Who would like to share their experiences with the LTM decentralized ventilation system?
I have a newly built Tuscan-style house with 42.5 Termopor plan bricks, triple glazing installed according to RAL standards, and the LTM ventilation system.
I have to say, despite the high cost, I would install the LTM system again at any time. I am very impressed with it.
I would appreciate feedback from another LTM user.
I have a newly built Tuscan-style house with 42.5 Termopor plan bricks, triple glazing installed according to RAL standards, and the LTM ventilation system.
I have to say, despite the high cost, I would install the LTM system again at any time. I am very impressed with it.
I would appreciate feedback from another LTM user.
There are now systems available for cleaning centralized mechanical ventilation with heat recovery (MVHR) units, some of which are even certified. I believe that maintaining a mechanical ventilation system is similar to general household cleanliness. For example, if you don’t clean your home for 5–10 years, your children can also become ill as a result.
Try searching on Google:
1. Enter the term "CleanSafe mechanical ventilation"
2. Click on the first result
Try searching on Google:
1. Enter the term "CleanSafe mechanical ventilation"
2. Click on the first result
Hello,
regarding hygiene in air ducts:
In most cases, the ducts are made of sheet metal and therefore are less prone to mold growth or similar issues, as microbial growth on metal surfaces is minimal. Additionally, the necessary conditions for microbial growth must be present. Most systems also use high-quality filters.
In my opinion, air ducts in commercial buildings require no maintenance. It might be different in public buildings, although I have never seen ducts being cleaned there either.
Best regards
regarding hygiene in air ducts:
In most cases, the ducts are made of sheet metal and therefore are less prone to mold growth or similar issues, as microbial growth on metal surfaces is minimal. Additionally, the necessary conditions for microbial growth must be present. Most systems also use high-quality filters.
In my opinion, air ducts in commercial buildings require no maintenance. It might be different in public buildings, although I have never seen ducts being cleaned there either.
Best regards
I prefer decentralized systems.
My opinion is based on logic, which tells me:
Better to have 8 external wall units in a single-family home with a total duct length of maybe 3.2m (10.5 feet)
than one central unit with 10, 20, 50, or 70m (33, 66, 164, or 230 feet) of ductwork, which almost certainly cannot be kept clean easily or maybe even at all over the long term. Even if cleaning options exist, when would you schedule such a cleaning? At fixed intervals, or by first performing an endoscopy? I definitely do not want to know what those ducts look like after 15 years! That would make an interesting field study. Maybe a small UPUAUT device for ventilation ducts could be developed. At some point, that idea got stuck in the “pyramid.” =)
Also, air then has to be moved over a much longer distance.
If one unit fails, the entire system does not go down, unlike with a central system.
The external wall units are easily accessible and simple to maintain.
You could even, depending on your budget, install the external wall units room by room if the sleeves and wiring are planned in advance.
I also want to say something about efficiency ratings:
There is an incredible amount of formulas, technical jargon, highly precise calculations, and theories thrown around.
The problem is, it’s all just theory. Or does anyone here really believe that if their exterior wall is calculated to have a U-value of 0.15, it actually achieves that exact value?
I would argue that the actual deviation could be as much as 50%.
For example, the thermal insulation value of wood is considered about 40% better in Switzerland (at least significantly better, and professors argue over the exact value—the “wise value”!) and used in those exact atomic physics formulas than in Germany.
Well, the Swiss are just a bit better than the Germans at many things =).
Jokes aside, who really believes Swiss wood is so much better? It’s simply because different specialists and scientists have “calculated” that value.
Anyone familiar with wood and who has worked with it will confirm that this is nonsense.
Unfortunately, I fear that the same applies to the declared properties of bricks, insulation materials, etc.
And probably also with the efficiency ratings and performance calculations of heating systems.
Every day I see homeowners argue about whether their wall should have a U-value of 0.22 or 0.23.
If you want to be truly certain, you’d have to open the wall of a timber-frame construction with vapor barrier after 15 years and measure how damp or deteriorated the mineral wool insulation is.
Or ask friends and acquaintances how much energy they have consumed and which companies/materials/techniques they are satisfied with.
Then you’ll see what the stated U-value of the wall at the time of construction or purchase is really worth.
A building services engineer once told me:
Plan and install only materials and systems that have proven themselves on the market for at least 15 years.
The first 15 years are unfortunately a “testing phase.”
Think of the miracle fiber asbestos!
Or Lindane, or Xyladecor, or the Sunmachine.
Who knows what else lies ahead for us in terms of building materials, construction, and heating technology.
All I can say is: build houses using materials and systems that are known to work and have proven themselves over a relatively long time.
The entire industry has jumped on the insulation, technology, and energy-saving hype and made sure that the labor/material ratio is around 25/75% instead of about 50/50.
Here I ask myself whether extremely careful craftsmanship during house construction might be worth just as much, or even much more, than special materials and special technology that might be installed by pushy salespeople, along with endless calculations and formulas.
Purchasing decisions are made on emotion, unfortunately, not on reason!!
Apparently, many future homeowners don’t want to hear the truth.
They want to hear how amazing their dream house will be, how great its properties are, how little energy it will consume, and how quick and cheap everything will be. And of course, how quickly they must sign now so that exorbitant, disproportionate, and completely unjustified sales commissions can quickly flow.
Building is a demanding, stressful, and extremely taxing time... perhaps the worst event in the life of a young average family aside from death or illness.
Therefore, no one should exploit this. No professional home sellers, no planners, no construction companies, no industry, and no one else.
Failing grade, missing the point, sorry.
I would also take the LTM.
My opinion is based on logic, which tells me:
Better to have 8 external wall units in a single-family home with a total duct length of maybe 3.2m (10.5 feet)
than one central unit with 10, 20, 50, or 70m (33, 66, 164, or 230 feet) of ductwork, which almost certainly cannot be kept clean easily or maybe even at all over the long term. Even if cleaning options exist, when would you schedule such a cleaning? At fixed intervals, or by first performing an endoscopy? I definitely do not want to know what those ducts look like after 15 years! That would make an interesting field study. Maybe a small UPUAUT device for ventilation ducts could be developed. At some point, that idea got stuck in the “pyramid.” =)
Also, air then has to be moved over a much longer distance.
If one unit fails, the entire system does not go down, unlike with a central system.
The external wall units are easily accessible and simple to maintain.
You could even, depending on your budget, install the external wall units room by room if the sleeves and wiring are planned in advance.
I also want to say something about efficiency ratings:
There is an incredible amount of formulas, technical jargon, highly precise calculations, and theories thrown around.
The problem is, it’s all just theory. Or does anyone here really believe that if their exterior wall is calculated to have a U-value of 0.15, it actually achieves that exact value?
I would argue that the actual deviation could be as much as 50%.
For example, the thermal insulation value of wood is considered about 40% better in Switzerland (at least significantly better, and professors argue over the exact value—the “wise value”!) and used in those exact atomic physics formulas than in Germany.
Well, the Swiss are just a bit better than the Germans at many things =).
Jokes aside, who really believes Swiss wood is so much better? It’s simply because different specialists and scientists have “calculated” that value.
Anyone familiar with wood and who has worked with it will confirm that this is nonsense.
Unfortunately, I fear that the same applies to the declared properties of bricks, insulation materials, etc.
And probably also with the efficiency ratings and performance calculations of heating systems.
Every day I see homeowners argue about whether their wall should have a U-value of 0.22 or 0.23.
If you want to be truly certain, you’d have to open the wall of a timber-frame construction with vapor barrier after 15 years and measure how damp or deteriorated the mineral wool insulation is.
Or ask friends and acquaintances how much energy they have consumed and which companies/materials/techniques they are satisfied with.
Then you’ll see what the stated U-value of the wall at the time of construction or purchase is really worth.
A building services engineer once told me:
Plan and install only materials and systems that have proven themselves on the market for at least 15 years.
The first 15 years are unfortunately a “testing phase.”
Think of the miracle fiber asbestos!
Or Lindane, or Xyladecor, or the Sunmachine.
Who knows what else lies ahead for us in terms of building materials, construction, and heating technology.
All I can say is: build houses using materials and systems that are known to work and have proven themselves over a relatively long time.
The entire industry has jumped on the insulation, technology, and energy-saving hype and made sure that the labor/material ratio is around 25/75% instead of about 50/50.
Here I ask myself whether extremely careful craftsmanship during house construction might be worth just as much, or even much more, than special materials and special technology that might be installed by pushy salespeople, along with endless calculations and formulas.
Purchasing decisions are made on emotion, unfortunately, not on reason!!
Apparently, many future homeowners don’t want to hear the truth.
They want to hear how amazing their dream house will be, how great its properties are, how little energy it will consume, and how quick and cheap everything will be. And of course, how quickly they must sign now so that exorbitant, disproportionate, and completely unjustified sales commissions can quickly flow.
Building is a demanding, stressful, and extremely taxing time... perhaps the worst event in the life of a young average family aside from death or illness.
Therefore, no one should exploit this. No professional home sellers, no planners, no construction companies, no industry, and no one else.
Failing grade, missing the point, sorry.
I would also take the LTM.
Hello!
I understand the skepticism — but not the conclusion. In my house, I also have 20 decentralized exterior wall units without excessive duct lengths — these devices are called "windows"; they’ve existed for over 15 years.
In the description of the LTM units, I found no information on efficiency — and certainly nothing questionable.
The highlight was the following statement: "Due to the low air exchange rate, the interior (in summer) stays cooler longer than with window ventilation." Here, the low capacity is even presented positively. So basically, it’s best not to ventilate at all, and it will stay cooler even longer.
I have already expressed my doubts about the effectiveness of decentralized systems elsewhere. If the capacity now also falls short of window ventilation, I no longer see any theoretical advantage — except for the seller’s.
In summer, I therefore ventilate (and cool) very effectively mainly at night, and in winter, I forgo heat recovery of a few percentage points, which is probably more than offset by the investment, electricity consumption, and noise pollution.
Best regards,
TomTom1
I understand the skepticism — but not the conclusion. In my house, I also have 20 decentralized exterior wall units without excessive duct lengths — these devices are called "windows"; they’ve existed for over 15 years.
In the description of the LTM units, I found no information on efficiency — and certainly nothing questionable.
The highlight was the following statement: "Due to the low air exchange rate, the interior (in summer) stays cooler longer than with window ventilation." Here, the low capacity is even presented positively. So basically, it’s best not to ventilate at all, and it will stay cooler even longer.
I have already expressed my doubts about the effectiveness of decentralized systems elsewhere. If the capacity now also falls short of window ventilation, I no longer see any theoretical advantage — except for the seller’s.
In summer, I therefore ventilate (and cool) very effectively mainly at night, and in winter, I forgo heat recovery of a few percentage points, which is probably more than offset by the investment, electricity consumption, and noise pollution.
Best regards,
TomTom1
S
selbstzahler20 Apr 2013 13:46Surprisingly loud!
We installed an LTM 1230 with double control SL-K in a bedroom. When we first turned it on, I noticed that the device is very loud. The installer who selected and delivered the unit was also surprised by this. After I complained, a sales representative from the manufacturer called me and explained with practiced words that only the noise level of setting 1 (out of 3 levels) is suitable for sleeping. On the manufacturer’s website, this level is specified as 21 dB(A), while the legal limit for bedrooms is 24 dB(A).
Subjectively, this level still sounds very loud and certainly does not allow me to sleep undisturbed. My request to cancel the purchase was refused.
Conclusion: The fan is unusable for me, and the money has been wasted.
We installed an LTM 1230 with double control SL-K in a bedroom. When we first turned it on, I noticed that the device is very loud. The installer who selected and delivered the unit was also surprised by this. After I complained, a sales representative from the manufacturer called me and explained with practiced words that only the noise level of setting 1 (out of 3 levels) is suitable for sleeping. On the manufacturer’s website, this level is specified as 21 dB(A), while the legal limit for bedrooms is 24 dB(A).
Subjectively, this level still sounds very loud and certainly does not allow me to sleep undisturbed. My request to cancel the purchase was refused.
Conclusion: The fan is unusable for me, and the money has been wasted.
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