Hi everyone,
we are building a small solid house with a general contractor. Originally, the plan was to have a gas boiler with a controlled ventilation system.
Now that we finally have an installer assigned, he told us there is no space for controlled ventilation!
This is quite short notice since the excavator is already on site, and digging for the foundation will probably start on Monday.
The general contractor has presented us with the following options:
Option 1:
- Gas condensing boiler with solar thermal system
(Photovoltaic system does not make sense here!)
Requirements:
o Flue pipe (either on the exterior wall or in the cloakroom niche)
o Buffer tank
o Expansion vessel
o Condensing boiler
o Piping for solar system up to the roof
Requires a lot of space
Option 2:
- Gas condensing boiler with ventilation (just sufficient for energy saving regulation calculations)
(Photovoltaic system does not make sense here!)
Requirements:
o Flue pipe (either on the exterior wall or in the cloakroom niche)
o Buffer tank
o Expansion vessel
o Condensing boiler
o Ventilation system (ceiling-mounted)
Basically no space available
Option 3:
- Air-to-water heat pump with ventilation
(Photovoltaic system can be added later – empty conduit to the roof)
Requirements:
o Buffer tank
o Expansion vessel
o Outdoor unit for air-to-water heat pump
o Ventilation system (ceiling-mounted)
o 10cm (4 inches) build-up in the sloped roof area needed for ventilation ducts
Option 4:
- Air-to-water heat pump without ventilation
(Energy saving regulation compliance is technically not a problem, but mechanical ventilation should possibly be ensured by e.g. window frame ventilation)
(Photovoltaic system can be added later – empty conduit to the roof)
Requirements:
o Buffer tank
o Expansion vessel
o Outdoor unit for air-to-water heat pump
Unfortunately, the additional costs for these options have not been communicated to us.
We are currently leaning towards option 4, but we are quite uncertain about these window frame ventilation solutions...
Have a nice Sunday
Marvin
we are building a small solid house with a general contractor. Originally, the plan was to have a gas boiler with a controlled ventilation system.
Now that we finally have an installer assigned, he told us there is no space for controlled ventilation!
This is quite short notice since the excavator is already on site, and digging for the foundation will probably start on Monday.
The general contractor has presented us with the following options:
Option 1:
- Gas condensing boiler with solar thermal system
(Photovoltaic system does not make sense here!)
Requirements:
o Flue pipe (either on the exterior wall or in the cloakroom niche)
o Buffer tank
o Expansion vessel
o Condensing boiler
o Piping for solar system up to the roof
Requires a lot of space
Option 2:
- Gas condensing boiler with ventilation (just sufficient for energy saving regulation calculations)
(Photovoltaic system does not make sense here!)
Requirements:
o Flue pipe (either on the exterior wall or in the cloakroom niche)
o Buffer tank
o Expansion vessel
o Condensing boiler
o Ventilation system (ceiling-mounted)
Basically no space available
Option 3:
- Air-to-water heat pump with ventilation
(Photovoltaic system can be added later – empty conduit to the roof)
Requirements:
o Buffer tank
o Expansion vessel
o Outdoor unit for air-to-water heat pump
o Ventilation system (ceiling-mounted)
o 10cm (4 inches) build-up in the sloped roof area needed for ventilation ducts
Option 4:
- Air-to-water heat pump without ventilation
(Energy saving regulation compliance is technically not a problem, but mechanical ventilation should possibly be ensured by e.g. window frame ventilation)
(Photovoltaic system can be added later – empty conduit to the roof)
Requirements:
o Buffer tank
o Expansion vessel
o Outdoor unit for air-to-water heat pump
Unfortunately, the additional costs for these options have not been communicated to us.
We are currently leaning towards option 4, but we are quite uncertain about these window frame ventilation solutions...
Have a nice Sunday
Marvin
See profile picture. It’s a bungalow. One Helios unit is sufficient. For a second floor, you would also need one upstairs.
Tilt-and-turn vents are installed in all windows, not in the doors. The system is RegelAir. You might want to look it up.
The advantage of a gas heating system is that it is more proven than heat pumps, easy to operate and adjust even for local plumbers resistant to further training, inexpensive to maintain, durable, cost-effective to install, and space-saving. Its only drawback is the perception—it’s like the image of a Ford Fiesta. You have to be okay with neighbors saying, “Oh—you still use gas?” You can reply, “Yes, we’re still debating whether to switch to lignite coal...”
Tilt-and-turn vents are installed in all windows, not in the doors. The system is RegelAir. You might want to look it up.
The advantage of a gas heating system is that it is more proven than heat pumps, easy to operate and adjust even for local plumbers resistant to further training, inexpensive to maintain, durable, cost-effective to install, and space-saving. Its only drawback is the perception—it’s like the image of a Ford Fiesta. You have to be okay with neighbors saying, “Oh—you still use gas?” You can reply, “Yes, we’re still debating whether to switch to lignite coal...”
Just a quick note because of limited time:
Controlled residential ventilation is offered, but no space is planned? That’s the general contractor’s problem. They should solve it without any poor compromises. Ideally, you get a discount on the heat pump.
Make sure the underfloor heating is designed to be compatible with heat pumps, even if you end up using gas.
Solar panels are always worthwhile. Self-consumption is possible even without a heat pump.
Controlled residential ventilation is offered, but no space is planned? That’s the general contractor’s problem. They should solve it without any poor compromises. Ideally, you get a discount on the heat pump.
Make sure the underfloor heating is designed to be compatible with heat pumps, even if you end up using gas.
Solar panels are always worthwhile. Self-consumption is possible even without a heat pump.
M4rvin schrieb:
"Actually no space" means there is no space left in the utility room for a washing machine and dryer... Systems like a Vaillant Recair fit perfectly above the washing machine and dryer, as long as you haven’t stacked them.
Domski schrieb:
Make sure the underfloor heating is designed to be heat pump compatible, even if you end up using gas in the end. Important point, so you don’t choose a heat pump later and find out the system was designed for gas.
Domski schrieb:
Just quickly because I’m short on time:
Controlled ventilation system offered, but no space planned? That’s the general contractor’s problem. They need to solve it without making any poor compromises. Ideally, you’ll get a discount on the heat pump as a result.
Make sure the underfloor heating is designed to be heat pump compatible, even if you eventually go with gas.
Solar panels are always worthwhile. Self-consumption works even without a heat pump. Does it already count as “offered” if the controlled ventilation system is listed as an “optional extra” in the contract?
Kekse schrieb:
Our controlled ventilation system will be installed in the attic, not in the utility room… Yes, ours should be there as well. But apparently, there’s suddenly not enough space! (See title)
ares83 schrieb:
Systems like a Vaillant Recair fit perfectly above the washing machine and dryer, as long as you don’t stack them directly on top of each other.
Important point: Don’t end up choosing a heat pump that is dimensioned for gas heating afterward. That’s a good point! That could be a good place to start, thanks!
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