ᐅ New Single-Family House Construction (KFW70) / Aerated Concrete vs. Sand-Lime Brick / Which Material to Choose?
Created on: 31 Jan 2014 08:27
L
Lacos
Hi everyone,
We are planning to build with a general contractor and have collected some offers. Some use aerated concrete, others use calcium silicate bricks. Some combine the two, using aerated concrete for the exterior walls and calcium silicate bricks on the inside.
What would you recommend? Is this combination of aerated concrete on the outside and calcium silicate bricks on the inside common and preferable?
Should we be concerned about cracks due to the different expansion properties of the two materials, or is this not an issue with proper construction?
What would you currently choose to build with or have built—what is your preferred building material?
Thank you in advance,
Lacos
We are planning to build with a general contractor and have collected some offers. Some use aerated concrete, others use calcium silicate bricks. Some combine the two, using aerated concrete for the exterior walls and calcium silicate bricks on the inside.
What would you recommend? Is this combination of aerated concrete on the outside and calcium silicate bricks on the inside common and preferable?
Should we be concerned about cracks due to the different expansion properties of the two materials, or is this not an issue with proper construction?
What would you currently choose to build with or have built—what is your preferred building material?
Thank you in advance,
Lacos
Explosiv schrieb:
....As long as one kWh of gas costs only about one third of one kWh of electricity, an air source heat pump has to work really hard to recover its investment costs.... An air source heat pump does not require connection costs of 2...3 thousand euros. Therefore, the investment costs for gas condensing boilers and air source heat pumps are usually comparable! With an air source heat pump you can cool, which is not possible with a gas condensing boiler. Explosiv schrieb:
...And the downside: the colder the outside air gets and the more urgently heating power is needed, the worse the efficiency of the air source heat pump becomes. This is often compensated by an electric heating element, which causes costs to skyrocket.... How pointless is it that this contributes, if at all, less than 1% of the annual heating energy demand in well-designed systems! A trivial amount within the overall balance. In new buildings, you usually have to buy an uneconomical solar thermal system for domestic hot water together with a gas condensing boiler, which is unfortunate.
With gas condensing boilers, consumption is always higher than demand; with air source heat pumps, it is the opposite.
Regards
€uro schrieb:
You don’t get anything truly valuable for free, unless you live in socialism. Regards.What exactly was that supposed to mean?€uro schrieb:
An air source heat pump does not require €2,000 to €3,000 (around $2,200 to $3,300) in connection costs. Therefore, the investment costs for gas condensing boilers and air source heat pumps are usually comparable! An air source heat pump can provide cooling, which gas condensing boilers cannot. Hi
The gas connection is installed during new construction along with other connections, resulting in a lower price due to shared earthworks. At my building site, there is a special offer of 950 EUR (about $1,050) for the gas connection; without the offer, the cost can be up to 1,500 EUR (about $1,650) for the gas connection alone.
€uro schrieb:
How pointless—that, if anything—is less than 1% of the annual heating energy demand for well-planned systems! A trivial amount in the overall balance.That depends on the length and severity of the winter. And I doubt that 1% is sufficient. Even for well-designed systems, reaching a figure of 3% annually is tough. And you need at least that to keep up with gas.
€uro schrieb:
With gas condensing boilers in new builds, you usually have to buy an uneconomical solar thermal system for domestic hot water by default, how awfulThe only downside—as with everything—there is a shadow where there is light. However, these systems have almost no wear and tear and inexpensive spare parts. Over the long term, they can pay off since sunlight is free.
€uro schrieb:
With gas condensing boilers, the consumption is always higher than demand; with air source heat pumps, it is the other way around.
Best regards. On the other hand, electricity costs at least three times as much as gas. Some critics have claimed—and they have actually said—that heat pumps are more a marketing tool of energy regulations, because companies no longer make money with night storage heaters. The customer pays the same for consumption but needs more technology, and there is more that can go wrong. And according to Murphy’s Law...
I think there are some things you might not be aware of.
A heat pump is considerably more robust and requires much less maintenance than a gas condensing boiler combined with a solar thermal system.
Think about how often a refrigerator breaks down versus how often it is serviced.
In my opinion, heat pumps are the only way to eliminate the use of fossil fuels in the future. To achieve this, a well-insulated building combined with an efficient heating system with low energy demand is necessary. Currently, heat pumps are simply state of the art, as no other heating system achieves such efficiency with "low" investment costs.
A heat pump is considerably more robust and requires much less maintenance than a gas condensing boiler combined with a solar thermal system.
Think about how often a refrigerator breaks down versus how often it is serviced.
In my opinion, heat pumps are the only way to eliminate the use of fossil fuels in the future. To achieve this, a well-insulated building combined with an efficient heating system with low energy demand is necessary. Currently, heat pumps are simply state of the art, as no other heating system achieves such efficiency with "low" investment costs.
P
perlenmann11 Feb 2014 06:52Actually, this topic should be settled by now, but honestly, I’m not convinced. Apparently, I’m not alone with my view—Musketier understood me, at least.
Where are your helpful answers? You didn’t even manage to reply to my questions. So how helpful is what you write in this forum? Instead, I get labeled as an “anonymous advisor.”
€, you should ask yourself what kind of forum this is!
How many “building experts” are there here? I think you should switch to another forum because there’s no free lunch. However, I can’t imagine your approach (for acquiring clients) would be better over there?!
As I understand it, this forum is a place “by users for users.”
So ANONYMOUS ADVISORS, of course without liability, share their experiences.
What you’re doing is not helpful advice; it’s just a clumsy marketing tactic.
If I am mistaken in my opinion, then please delete my account.
As I said, in the other forum, free advice is rarely given, but at least you get answers from experts!
Sorry, but the customers who fall for your scheme are the ones being ignorant.
Every now and then, free tips do work:
Where are your helpful answers? You didn’t even manage to reply to my questions. So how helpful is what you write in this forum? Instead, I get labeled as an “anonymous advisor.”
€, you should ask yourself what kind of forum this is!
How many “building experts” are there here? I think you should switch to another forum because there’s no free lunch. However, I can’t imagine your approach (for acquiring clients) would be better over there?!
As I understand it, this forum is a place “by users for users.”
So ANONYMOUS ADVISORS, of course without liability, share their experiences.
What you’re doing is not helpful advice; it’s just a clumsy marketing tactic.
If I am mistaken in my opinion, then please delete my account.
Quote:
Anyone who truly understands a bit about the whole business will hardly bother participating in forums.
Unfortunately, only a few people look beyond their own perspective! Otherwise, the forum would be flooded with professionals
As I said, in the other forum, free advice is rarely given, but at least you get answers from experts!
The vast "majority" are usually ignorant,
Sorry, but the customers who fall for your scheme are the ones being ignorant.
Every now and then, free tips do work:
How pointless—to do that when, if at all, well-planned systems account for less than 1% of annual heating energy demand! Peanuts within the overall balance.
For new builds, you usually have to buy an uneconomical solar thermal system for domestic hot water alongside a gas condensing boiler, which is awful.
With gas condensing boilers, consumption is always higher than demand; with air source heat pumps, it’s the opposite.
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