Latest / RENEWA Sanierungsnavigator / Fußbodenheizung im Bestand nachrüsten: Was bringt es und wie geht das?
Transcript
- Oliver: Today will about a topic that always up on the table during namely the floor heating. Of is now almost standard but what about the old building? Can you simply rearm Is it in the end? So how do my heating costs and what systems and rearm options are there? And the end, funding funds are even available All this was answered by Alexey and we will now. Hi Alexei, nice to you back. Let's start at it to foot-bottom heating, noticed how popular it has become. But why is that? There are several reasons. Of course, comfort plays big role. Especially when you about foot-bottom heating, it's the cold feet that you don't have anymore. But also other... So, comfort-themed, ⁓ the heating system has to less hot water. Depending on the type of heating system, can have a very strong effect on the efficiency. So, 35 to 25 degrees in extreme heat. There are also older heaters, which are 40 degrees. But heat bodies are of these 40 degrees. It's a minimum 45°C in room. Theoretically, open-end in older systems. 90°C in most the Between 55°C and 70°C. I'm almost at the water heater. But that's what the foot-burner heater does. If I the pre-heating room menu, predestined for a heat pump. Yes, that's the typical topic. Heat pump... But that be misunderstood Of course it is supportive. If you a floor heating in the whole building, you reduce the temperature from 55 to 35 degrees and thus you save 20 to 25 percent of at the heat pump. to the same amount of simply because it more Now we have many listeners who in residential buildings, you can assume that. Now just said that it is not a must is just an add-on, or makes it little easier if there floor heating. Is a floor heating even residential buildings afterwards? Yes, There is... There are possibilities. It depends on what kind of construction have. Do you have a wooden beam ceiling or a massive structure? There are many Maybe I'll you two typical ways to build Often you just... the concrete plate with little bit of insulation and then put the estuary on it. This is intended to the foot floor heating afterwards. Then the structure of the estuary must a minimum strength, so that 40 millimeters. Because otherwise you have the problem that the estuary is too much broken and with passion, that you the foot floor heating in But then you don't to the floor completely. That makes it much less invasive. The other variant is the wooden beam ceiling. You the tiles up. Depending on is between the wooden beam ceiling, can blow in if it is not there yet. To prevent too much heat from down. Especially relevant of course with the components that are the air or basement borders. And then can put this line and transfer the heat directly to the ground. Has a huge advantage over all massive That is not so slow, but can the time be depending on what you aim at. Space height can course play a role if you new constructions. if I do a new construction with floor heating and then I always get higher, then someone always directly asked the question of insulation, do I it from below, do I it from above. If I it from above, be that you lot of and accordingly everything that to the floor. So doors, especially. That's why, in principle, you to prevent you with a floor. So don't start think that's point You said how high the rooms are. We construction briefly, also about the insulation. And it probably also sense how it been energy-savaged, so how my heat need is practical. If I a floor heating, Does this heat costs? Yes, but the amount depends on several factors. So you can where I heat. On the hand, by the distribution of heating system. This warm water is distributed in building and if that with a lower temperature, then I just less losses. That's the main reason why I just save But that's also now, I would say, no wonder. They can't reduce the heat demand from the building You just to other things. We already have over core insulation, over roof insulation. window exchange etc. That has the in first step and is in a certain extent because you say up to 80 to 100 watts per square meter you need to to a foot-bottom heating. If you more heat load, can support but not alone. Because I'm simply limited in the amount of lines that I per square meter. Okay, that makes sense. Now you've already about certain systems. So subject of milling has definitely already been liked. Estrich now. There are also classic installations. There may even be electric foot floor heating. Maybe we them. what they are what the classic is. So no if I'm renovating or a storage building. I was a bit hasty. I just directly. Now the typical questions come from customers. How do I my storage building? You've the basic things yourself. What's especially important Interesting points are that these systems from each other. First, height of structure, a bit of a and therefore also time intensities. wet systems are much more because you have to rebuild concrete or estuary is it has to You to drying times until it on and so on. is estrous system, an advantage. And then there also a difference. Do I have a wooden beam cover? Yes, exactly, you just said that. So could probably say something like the classic wet layout, you do that in new building. or if you a core restoration, you everything new. With dry estuary systems, you have already said they are faster to install. But what is the system that you most often in practice now? Especially in stock building, if you it later. The subsequent milling in the existing estuary. because here in the of Nuremberg and surroundings There lot of houses built massive ceilings with aesteric and that's just predestined for milling. Because you any additional building height and because it's relatively practical. We often it in practice with a basement ceiling insulation, then just underside, then you have it dampened, but not this additional structure. I'll take the outer side again. Maybe we look again when it would be suitable or if it suitable There are electric floor heating. Are there areas? Well, of you can basically do it for the whole building. Is from an energy point view, it makes sense. So for smaller areas, yes, my bathroom, that's the typical. You can do and that happens with our renovations from time time. Because it's just too time consuming to bring in the lines Building height is another topic here. But I wouldn't recommend because you just have one-to-one electricity heating. Strictly speaking, it is even forbidden to install for the entire building. And regardless of it's forbidden or allowed, that's just a waste Because then I 30,000 kWh. Because I have a power consumption of direct. We don't to back either. You could now see if you that with photovoltaics, but I'm afraid we the barrel. In any case, with heat needs, it's but not a solution and not a matter Now you heat demand is a good keyword for planning. So what do I to before I install or before I decide on a system, planning in What should I pay What should I do before I In one word, there are two. In terms of it would good. It's to in terms of because it helps us with because the floor heating has to per room. There are course also simplified variants, but especially in existing buildings, especially if they are a bit built up. So my building has not so this quadratus practically good house. It's already useful to all the components. A space heating calculation on hand. the respective U-values and air flow loss and so on. And then a room-wide heat load out, per room, a single heat load, based on which one can then how much distance I to be to the foot and floor heating there. In general, in the bathroom I lot more. If I something now, there anything for the owner afterwards? works than before. Especially if they're used to turning the heater on five before they to bathroom. I can them Yes, you're already about the important topic. Durability is an exception. When I this wooden roof and it without so much mass above it. Then from the floor construction, then I don't that of slowness, but usually with massively built-up floors, is a certain slowness that keeps the heat in building and also makes the floor heating less regular. That's it's no longer useful to night reduction somehow because it's already day In addition, is possibly even another advantage. You have to to the details. You can a foot-bond heater little better for cooling. That is especially interesting Our temperatures are getting higher and We have 30 degrees in office in June. And accordingly, you can also such a component here. You don't have to a climate storage So a few degrees are practically also in if I my room temperature. Exactly, that's just within limits. Then we're a little bit at the end physics and groundwater, because if the ground too cold now, then can to moisture problems. So roughly I'll that for now. But basically you can cool down Now there is a question that always interests Namely, there any that I a foot-bottom heater? Short answer, yes, there is. As always, several funding providers. One is the BAFA. In this case even under circumstances the KfW, which is a federal funding. And then there is also something from The state banks in Hamburg, here for example the IFB. Yes, and how much funding would probably be the next question. You it right ahead. So that's a bit of what What you do, I renovate the heating system in combination with the floor heating and I still have enough funding available. Then I get the same funding as the heating system. That means In a realistic case, I 55%. The other case would the costs are exceeded or alternatively, the repairs are as individual measures. So not the heating from the system. Then there is 15%. As you just said, if you a heat pump, example, I can add costs that I can calculate with. So the maximum amount. I can use the maximum amount to promote this. I that very exciting. We recorded a video about It said that the value is 55%. At least we are at around 30%. And at the maximum amount around 70%. Even though it rarely achieved. But can still say that are already considerable increases. Exactly. maybe I add that if I a one-family house, so one-family house for just one apartment, then this combination of heat pump and floor heating is usually not at all possible to these costs, that you the 55 percent. If I more apartments, two, three and more, then that is possible. Does everything for a one-bedroom apartment in a one-family house? Definitely. Cool. That's a good life hack, if you can you. Another life hack, we've in the heat pump segment. But I want it again, because I it's important that you don't break We always talk about high funding sums, be it the 15 percent or if you get it, the 30 to 55 percent. You can it relatively quickly with a classic mistake that many do. Yes, signing is the most mistake. Maybe a step back. The right timing is not only for the signature, but also for the individual measures. Especially if you several applications, you to look carefully at what to when, what you where. so that it from each other. Here it is a about the example, I have a floor heating that I to and maybe in combination with a heat pump I don't enough costs then of course it has to reasonably separable. the simplest case, two offers from the manufacturer. The more case would be same offer in different positions, but ... The way to is to separate offers. Then you this in mind and don't have to anything. In there are no problems And then, of course, time of the application is the biggest issue. Always apply if the application is signed but with pushing conditions. Not just sign. We again. I think that has to be stuck in the heads of all. Because that would be really annoying to really get the whole promotion Then we'll it again. Maybe if we the goal, if you should summarize it, for whom is it it? Especially who should think On a footrest and maybe get If you plan a bigger renovation, that's the one point. If you plan to a heat pump, then that can also useful, if it is not necessary. If the heating bodies are old anyway and you no problem with you can in the upper floor the lower floor and vice versa. ⁓ then can that in living condition, usually it is most when you the floor heating ⁓ when you don't in yet. That's also with most customers who to us. They buy their furniture and then the topic of floor heating is on and then there more out of it or they come directly with the larger plan and The floor heating is often the comfort argument, but it also has an effect on how much energy you use. A few words from me. My name is Michael Suhr. am the founder and manager of Reneva. We Reneva also know how complex energy repairs are today. Full of manual calendar, countless technical possibilities and a driving jungle that many owners rather brake than motivate. This is where we start. We connect energy management, qualified manual operations and digital processes to a clearly structured system. For your budget, we develop the best possible repairs for your real estate. provide you highest possible funding and accompany you from the initial analysis to the implementation with only one permanent contact partner. If you want to know what your real estate useful, then start the first step now. Visit us at renevati and arrange an unlimited consultation.