ᐅ Which type of gas boiler is best suited for a new build?
Created on: 27 Jun 2018 07:14
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schmidt1904S
schmidt190427 Jun 2018 07:14Hello,
we are planning to build a single-family house according to the energy-saving regulations, 140 m² (1,507 sq ft) without a basement.
We have chosen a gas boiler with solar support and underfloor heating.
The builder installs Viessmann or Buderus.
Is it worth investing the extra cost for the "higher-end" boilers (Vitodens 300 / GB192i)?
These, among other features, offer better modulation and automatic combustion control
compared to the basic models (Vitodens 200 / GB172).
Best regards
we are planning to build a single-family house according to the energy-saving regulations, 140 m² (1,507 sq ft) without a basement.
We have chosen a gas boiler with solar support and underfloor heating.
The builder installs Viessmann or Buderus.
Is it worth investing the extra cost for the "higher-end" boilers (Vitodens 300 / GB192i)?
These, among other features, offer better modulation and automatic combustion control
compared to the basic models (Vitodens 200 / GB172).
Best regards
We will have the Buderus GB 172 installed. I also asked the heating company about the 192i model; the additional cost was 500€ net, so nothing dramatic. However, they said the 172 does exactly the same as the 192, and the 192i just looks a bit nicer because of the glass and the integrated Wi-Fi module. We preferred to spend the money on the pipe system instead of flat plate collectors and on a larger domestic hot water storage system.
S
schmidt190427 Jun 2018 09:22@Nutshell
Did you choose the Vitodens300 over the Vitodens200 because of the technical specifications (modulation, etc.)?
What is your annual consumption, and what size is your house?
Did you choose the Vitodens300 over the Vitodens200 because of the technical specifications (modulation, etc.)?
What is your annual consumption, and what size is your house?
@schmidt1904
We chose this heating system because
1. It was the top-rated product in a Stiftung Warentest test
2. It comes from Thuringia (regional approach)
3. It didn’t add any extra cost beyond the fixed price. Of course, the heating installer/site manager was surprised when I insisted on it, but in the end, we got it—just at the expense of their margin.
Size: 111 m² (1,195 sq ft) living space.
KfW Standard: 55
Exterior wall: 36.5 cm (14 inches) Ytong // Lambda 0.2 W/m²K
Ground slab insulated with XPS // 0.21 W/m²K
Sloped ceiling on the upper floor insulated with 24 cm (9.5 inches) // ceiling with 34 cm (13.5 inches) mineral wool // 0.12 W/m²K
Door and windows are triple-glazed and gas-filled // overall including frame 1.05 W/m²K
Heat generator:
Gas condensing boiler: Viessmann Vitodens 300
System control: Vitotronic 200
Solar panels 5 m² (54 sq ft): Vitosol 200-F
Solar storage tank: Vitocell 100-W 300 liters (79 gallons)
Underfloor heating
The solar system is only used for domestic hot water (no heating support).
Our gas boiler is switched off for heating from May to September and consumes about 100 kWh over the summer.
In winter, the solar system rarely heats the water hot enough (2 people), so it mostly runs on gas.
Ventilation is handled by decentralized Lunos e² units with 90% heat recovery.
Annual gas consumption is approximately 7,600–8,100 kWh for heating and hot water.
That translates to monthly heating costs of €28–33 (currently back down to €28; last winter was apparently not very cold).
We maintain 23°C (73°F) throughout the house (24–25°C / 75–77°F in the bathroom), with no nighttime temperature reduction. Ventilation is always on, and we no longer air the whole house daily (construction moisture has long since disappeared).
We chose this heating system because
1. It was the top-rated product in a Stiftung Warentest test
2. It comes from Thuringia (regional approach)
3. It didn’t add any extra cost beyond the fixed price. Of course, the heating installer/site manager was surprised when I insisted on it, but in the end, we got it—just at the expense of their margin.
Size: 111 m² (1,195 sq ft) living space.
KfW Standard: 55
Exterior wall: 36.5 cm (14 inches) Ytong // Lambda 0.2 W/m²K
Ground slab insulated with XPS // 0.21 W/m²K
Sloped ceiling on the upper floor insulated with 24 cm (9.5 inches) // ceiling with 34 cm (13.5 inches) mineral wool // 0.12 W/m²K
Door and windows are triple-glazed and gas-filled // overall including frame 1.05 W/m²K
Heat generator:
Gas condensing boiler: Viessmann Vitodens 300
System control: Vitotronic 200
Solar panels 5 m² (54 sq ft): Vitosol 200-F
Solar storage tank: Vitocell 100-W 300 liters (79 gallons)
Underfloor heating
The solar system is only used for domestic hot water (no heating support).
Our gas boiler is switched off for heating from May to September and consumes about 100 kWh over the summer.
In winter, the solar system rarely heats the water hot enough (2 people), so it mostly runs on gas.
Ventilation is handled by decentralized Lunos e² units with 90% heat recovery.
Annual gas consumption is approximately 7,600–8,100 kWh for heating and hot water.
That translates to monthly heating costs of €28–33 (currently back down to €28; last winter was apparently not very cold).
We maintain 23°C (73°F) throughout the house (24–25°C / 75–77°F in the bathroom), with no nighttime temperature reduction. Ventilation is always on, and we no longer air the whole house daily (construction moisture has long since disappeared).
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