Compatible Hot Water Tanks (US)


#1

I’m building a new house this Spring and am in the market to shop for water tanks. I’m probably going to get a 40 gal electric tank but I’m curious what others are doing to integrate the use of HestiaPi with their water tanks. I’m going with a tank unit because I hope to integrate a solar pre-heater Summer of 2019.

What tank brands are compatible with HestiaPi in the US?

Cheers!


#2

Not sure about how to reply but I will reply with a question :slight_smile:
As HestiaPi is open source why don’t you see what commercial tanks are expecting from a thermostat to do and see if we can incorporate this together into your installation? Sounds like a fun addon to us!
You might as well find what cool features expensive ones have to offer and see if we can match that!
What do you think?


#3

Sounds good to me! I’ll keep looking and see what I find. And maybe someone on the forum can add a thing or two. I’ll check out the Openhab forum as well. I’m confident that we can come up with a great solution! I’ll keep you posted!

Also, when I’m done with the house build here late August, I’ll take some pictures of the finished product installed. I’ll see if I can come up with some documentation for your WIki as well. I saw your wall install section needed to be created. :slight_smile:

Cheers!


#4

What country are is the HestiaPi project located in?

What exactly are you all in EU hooking up to your HestiaPi to control the hot water boost?

I see a lot of products on the market that you can add to your existing hot water heater to boost it’s efficiency but I do not see anything that says you can hard wire a controller to your existing hot water heater to boost it’s temperature. I will speak with my plumber and see what he has to say. Thanks!

Cheers!


#5

Siemens-thermostat
This is a typical thermostat that gets replaced by HestiaPi in the EU. It has a separate electrical contact for heating (controlled by the thermostat value) and hot water. The heating element can be either gaz or electrical and has a temperature preset that is not adjusted by the above unit (rarely people change the temperature the hot water needs to be).
With HestiaPi we can add a wired or wireless temperature reading or setpoint to the water system…


#6

So, I am back at it again tinkering. I was going to create my own thing and then thought that HestiaPi may be able to accommodate what I am after. I would like to integrate 3 temperature sensors and a relay into a HestiaPi based system to control a simple water pump based on temperature readings. Basically, their will be a sensor installed inside of the solar collector and inside of a collection tank and one reading outside temperature. When the temperature of the solar collector reaches a set point, the pump engages. When the temperature of the tank hits a set point, the pump quits. If the temperature of the collector drops below a set point, the pump quits. It’s really not that complicated. :slight_smile:

I have a board design I am debating on. I may use it and then use HestiaPi to control it all. I have two basic designs. One with an LCD screen / buttons and one without.

The link below shows the DIY system I am building. I want to replace the commercially available controller with the one I build instead. Also, to my knowledge their aren’t any good commercial options out there that have a web interface like HestiaPi / OpenHab does.

https://www.builditsolar.com/Experimental/PEXColDHW/TankConstruction.htm#Controls

Cheers!

Joe


#7

Cool setup (link does not work)! Sounds like a simple modification to the default.items and default.rules files.
If you need assistance simply shout here or the OH forum.
Replacing commercial controllers to custom made ones is a milestone on its own :wink:


#8

I will definitely let you know how it goes. Still designing things now. I just got my temp sensors and relay shipped today. A new RPi zero will be here soon as well. Now it’s time to decide on board customizations. I’m having fun with Fritzing at the moment.

Cheers!


#9

It’s funny that link didn’t work. Try this one. The one above worked fine for me in Chrome browser.

https://www.builditsolar.com/Experimental/PEXColDHW/TankConstruction.htm#Controls