.
Since I am quite uncertain about which heating system would be the, let’s say carefully, "better" option for this house and more economical in the long run, I would like to ask for your recommendations here. My secondary question is whether the compact heat pump makes sense or if a split system from the same manufacturer would be a better choice?
I do not want to start a general debate about whether gas or air-to-water heat pumps are better and am specifically focusing only on the air-to-water heat pump.
My general contractor is clearly leaning towards the air-to-water heat pump. Here is a link to the technical data of the air-to-water heat pump.
Best regards,
Filstal
Hi @11ant, I get your point, but I’m not entirely sure how it relates to my post. I have no problem with gas; it just didn’t work effectively for me. It’s already been mentioned that heat pumps aren’t rocket science. When properly designed and installed, they are a reliable heat source, as shown by that database. And I’m not convinced that fossil fuels are the ultimate solution—so please don’t start with biogas [emoji6]
ruppsn schrieb:
Properly designed and installed, they are a reasonable heat source, as the mentioned database shows. And whether fossil fuels are really the ultimate solution, I’m not so sure—so please don’t start with biogas now No, I am not an advocate for manure gas heating systems, nor do I have any personal stake in any heating technology. If you have found one that delivers more than just promotional projections for its cost-effectiveness in real-world use by average homeowners, that’s good. You often read in forums or homebuilding magazines about miracle solutions and disappointed users (whose real experiences didn’t match lab performance figures—for example, because “disturbing factors” were underestimated). Therefore, my advice is: choose what you know yourself—even if something else might theoretically be even more optimal. I am certainly not suggesting a return to open fires.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
What you know firsthand. So, only a fireplace. And even with that, people tend to use it "incorrectly." Almost no one understands optimal condensing boiler operation. Flow temperature set to 60°C (140°F) when the outside temperature is 5°C (41°F). Quickly turning the thermostat and expecting the room to warm up within half an hour.
If the radiator isn't glowing, something is wrong.
The disruptive factor is users who refuse to learn, nothing else. We are living in the year 2018, and people care more about a $1000 smartphone than a $10,000 heating system and how it operates.
The shape of the toilet is more interesting than one of the essential factors in utility costs. It just needs to get warm. How is irrelevant. Saving 15% per year? I don't care as long as I get a discount on the next car...
The energy transition has failed. People simply aren't interested. As a result, neither is politics.
If the radiator isn't glowing, something is wrong.
The disruptive factor is users who refuse to learn, nothing else. We are living in the year 2018, and people care more about a $1000 smartphone than a $10,000 heating system and how it operates.
The shape of the toilet is more interesting than one of the essential factors in utility costs. It just needs to get warm. How is irrelevant. Saving 15% per year? I don't care as long as I get a discount on the next car...
The energy transition has failed. People simply aren't interested. As a result, neither is politics.