ᐅ Gas condensing boiler with an external solar storage tank or an integrated one
Created on: 27 Mar 2014 12:42
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hetjam9Hello,
Our construction meeting is scheduled for next week. We will be installing a gas condensing boiler (we can choose the manufacturer) along with a solar system on the roof for domestic hot water, including a 300-liter (79 gallons) storage tank.
We can also decide whether to have an external storage tank or a gas condensing boiler with an integrated storage tank, which is naturally smaller (I’m thinking between 150 and 200 liters [40 to 53 gallons]).
I would like to hear your opinions on this. In my view, the main advantage or disadvantage is the reduced space requirement. But what about maintenance if a component fails? Also, is 150 to 200 liters [40 to 53 gallons] sufficient for a household of four people?
Looking forward to your answers.
Our construction meeting is scheduled for next week. We will be installing a gas condensing boiler (we can choose the manufacturer) along with a solar system on the roof for domestic hot water, including a 300-liter (79 gallons) storage tank.
We can also decide whether to have an external storage tank or a gas condensing boiler with an integrated storage tank, which is naturally smaller (I’m thinking between 150 and 200 liters [40 to 53 gallons]).
I would like to hear your opinions on this. In my view, the main advantage or disadvantage is the reduced space requirement. But what about maintenance if a component fails? Also, is 150 to 200 liters [40 to 53 gallons] sufficient for a household of four people?
Looking forward to your answers.
Layperson's opinion: 150 liters (40 gallons) for 4 people is not enough, or you would need to be very disciplined when showering or bathing.
With solar support, larger storage tanks are usually beneficial because the heat is collected very selectively (at midday) but not used immediately. The remaining solar energy is then lost. However, if you heat 300 liters (80 gallons) to 75 degrees Celsius (167°F), it will retain the heat longer than just 150 liters (40 gallons). The problem is that if there is no sun, all 300 liters (80 gallons) have to be heated by the gas condensing boiler. A good plan can determine the optimal heating system based on your needs.
With solar support, larger storage tanks are usually beneficial because the heat is collected very selectively (at midday) but not used immediately. The remaining solar energy is then lost. However, if you heat 300 liters (80 gallons) to 75 degrees Celsius (167°F), it will retain the heat longer than just 150 liters (40 gallons). The problem is that if there is no sun, all 300 liters (80 gallons) have to be heated by the gas condensing boiler. A good plan can determine the optimal heating system based on your needs.
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kurbelfred28 Mar 2014 20:20We are getting a gas-solar system from Wolf with an integrated 310 l (82 gallons) tank. Wolf seems to be of good quality.
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kurbelfred31 Mar 2014 16:31I believe it does have a slight advantage due to the integrated storage. Unfortunately, I can’t answer exactly how at this point. Our heating system won’t be installed in the house for another 4-5 weeks.
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