fredericponcet wrote:Forhorse wrote:What I'm going to say may be silly; but with a delta of 90 ° C and if it is for "only" 50W, it wouldn't be easier to use Pelletier effect cells?
To complete my previous message, based on these products:
http://www.hi-z.com/index.php
I estimated the cost of my installation to more than 500 € (not counting the DC / AC converter needed to run the circulator).
I may end up adopting this solution while waiting for better, but, for once, I think it's a bit expensive W. Now it is true that it is durable, reusable on any boiler and that the cost of kWh in the long run can become very interesting ...