Navien Combi Boiler Weekend Home
Navien Combi Water Heater
At first glance I was taken back a little by the material being used in this water heater system. I have never seen black rubber hose being used in a in-floor application. It was not only the rubber hose being used but the size of the hose, 1/4" Id just does not seem like a lot of surface area to me for in-floor.
The black hose simply pushed into the copper pipe to make a manifold, the pressure of the system keeps its sealed. My research concludes that 45psi is the max these connections could hold back. We are running 12 to 20 psi.
Here you can see the older Combi-Core water tank that was used to heat both their domestic as well as there hydronic heat. The mixing valves being used appeared faulty and both expansion tanks where bad.
Navien Combi Water Heater ... cont.
Navien has really out done themselves in my book with the Navien Combi Water Heater. This unit not only heats your domestic water, but also heats your home ... all in the same box.
The Navien CH-240 tankless bolted right up on the exterior wall and really was plug and play, well of course we had to build a primary manifold and modify the existing loop to be a secondary loop ... but not to complicated.
We controlled the Navien Combi Water Heater boiler system with the new ecobee Wifi thermostat, this way my customer can change thermostat settings from a remote location. And this being a weekend home it will work out great.