ᐅ Request for review – Are the heating and ventilation systems correctly designed/installed?
Created on: 28 Aug 2013 10:36
C
Cassiodorus
Hello everyone,
Great forum here, I’ve already read quite a bit and gathered some information. However, I would appreciate it if someone could take a look at our overall setup to see if anything needs adjustment or if everything is okay as is.
For your information, we are building a three-family house with a ground-source heat pump, controlled mechanical ventilation, and underfloor heating.
Some details:
The living areas in the basement, ground floor, and upper floor combined (all three units) are approximately 340 sqm (3,660 sq ft).
The heat pump is a Viessmann Vitocal 300G with 10 kW. The plan is to install about 600 sqm (6,460 sq ft) of loops in the garden, consisting of 6 lines each 100 m (330 ft) long.
The hot water storage tank for the entire house has a capacity of 390 L (103 gallons), with a maximum supply temperature of 60°C (140°F).
The controlled mechanical ventilation system is a Helios EC 500 W.
We are building a solid structure to meet KfW 70 standard; I have the KfW heating calculation, but I only understand about half of it—so I’ll gladly share info from it if someone can explain it to me 🙂
My first question is whether this is properly sized: the heating system, ventilation system, and the amount of hot water storage?
The second question concerns the ventilation system’s supply air. Since the ground loops for the geothermal system still need to be installed and the garden dug up, I suggested laying a 100 m (330 ft) long sloped underground pipe at the same time to preheat or precool the air. It would be sloped to hopefully allow any condensate to drain away. The side connected to the house ends in a shaft (where the heating loops are also located, though I’m not sure why), so I could flush the pipe if necessary. According to the heating company, these 100 m provide about a 10 K (18°F) temperature adjustment.
I look forward to your answers and opinions... although we’re already plastering and the heating system will be installed soon, maybe there’s still time to make changes if we’re making a mistake.
Great forum here, I’ve already read quite a bit and gathered some information. However, I would appreciate it if someone could take a look at our overall setup to see if anything needs adjustment or if everything is okay as is.
For your information, we are building a three-family house with a ground-source heat pump, controlled mechanical ventilation, and underfloor heating.
Some details:
The living areas in the basement, ground floor, and upper floor combined (all three units) are approximately 340 sqm (3,660 sq ft).
The heat pump is a Viessmann Vitocal 300G with 10 kW. The plan is to install about 600 sqm (6,460 sq ft) of loops in the garden, consisting of 6 lines each 100 m (330 ft) long.
The hot water storage tank for the entire house has a capacity of 390 L (103 gallons), with a maximum supply temperature of 60°C (140°F).
The controlled mechanical ventilation system is a Helios EC 500 W.
We are building a solid structure to meet KfW 70 standard; I have the KfW heating calculation, but I only understand about half of it—so I’ll gladly share info from it if someone can explain it to me 🙂
My first question is whether this is properly sized: the heating system, ventilation system, and the amount of hot water storage?
The second question concerns the ventilation system’s supply air. Since the ground loops for the geothermal system still need to be installed and the garden dug up, I suggested laying a 100 m (330 ft) long sloped underground pipe at the same time to preheat or precool the air. It would be sloped to hopefully allow any condensate to drain away. The side connected to the house ends in a shaft (where the heating loops are also located, though I’m not sure why), so I could flush the pipe if necessary. According to the heating company, these 100 m provide about a 10 K (18°F) temperature adjustment.
I look forward to your answers and opinions... although we’re already plastering and the heating system will be installed soon, maybe there’s still time to make changes if we’re making a mistake.
C
Cassiodorus10 Sep 2013 13:29Oh, by the way... they said that the heat pump will now have 12 kW.