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
ypg schrieb:
The general contractor/architect dropped the ball. Bet on it!
A mechanical ventilation system with heat recovery can be hung from the ceiling. And if you have a higher ceiling than we do (2.45 meters (8 feet)) it would work great in the freezer room.
It doesn’t have to be a continuous wall; the ducts just need to be able to exit somewhere near the top. Then they disappear in the screed.
However, the house is already very “tight.” Where are you planning to put your wardrobe? Where will you store anything at all? If the outlets are meant to be in the upper floor ceiling, then yes. For installation on an exterior wall, the walls are too thin.
Zaba12 schrieb:
If the outlets are supposed to be in the upper floor ceiling, then yes. For installation in an exterior wall, the walls are too thin.That's correct. We have drywall (gypsum board) walls on the upper floor, so the outlets were installed from below to come out at the top of the wall. With solid walls, of course, it’s possible to go up one more floor.
B
boxandroof24 Feb 2019 22:03Zaba12 schrieb:
If the outlets are to be in the upper floor ceiling, then yes. But here’s one option: a mechanical ventilation system with heat recovery, a manifold, and sound attenuators mounted on the ceiling of the utility room, with the outlets in the upper floor floor (or routed from the upper floor floor up through the interior walls to the upper floor ceiling, although this could cause sound bridges or other issues).
The concrete slab between the ground floor and upper floor also needs to be thicker than currently planned to accommodate the mechanical ventilation system; we needed at least 22cm (9 inches).
boxandroof schrieb:
But that could be an option: mechanical ventilation with heat recovery, with a distribution manifold and sound attenuators installed on the ceiling of the utility room, and the outlets on the upper floor floor (or routed from the upper floor floor up inside the interior walls to the upper floor ceiling… but that might cause sound bridges or other issues).
The concrete slab between the ground floor and upper floor also needs to be stronger for the mechanical ventilation than currently planned on average; in our case, at least 22cm (9 inches) was required.Yes, in our case it is also consistently 22cm (9 inches).
ypg schrieb:
The general contractor/architect dropped the ball. I bet on it!
A mechanical ventilation system with heat recovery can be installed under the ceiling. And if your ceiling height is higher than ours (2.45m (8 feet)), it would work perfectly in the technical room.
It doesn’t have to be a continuous wall; the ducts just need to come out somewhere near the top. Then they disappear into the screed.
However, the house is already quite “tight.” Where are you planning to put your wardrobe? Where will you store anything at all? The height should actually be around 2.60m (8 feet 6 inches), but if the ceiling needs to be thicker because of the mechanical ventilation system… we’ll see what the general contractor has to say tomorrow!
The wardrobe fits perfectly in the bedroom!
boxandroof schrieb:
But that could be an option: mechanical ventilation system with heat recovery, distributor and silencer mounted on the ceiling of the utility room, and the outlets in the upper floor in the floor (or from the upper floor floor going up inside the interior walls into the upper floor ceiling… but that might cause sound bridges or other issues).
The concrete ceiling between ground and upper floor also needs to be thicker than currently planned for the ventilation system; we needed at least 22cm (9 inches). I can’t really picture the ducts in the floor… Just holes with grilles in the floor? A wall would be nicer.
Do you think a mechanical ventilation system with heat recovery makes sense here? Or would an individual room ventilation system and window-frame ventilators be better? It really looks like the house wasn’t designed for a mechanical ventilation system with heat recovery!
Similar topics