Granulated or aerothermal boiler house project

[killkiller]

Hello


I want to build and do not know where I turned in terms of renewable energy, the land is located at 340m I was advised against geothermal, I wanted to know what are the advantages and disadvantages of a plant with pellet boiler and an aerothermal installation? thank you

[aerialcastor]

Well already aerothermal is not a renewable energy like all systems that run on electricity.
These main drawbacks are.
-The COP drops when the outside temperature drops, basically when we need a heating system, and worse when the temperature becomes negative, an electric resistance warms the evaporator, we heat the little birds
-The PAC in general not that the air / air, increases the peak of electrical consumption, which forces EDF used the thermal power stations, and the rest of the time it turns nuclear.
-The forced air system is not what is more pleasant because of the airflow sensations.
-It is necessary to size it perfectly (and on all not to oversize it by saying "who can more can do less") to avoid short cycles, and therefore frequent starting of the compressor, which wears it out and generates overconsumption .
-The life in the air quite low, there is still a lot of back, but from what I saw, it is the compressor that would be the weak point, and that change this compressor costs the price from the pac.
- It makes noise and it's ugly.
-Ca bush, and the worst will be in the long term, (see the increase of 20% expected by EDF and it is only the beginning ...)


For pellet boilers
-It is renewable
-we can pair it with solar
-supply can be problematic, to check.


But before you commit 15 to 20k € in a heating system there is probably better to do. You should tell us more, it's new, reno, ....
Because often the best (price, comfort, ecological) is often very simple, and it is ......... attention suspense ....... to have good insulation. So first see this side if things can not improve.

[manet42]

Hello,
Last year, I had the same dilemma:
Heat pump or pellet boiler. I chose the second.

Quickly:
-Not different for the PAC, buffer tank yes or no?
- Even if it is said that it works up to -25 °, from -5 ° the yield drops sharply and we use electricity.
-If split system (air / air) it makes noise in the rooms.
-The PAC itself makes noise outside.
-Large simplicity to use and implement.
-Price of the edf in increase.
-Well choose the model..We find everything on the market. Salespeople are afraid of nothing. I got 3 quote.
For the hot. pellet.
-It is necessary for the pellet silo.
-The delivery truck must be able to reach 20 / 30m delivery ports.
-The price of pellets is not agreed, but good.
-The regulation is a little more complex at the beginning.
-The implementation is a little more complicated, call a specialist.
At home, Okofen works since the 1er April 09 and I am satisfied:
Before 2400 L of fuel
4T5 forecast of pellets (considering the 7 months, 4T).
Economy almost certain 900 / 1000 € per year.

JC

[killkiller]

Thank you for your answers! Indeed I agree with you the important thing is already to have good insulation..But do not know much in this area that advise me? Knowing that I could not isolate the outside .. I also want to put a lot of windows but I'm a little afraid that summer is too hot in the house ..

[MAMO]

Well already aerothermal is not a renewable energy like all systems that run on electricity.
These main drawbacks are.
-The COP drops when the outside temperature drops, basically when we need a heating system, and worse when the temperature becomes negative, an electric resistance warms the evaporator, we heat the little birds
-The PAC in general not that the air / air, increases the peak of electrical consumption, which forces EDF used the thermal power stations, and the rest of the time it turns nuclear.
-The forced air system is not what is more pleasant because of the airflow sensations.
-It is necessary to size it perfectly (and on all not to oversize it by saying "who can more can do less") to avoid short cycles, and therefore frequent starting of the compressor, which wears it out and generates overconsumption .
-The life in the air quite low, there is still a lot of back, but from what I saw, it is the compressor that would be the weak point, and that change this compressor costs the price from the pac.
- It makes noise and it's ugly.
-Ca bush, and the worst will be in the long term, (see the increase of 20% expected by EDF and it is only the beginning ...)


For pellet boilers
-It is renewable
-we can pair it with solar
-supply can be problematic, to check.


But before you commit 15 to 20k € in a heating system there is probably better to do. You should tell us more, it's new, reno, ....
Because often the best (price, comfort, ecological) is often very simple, and it is ......... attention suspense ....... to have good insulation. So first see this side if things can not improve.

Resistors do not heat up the evaporator

tampis for birds ....

[aerialcastor]

It's weird but it seemed good to me, it could be at a time.
Indeed apparently when the outside temperature drops, and the evaporator frost the cap rotates in the opposite direction to ensure the defrost, which is still to heat the birds.
But after that maybe it's green, bring a little heat to the poor little birds that freeze them

The air / water heat pump faces the problem of evaporator icing when the outside air temperature approaches 5 ° C and is loaded with moisture (the worst being freezing fog). The moisture will quickly turn into frost or ice and will obstruct the evaporator which will require a defrost. The losses caused by the defrosting of the evaporator are difficult to evaluate precisely because they vary according to the programming of the defrosting parameters. The energy spent on melting frost is usually provided by the heat pump which, for the occasion, works in reverse. It is not uncommon to see heat pumps with poorly tuned frost detection systems and defrosting times too long. This results in excessive energy consumption which can lead to COPs lower than 1.

Taken from http://www.abchauffageconfort.com/aerothermie.htm

[aerialcastor]

Thank you for your answers! Indeed I agree with you the important thing is already to have good insulation..But do not know much in this area that advise me? Knowing that I could not isolate the outside .. I also want to put a lot of windows but I'm a little afraid that summer is too hot in the house ..

So it's for a new project?

There are lots of things to do before thinking about a heating system. In particular, how to make sure that it becomes a supplement. It would be necessary to know in which region you are. what type of construction do you envisage, (masonry, timber frame), by a builder, archi, autoconstruction

Why isolate from the outside is not possible? If it's a question of price, well that's not the right reason . It is an urban legend (or an idea) that the ITE costs more because we have to take everything into account, and think about equal living space.
In fact, when we insulate from the inside, to keep the same living space, we have to enlarge the structural work (foundation, slab, wall) by 7% (on average depends on the geometry of the project)
There is no need to make counter partition on all the walls giving from outside (one passes the networks in the screed).
The suppression of the thermal bridges thanks to the ITE, allows to thickness equal a higher efficiency of 20% (there also average).
The fact of having an ITE makes it possible to have a good inertia (the heavy ones can store the heat), smooth the variations of temperatures, which besides an increased comfort, makes it possible to lower the power of heating.

Everyone will have understood it for ITE

For other things to do:
-a good insulation from the outside (and yes I put it back)
-a good airtightness
-a good inertia
-Orientation of the south facing main façade
-Approximately 25% of the glazed living space in the South (to be modulated according to the region)
-Safety summer overheating by caps or sunscreens in the South, limiting windows to the west, or protect by a tree or sunshade, the cap does not work on the west.
-part the rooms intelligently (living room to the south, rooms to the east, west living room, north garage)

Make a dynamic thermal study to refine the whole thing.

And at the moment you will see that you do not need a cap or a boiler but only a wood stove.

[killkiller]

In fact I had seen that some commune forbade insulation from the outside and I wondered if we could plaster like a
normal house for the suite.
I would be quite tempted by this type of insulation the price is not a brake rather invest input in good insulation.
I live in the puy de dome and wish to realize a full foot of 140m ², the parts will be well distributed (house oriented north-south) with living room on the south and large windows ..
Thanks for your advices!

[Did67]

I do not think we can ban ITE. Regulations can impose aspects, and even colors!

But we can very well plaster on an ITE (synthetic plaster), it is even what is done in general ...

The Grenelle law further reduces the limitations that services (town hall, DDE) can put in terms of energy saving (CESI, windows, etc ...).

So that should not be an argument.

I share the opinion that we must start by looking at insulation, the only investment whose profitability can only increase.

Second thing: it's only a conviction. With the price of energy that will blaze on 20 years, the value of poorly insulated homes will collapse (because the majority of people will not be able to heat them any more simpelment), while the very well isolated houses (ideally passive) will increase .

Therefore, from the strict point of view of "profitability" in "the gestin of a good father", it's a huge bullshit, a total lack of foresight, not to build much beyond current standards!

AND by the way, a very French evil to ask themselves PAC or not PAC ... while the Austrian Germans are asking the question "passive" or "positive energy" ???

[killkiller]

Thank you for your comments, I will learn a little more about insulation from the outside to know if in my area there are specialized artisans .. I think that if the budget allows me I would leave on this option
And then I would see that is the need for heating can be that a pellet stove would suffice