Hieronder de inhoud van
het artikel op de nest website waarin uitgelegd wordt wat de nest zou moeten kunnen. Hier praat men toch echt over modulatie. Dit geeft me toch nog een beetje hoop.
What is OpenTherm and what can the 3rd-generation Nest Learning Thermostat do with it?
OpenTherm is a language that supported thermostats and heating systems can use to talk to each other. The 3rd-generation Nest Thermostat can use this language to send information to an OpenTherm-compatible heating system that will help it to save energy while keeping you more comfortable.
Through OpenTherm, the Nest Thermostat can control both your boiler’s domestic hot water temperature and the temperature of the water used to heat your home. This is important, because many older boilers have a simple on/off control: they are either on – heating to as high a temperature as possible – or off, and not heating at all. They can’t set the specific temperature for the water that your boiler uses to heat your home. However, newer boilers can use a technique called modulation to heat somewhere in between fully on and fully off, increasing or decreasing the amount of gas used to heat your home, as needed.
It’s similar to driving on the motorway – you’d normally use moderate acceleration to keep your car cruising at a reasonable speed, getting you where you need to go comfortably and on time. However, you might sometimes need to speed up to pass a slower car or to avoid a hazard. Modulating boilers work in a similar way: they can use more or less gas when it’s appropriate, to help save energy while keeping you comfortable. But something needs to tell the boiler what to do. In this case, the Nest Thermostat is the one driving. It will use its advanced algorithms to tell your boiler when it should use more or less gas.
How does the Nest Thermostat improve modulation with OpenTherm?
The 3rd-gen Nest Thermostat can make modulation even more efficient. Using its learning capabilities and advanced algorithms, it takes into account things like the current weather, the temperature inside your home, the temperature that you’ve set, and more, to tell the boiler the best way to modulate at any given time. For instance, if the weather changes suddenly and it starts snowing, the Nest Thermostat will let the boiler know that it’s time to use more gas to keep your home comfortably warm.
Do I need to do anything special to set up OpenTherm to work with the Nest Thermostat?
There are a couple of things to consider during installation so that your Nest Thermostat and OpenTherm-compatible heating system can be set up to work together properly. You’ll need to have a couple of additional wires installed to the Nest Thermostat’s Heat Link. If you’re replacing a wired OpenTherm thermostat, you can re-use the existing OpenTherm signal wires with your Nest Learning Thermostat. But to get the most from your Nest Thermostat and OpenTherm, you’ll need to have your Nest Thermostat wirelessly connected to the Heat Link. This is different from connecting your Nest Thermostat to your home’s Wi-Fi, but it’s all part of the normal setup process.
Important: The Heat Link is connected to your heating system with high-voltage electrical wires, so the Nest Thermostat should be installed by a professional.
How will I know if my heating system is OpenTherm compatible?
One simple way to tell if your heating system is OpenTherm compatible is to look for the logo on your boiler (shown to the right). The Nest Thermostat is OpenTherm compatible, so it also has the OpenTherm logo on its packaging.
If your boiler isn’t easily accessible or you can’t find the OpenTherm logo, this doesn’t mean that your boiler isn’t compatible. Contact your heating system’s manufacturer and ask about your model to make sure.
If you still don’t know whether or not your system is OpenTherm compatible, check with a Nest Pro.
Last Updated: 17/11/2015
Edit:
Hierbij ook de
link naar het Nederlandstalige artikel.
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True Radiant aan?
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Nu het issue met de Nest nog..
Hij weet 't allemaal niet zo goed meer, het arme ding...
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Beroerde website met veels te weinig informatie, drukken je een "grafiek filter functie" over je temperatuursgrafiek heen (dat noemen ze dan "statistische ruis" 
), zodat je dag-temperatuur-grafiek zo glad als een biljardlaken is, terwijl dat volkómen onrealistisch is (en overwégen een optie om het filter uit te kunnen zetten) en 't ding is nog lelijk ook 
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