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Tank size?

I was just asked to hook up the radiant floor heat in a partially finished home. Apparently towards the front left area of this house it has concrete slab floor covering a 16 x 20 room with a 12’ ceiling. In the crawler two 1/2” pex lines stub into it. A supply and return.

He has a 50 gallon electric HWT and an electric tankless (that I don’t have the make, model etc on) in the laundry room about 15’ away from the room with the slab. The load on the hot is two full baths, clothes wash., kitchen sink w/dishwasher. Can I use the 50 gallon tank for the heat too?

Re: Boiler/Pipefitter Training/Certification Courses?

I did not know that boiler service and pipe fitting courses were a "top secret" study. Sorry for my ignorance.

Re: 3 Season Room idea

Bob,

That's too simple! I'm trying to make it as complex as possible!

Re: Boiler failure mystery solved using the pump curve, this weeks video

@lrccbj The manufacturer would never lie to us. 🤞

@hot_rod Youre right about primary secondary not being the foolproof when low water is returned. The boiler bypass valve has not been one of my favorites unless you have a constant temperature boiler

On instances where I am concerned about low return water temperatures, I used a thermostatic mixing valve like this one. It's filled with wax and factory set for 140 degrees. If the water temperature is below that, it opens and mixes supply water temperature. It seems to work well and there is no field adjustment.

IMG_2605.jpeg

Re: Constant Circulation Piping Layout

@ https://forum.heatinghelp.com/profile/hot_rod Thanks…was hoping to keep you talking till your post count tipped 25K but looks like it’s not gonna happen.

I’ll take a shot at answering my own question re the harm of extra checks…any device has the potential to malfunction and cause issues over the years of pumping so keeping it as simple as possible is often best. If it floats, flies or flows you’re gonna have problems. 😀

If anyone sees any problems or improvements I’d be grateful to hear about from the perspective of your experience. Thanks to everyone who has commented.

Re: Classic Hydronics Seminar

@dpenny you can PM him but Dan is happily retired. Maybe you can lure him out😊

Re: RESIDENTIAL PLUMBING WATER ROUTING METHODS OF THE DEAD MEN

I can't picture what your doing but don't run it in an outside wall. The cement may be fire stopping or plaster that was pushed through the lath and fell to the botton of the joist bay. Ask me how I know. I got an auger bit stuck in the plaster at the bottom of the joist bay and fought that for 1/2 an hour trying to get the bit out with plaster raining down on me on a 90 degree day. Then when I got the bit out the Romex was hung up on the plaster. After a few more holes and the house looking like Swiss Cheese I gave up and took another route.

Short and direct is better if Pex is a no -no you could use soft copper.

@Mad Dog_2 That"s because in Ireland they don't use much water, our forefathers relied on beer.😂