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Description
alfa ii pelletketel met centrale pelletbrander 12 17 kw subsidie geschiktLandelijke Inbedrijfstelling en montage via klantenservice op aanvraag mogelijk! Levering geschiedt met vrachtwagen en hoogwerker tot stoeprand! De ketel voldoet aan de eisen van de BlmSchV2 en bezit de CE conformiteitsverklaring. ALFA II Pelletketel met centrale pelletbrander, eersteklas uitrusting voor maximaal warmte en bedieningscomfort Kenmerken van de Alfa II De Defro Alfa II heeft een compacte ketelopbouw met optionele uitbreiding van het
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Landelijke Inbedrijfstelling en montage via klantenservice op aanvraag mogelijk! Levering geschiedt met vrachtwagen en hoogwerker tot stoeprand! |
ALFA II – Pelletketel met centrale pelletbrander, eersteklas uitrusting voor maximaal warmte- en bedieningscomfort
Kenmerken van de Alfa II
- De Defro Alfa II heeft een compacte ketelopbouw met optionele uitbreiding van het pelletcontainervolume (PLUS-uitvoering).
- Standaard met automatische warmtewisselaar reiniging en asafvoer.
- Centrale pelletbrander voor efficiënte brandstofverbranding. De automatische branderreiniging zorgt voor een betrouwbare ketelbedrijfsvoering.
- TSS Twin Spark System – twee afwisselend geactiveerde ontstekingselementen.
- Keramische omleidplaten boven de verbrandingskamer. Staande buiswarmtewisselaars met wervelgeneratoren voor maximale energieopbrengst.
- Onderdruksensor voor het waarborgen van de benodigde onderdruk in de verbrandingsruimte.
- Krachtig trekventilator voor benodigde onderdruk in de verwarmingsketel en stabilisatie van de verbranding.
- Intuïtieve en zeer eenvoudige bediening van de verwarmingsketel dankzij de moderne APC Center bediening met touchscreen, die 6 pompen en twee verwarmingscircuitmengers bedient en is uitgerust met een fabrieksingebouwd internetmodule.
- Een professioneel ketelaansluitpakket incl. retourverhoging, ketelcircuitpomp in leveringsomvang.
- Vulstandsensor in de pelletcontainer voor weergave van de brandstofreserve en onderbreking van de bedrijfsvoering, zodat de transportschroef niet leegloopt.
- Optioneel kan een lambdasonde worden nagebouwd, waardoor de verbranding nog efficiënter en milieuvriendelijker is.
- Bediening APC Center met touchscreen, die 6 pompen en 2 verwarmingscircuitmengers bedient,
- serieel met ingebouwde internetmodule
- Touchscreen APC CENTER, Bediening APC CENTER,
- Internetmodule,
- PID-functie,
- Weersafhankelijke verwarmingscircuitregeling,
- TSS-ontstekingsautomaat,
- Pelletbrander met automatische reiniging,
- Hydrauliekset met retourverhoging en ketelcircuitpomp,
- Verstelbare voeten
- GSM-module,
- Module I-1,
- Module I-1M,
- Lambda-sonde met module ST-69,
- Internetmodule WIFI,
- Kamerthermostaat ST-292 v3,
- Kamerthermostaat ST-292 v2,
- Kamerthermostaat DEFRO SPK Lux,
- Draadloze kamerthermostaat SPK LUX,
- Set voor draadloze RS-communicatie, Versie PLUS – vergroot containervolume
Technische gegevens van de Defro Alfa II
Alfa II 12 kW
- Nominaal vermogen: 12 kW
- Vermogensbereik: 3,2 - 12,2 kW
- Brandstof: Pellets ø 6 mm
- Rendement volle belasting/deelbelasting: 90,7% / 91,2%
- Energie-efficiëntieklasse: A+
- Inhoud pelletcontainer standaard/plus: 85/145 kg
- maximaal toelaatbare bedrijfsdruk: 3 bar
- benodigde schoorsteentrek: 8 Pa
- Rookgastemperatuur: 106 °C
- Rookgasmassastroom: 9 g/s
- CO2-gehalte: 10,7%
- Ketelgewicht standaard/plus: 357/372 kg
Alfa II 17 kW
- Nominaal vermogen: 17 kW
- Vermogensbereik: 4,9 - 17,1 kW
- Brandstof: Pellets ø 6 mm
- Rendement volle belasting/deelbelasting: 90,7% / 91,2%
- Energie-efficiëntieklasse: A+
- Inhoud pelletcontainer standaard/plus: 85/145 kg
- maximaal toelaatbare bedrijfsdruk: 3 bar
- benodigde schoorsteentrek: 10 Pa
- Rookgastemperatuur: 119 °C
- Rookgasmassastroom: 13 g/s
- CO2-gehalte: 11,2%
- Ketelgewicht standaard/plus: 373/390 kg
Pelletverwarming een beter alternatief in veel bestaande woningen
Verwarmen met pellets of een warmtepomp?
De keuze tussen een pelletketel en een warmtepomp hangt af van verschillende factoren, waaronder de individuele behoeften, de lokale omstandigheden en de economische overwegingen. Het budget voor een nieuwe verwarming in een oudbouw woning is vaak niet toereikend voor een warmtepomp, omdat de investering gepaard gaat met meerdere vervolginvesteringen. Moeten radiatoren worden vervangen, of moet het huis worden geïsoleerd, of misschien moet een PV-installatie worden gemonteerd zodat de warmtepomp efficiënt kan werken, dan stijgen de kosten aanzienlijk en kunnen zich in veel bestaande huizen op de lange termijn niet meer terugverdienen. Pelletverwarmingsketels kunnen eenvoudiger en economischer in een bestaand verwarmingssysteem worden ingebonden, wat de aanschafkosten gematigd maakt. Onze moderne verwarmingsketels zijn zeer efficiënt en bieden een gelijkmatige warmteafgifte onafhankelijk van de buitentemperaturen. Het is raadzaam om met een van onze verkoopadviseurs te spreken om de beste optie voor uw huis te bepalen.
Een pelletketel werkt vergelijkbaar met een gas- of olieketel, maar dan met houtpellets als brandstof.
De pellets worden via een transportschroef naar de brander gevoerd, waar ze worden verbrand om warmte te genereren. Deze warmte wordt vervolgens door een warmtewisselaar geleid, die het water in het verwarmingssysteem opwarmt. Het verhitte water wordt dan via leidingen naar de radiatoren of vloerverwarming in het huis geleid om de ruimtes te verwarmen. Een elektronische regeling zorgt ervoor dat de brandstof in voldoende hoeveelheid naar de brander wordt getransporteerd en de verbrandingsluchtaanvoer automatisch wordt gereguleerd om de efficiëntie te maximaliseren.
- Milieuvriendelijkheid: Houtpellets zijn een hernieuwbare brandstof en hebben een lage CO2-footprint in vergelijking met fossiele brandstoffen zoals olie of gas.
- Efficiëntie: een pelletketel is zeer efficiënt en kan tot 95% van de brandstof in warmte omzetten.
- Kostenbesparing: Houtpellets zijn doorgaans goedkoper dan olie of gas, u kunt met onze pelletketels op de lange termijn geld besparen.
- Gemak: Pelletketels werken automatisch en sommige modellen volledig automatisch en vereisen weinig ingrijpen.
Pelletketel en milieuvriendelijk verwarmen!
Vanuit het perspectief 'milieuvriendelijk verwarmen' zijn pelletverwarming en houtverwarming nog steeds een uitstekende keuze. Hout geeft bij verbranding zoveel koolstofdioxide vrij als het tijdens de groei opneemt. Het geldt daarom als klimaatneutrale brandstof. Hout is voortdurend aangroeiend en dus ook duurzame grondstof. Onze hout- en pelletketels zijn daarom ontworpen in overeenstemming met de geldende emissierichtlijnen en voldoen aan de strikte bepalingen van de geldende BImSchV.
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4.7 ★★★★★
Based on 1366 reviews
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Product Reviews
★★★★★ 5
Good all around design with plenty of functionality; best design especially for this price. Very comfortable ergonomics.
Color: Black
The ergonomics of this keyboard are very helpful. I've purchased this same keyboard many times over the years (they wear out). It takes some getting used to, but I love it. It's a more natural position. I'd like it better if there was more space between the two sections of keys, but I would assume they were trying to keep the footprint similar to a regular keyboard for space reasons.
This made a big difference in my neck and shoulder pain and I don't experience any wrist pain like I do when using other keyboards.
I don't know if they still make the wireless version, but I can't recommend that as it wears out even faster than the wired keyboard. And that leads me to the one real drawback - they wear out too quickly. Usually the letters on the keys wear off first, which usually isn't a big issue since I don't look at the keyboard much, but when I do, it's a pain that the keys no longer show the some of the letters. The keys themselves begin to wear out. It seems to me it happens faster than it did years ago. They used to last a few years before they keys stopped responding well (nothing happens when you hit the key and then suddenly you get a jumbled mess), but in recent years, it seems like I need a new keyboard every two years. I suppose that's one way to make sure your product continues to sell. Also, initially the keys are fairly quiet, but it doesn't take long before they're quite noisy.
In comparison to other ergonomic keyboards, this one has the best design in the lower price range. Others with better designs run into the hundreds. I highly recommend this keyboard.
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Reviewed in the United States on July 13, 2017
★★★★★ 5
1 Year Later....Still going Great
Color: Black
Ok, I have had this keyboard since June 28, 2015 and today is July 4th, 2016.
Having thought about this keyboard over the last year and then swapping it out for a standard Dell (non ergonomic) keyboard for the last two weeks has made me realize a few and not so few obvious things:
1) Footprint of ergonomic keyboard on desk is larger than most that I can recall. Not a con but keep that in mind if your computer desk is on the smaller side
2) Build Quality. You buy a top tier (Microsoft, Dell, Lenovo, HP, etc) business OR retail keyboard for a decent price, one EXPECTS minimal issues. There are two issues that have cropped up over the course of the last year: a couple of the tabs holding the snap on palm rest have broken off. The palm rest/riser plastic piece is still firmly attached. My guess is that these plastic clips were put in high stress areas. No loss in functionality. The CAPS LOCK LED light that is in the middle doesn't really work anymore. If I hit the caps lock with my left pinkie finger, the light doesn't come on. If I smash the same caps lock with my thumb or index finger, the light comes on and then goes out. Windows 10 always tells me via the popup message if my caps lock is on. No loss in functionality.
3) Key labels have not worn off. The letters are a bit faded but are still clear. The number row above the keys are virtually pristine (and by extension are used for the comparison of the letter keys).
4) This is a very good ergonomic keyboard. Within a couple of days of the swap, my wrist and left finger were starting to have that familiar hurt.
I could go on and on about the specifics that some have posted in other reviews, but I feel that this is relevant to my use after a full year
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Reviewed in the United States on July 4, 2016
★★★★★ 1
IMHO: Expensive torture for thumb, hand, and arm
Color: Black
I should have paid more attention to the clearly reasoned (and IMHO *accurate*) negative reviews. After about one week of not-very-intense use I had to stop using this apparently well made but horribly designed keyboard. The use of my right hand and arm became painful. There were three main problems:
#1 The amount of thumb pressure required to actually register the "space" key was way too much to type with any comfort or confidence. Even if I concentrated on always striking the space key so that a space would be inserted into the text or computer code where needed, I found that about 1-in-12 or 1-in-14 attempted spaces would not be inserted. It is terrible that part of one's brain must focus on striking the space key with heavy force; it is even worse that one must proof read each page of text or code to ensure that spaces have been inserted where needed.
#2 The space key is intrinsically badly designed anyway, because one wants this key to be equally welcoming to both the left and right thumbs. It isn't. I found that my right thumb worked best, requiring unnatural contortions to ensure spaces were inserted where needed.
#3 In general, I found that the $10 keyboard Dell included with my latest XPS desktop requires a more comfortable amount of force for ALL of the keys, not just the space key. This could be because the Microsoft Ergonomic Keyboard 4000 for Business requires greater downward movement of the keys for a stroke to be registered.
Problems #1 and #2 are so severe that I found this keyboard simply unusable. This is quite an indictment for a way-above-average-cost keyboard that is allegedly designed and built with proper ergonomics in mind. I am astounded that so many users find this a comfortable keyboard. By the way, during more than half of my PC and computer keyboard use, which dates back to the late 1970s, I have actually used (and preferred) Logitech and especially Microsoft ergonomic keyboards. This is the first ergonomic keyboard I have ever used that I have found to be a thinly disguised implement of torture for thumb, hand, and arm.
I now have some appreciation for the feelings of the other one-star and two-star reviewers when they read the patronizing remarks of the many keyboarders who find this device comfortable. Some seem to pooh-pooh (usually in patronizing terms) those of us who find this one of the most wretched keyboards we have ever encountered. It is a little hard to believe we sufferers happened to receive slightly defective devices. The complaint I offer can be found too often in the reviews for our complaint to occur as a result of a minor or rare manufacturing defect.
On the plus side, the build quality appears to be terrific.
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Reviewed in the United States on November 10, 2013
★★★★★ 5
High quality stand
Style: Swivel Base, Color: Silver, Style: Swivel Base, Color: Silver
The mStand 360 is an amazing stand. I love how it is built from a single piece of aluminum and looks amazing on my desk. It fits my Macbook Pro 15" extremely well and raises it up to the height of my monitor easily. Not only does it help me improve my posture, but it also neatens up my desk significantly. I can easily fit an external keyboard under my Macbook when I am not using it, clearing up space. The hole in the back is also useful for bunching cables together that go directly into my Macbook, keeping my cables off the floor when I take my Macbook to go somewhere.
The stand feels very stable, with no chance of my Macbook falling off. The aluminum C shape does have a slight bend on it if you put extra weight on it, but all in all, it feels very sturdy. The rubber padding on the stand also keeps the stand from scraping or damaging any part of my laptop and I feel very comfortable trusting the stand with my laptop. I would not recommend typing on a laptop keyboard while it is on the stand, but it works great with external keyboards.
The swivel feature met my expectations, allowing the laptop to be easily turned. Thankfully, it was not too easy to turn and my laptop does not turn itself when in the stand. It is a nice feature to have, especially because I paid only 5$ extra for it (the price for the swivel stand seems to have increased since then).
I am very happy with my purchase, even though it did seem a little expensive. I am wholly satisfied that I spent the extra 20$ to get a great laptop stand that will probably last for years.
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Reviewed in the United States on August 18, 2016
★★★★★ 5
This stand is just perfect!
Style: Swivel Base, Color: Space Gray
I first started looking at stands when I learned that staring at a laptop for hours can cause back injuries.
So, I got the idea to use a stand, at home. This stand allows me to have a keyboard and mouse and use my laptop as a glorified desktop with a smaller monitor.
I was astonished at the quality of this stand. It is better built than it needs to be, but I am not complaining at all about this. Let's face it, we spend a lot of money on our laptops, and you want to have a great platform to sit your laptop on.
I love the ability to swivel the stand. My desk is very close to a window that lets in a lot of the sun at certain times of days. This would result in a glare if not for the ability to spin my computer ever so slightly in either direction to combat this problem.
Also, it is a great cable manager with the hole on the back of the stand that makes everything look cleaner and more organized. The color matches my MacBook perfectly and looks like it is an Apple product.
Summary:
Great product. High quality. Looks great. Swizel is impressive and useful.
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Reviewed in the United States on April 18, 2018
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