INSTANT WATER HEATER INDIRECT WITH DOMESTIC PRIORITY
I can not recommend many online suppliers but some of the ones I can are:
These are people I have worked with, they sell quality products, for the best prices and stand behind what they sell.
They will also give you 5% off on purchases if you use code Fred Seton for a reference.
THE BEST TANKLESS HEATER IS THE TAKAGI, SEE
I have used these in my radiant designs since 1995, I have three of them, one in my boat, one in my bus and one in my home to back up my wood burning boiler.
Not all instant water heaters are suited for this application.
For custom radiant packages see,
This is a simplified example drawing of equipment plumbing.
Our custom designs include part numbers, suppliers and are specific to your requirements.
We design to match your specific construction style and heating requirements.
We also give you phone and email support through the installation and after, if needed.