ᐅ Experiences with decentralized controlled residential ventilation systems?

I believe my Inventer system is pretty poorly done, with both planning and installation errors. Nothing has been insulated with foam at all!

I don’t really care anymore since it’s just a rental, and the new building will be constructed in a year. By the way, the landlord, who built the two single-family houses right next to each other, decided not to install Inventer units in his own house.

Hello SirSydom,

SirSydom schrieb:
I think my Inventer system is pretty messed up. Both planning and installation errors. None of the pipes are foam insulated!

If the pipes are not foam insulated, that is a clear installation error. Inventer even requires it in their installation manual.

Otherwise, I usually approve systems on behalf of Inventer and my regional representative, even if I didn’t build them myself.
With such errors, I strictly refuse to approve the system, and the associated warranty is also void.

M. O. schrieb:
Hello SirSydom,

I have installed quite a few ventilation systems by now, many of them from Inventer, in apartments and houses. So far, no one has ever complained about the noise.
Especially in bedrooms (master bedroom, kids’ rooms, guest rooms), I make sure the fans can be turned off. For example, some controllers (ZR8 controllers) have a switch on the regulator itself that, when set to zero, shuts the system off completely for up to one hour.
Additionally, for systems with central control, you can install a timer relay for each bedroom. By using a push button in that room, the fan can be turned off separately for a certain period. There is also a small module that fits in a flush-mounted box under the switch, which allows the fans to be turned off for 2, 4, or 8 hours.
.

Hello,

I am interested in this. In about 4-6 weeks, I will have a decentralized ventilation system from Ma...o installed in my new build (4 units for 160m (1722 ft²)). Controlled mechanical ventilation was excluded due to cost. The idea was to integrate a timer relay(?) into the control so that I have the option not to run the system continuously but to include breaks, for example, 30 minutes ventilation, 30 minutes pause. The control is quite simple, only two buttons. I have little knowledge of electrical systems myself. Could I get some advice?

Best regards

Nupogodi schrieb:
Hello,

I’m interested in this. In about 4–6 weeks, I will have a decentralized ventilation system from Ma...o installed in my new build (4 units for 160 m² (1,722 sq ft)). Controlled residential ventilation was excluded due to cost. The idea was to integrate a timer relay into the control so that I can operate the system intermittently, for example 30 minutes ventilation, 30 hours pause. The control is quite simple, with only 2 buttons. I have little knowledge of electrical systems myself. Can anyone give me some advice?

Hello Nupogodi,
in principle, this is a simple matter. The line going to the fans is routed through a timer relay. A push button in the bedroom activates the relay when pressed, temporarily switching off that specific fan for a set time.

I recommend not switching off all fans with a single relay, but only those in the sleeping areas (bedrooms, children’s rooms, guest rooms). If possible, control each separately.
A ventilation system only makes sense if operated continuously. So, running it just 30 minutes and then pausing for 30 hours (I assume this was a joke) is not practical. If you really planned to ventilate like that, you would need to ensure that the vents are closed during the off periods, otherwise you will experience unpleasant cold drafts, especially in winter.
Has someone professionally designed your system, or did you just decide on the number of fans yourself? Four fans for 160 m² (1,722 sq ft) is borderline, and—based on my rough calculation—you will just about achieve the necessary ventilation to prevent moisture damage with these units. Room geometry must also be considered, as there are often unventilated dressing rooms adjacent to bathrooms, for example. These have little or no air exchange, which can lead to issues.
Four fans in a single-story bungalow are different to consider than the same number of fans in a multi-story house.
A ventilation system, when professionally planned, is always designed for nominal ventilation, as required by DIN 1946-6.

Have a great Sunday
M. O.

M. O. schrieb:
Hello Nupogodi,
basically, this is a simple matter. The cable that goes to the fans is routed through a timer relay. A push button in the bedroom itself effectively activates the relay when pressed and interrupts one specific fan for a set period of time.

I recommend not switching off all the fans with one relay, but only those in the bedrooms (master bedroom, children’s rooms, guest rooms). If possible, each should be switched off separately.
A ventilation system only makes sense if it is operated continuously. So not just running it for 30 minutes and then pausing for 30 hours (I assume that was just a joke). If you actually wanted to ventilate that way, you would need to seal the openings during the times when ventilation is off, otherwise you will notice unpleasant cold drafts, especially in winter.
Has someone planned the system for you, or did you just decide yourself how many fans you want? Four fans for 160 sqm (1722 sq ft) is already borderline, and based on rough calculations, with the fans from this manufacturer you barely reach the necessary ventilation to protect against moisture. The room geometry must also be considered, since there are often, for example, unventilated dressing rooms directly next to bathrooms. In those cases, very little or no air exchange occurs, and you can expect problems.
Four fans in a bungalow-style house have to be viewed differently than the same number of fans in a multi-story house.
A ventilation system, when planned properly by professionals, is always designed for nominal ventilation, as required by DIN 1946-6.
Have a nice Sunday
M. O.

The idea of running the system with pauses does not come from the fear that the system might be too loud when falling asleep, but from my doubt that heat recovery will work continuously at -10 to -15 degrees Celsius (14 to 5°F) in winter, because the ceramic core will cool down too much. Of course, I don’t necessarily have to do anything right now and can wait to see what happens. In an emergency, you can always turn off the system if you notice that the interior wall next to the air inlet becomes too cold and gets damp as a result. Therefore, I think the whole system should be switched off with a timer relay.

Why only 4 units? On the ground floor, 2 fans operate in parallel – living room and bedroom; on the upper floor, 2 operate in parallel in both children’s rooms. On the upper floor, there is a gallery in between, which is ventilated conventionally through the ventilation of the two children’s rooms. In both bathrooms and the utility room (?), I have standard fans with humidity control, also from Maico, and in the kitchen (not open plan) a ventilation outlet with an electrically operated damper (Bielmeier, DM 100 mm (4 inches)). This was recommended to me by Maico’s sales team to meet the minimum requirements. The entire system cost me exactly 3,000 without installation, because I did not want to invest more. The house (1.5 stories) is well insulated and thermally insulated (Poroton 24 cm (10 inches), 12 cm (5 inches) insulation, 10 cm (4 inches) facing brick), triple-glazed. Why Maico – I found hardly any difference compared to similar devices. An advantage of these devices is the electric damper (closes when off) and that the fan is mounted on the outside of the ceramic core for noise reasons. The price was also reasonable.

Can I have a switch installed for the decentralized ventilation system?