My Furnace Turned On!

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JOD

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Yes, this is my furnace. I remembered seeing a thread on here about furnaces, so I had to go see if this thing was running! Sure enough, it still works...

When we bought this palace is was literally falling down. So, the first order of business to to jack it up in the air and frame in a new bottom story (it previously had a 5 ft basement--now it's a full 8 ft). It's on a grade, so the front of the house is about 3 ft below ground, the back is at ground level.

The existing ductwork was (poorly) retrofit to the house, so I decided to install radiant heat. Of all of the boneheaded thing I've done, this wasn't one of them! I had zero experience on the subject, but it went almost without a hitch*. There's PEX in the 6" slab to heat the new story, and then more PEX run in the joists to heat the upstairs. Running the PEX through the joists in the dead of winter wasn't fun (it's not very flexible). Besides that though, it was pretty straightforward. Those gravity pumps hook into the thermostats. The water is heated by an expensive water heater that has a higher recovery rate than normal. It's the same water heater that heats the house's hot water, so it's an "open system", meaning that water is always flowing through the system even when the heat's not on--so there's never any need to flush the system.

Overall, I'm totally pleased with it--no maintenance, no noise, it provides a very even heat, it's been cheap to operate and the best part: no dust being thrown around by air coming from the ducts. Given the number of furry animals around the house, this is a huge plus...

*one snag I did have along the way. They aren't kidding when they recommend 60PSI to the system. I also put in a new water line and before I had the pressure regulator hooked up, I had about 100psi coming to the system. One of the PEX connections let loose while I was sleeping! Fortunately, I hadn't finished the room yet....

So, how common is this stuff? Does anyone else have this in their house?
 
So you heat your house with a tank-less hot water heater ????
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and if your asking how common is PEX, it's very common.
I do plbg n htng work on the side and we use a ton of PEX for almost any application, I am also remodeling (slowly but surely) our house and everything that gets replaced gets PEX.

We have been using our new heat pump so far this year and WE LOVE IT, it's a ductless setup with wall units inside (Fujitsu mini-split) Our main heat is radiant hot water and we were not about to retro duct work into a 100 year old home.
 
No, not tankless--though if I were doing this now, I probably would go tankless--I think (??) they've gotten better since I did this project.It's a conventional tank water heater, just more efficient than a standard tank, with a higher refresh rate.

I did this around 10 years ago, and at the time PEX seemed really uncommon. There were only 1 or 2 supply places locally that had fitting for it. I'm not surprised that it's now seeing a lot more use in general plumbing applications.

I did CPVC for the regular plumbing, and in retrospect I kinda wish I had used PEX for that as well. At the time, everyone seemed afraid of it...
 
Congrats! Our house is on hydronic radiant in-floor heating and it's been very sweet (warm, no dust, etc.) esp. during the past weekend when the nasty PNW storm hit (prolly hit your area just as hard)...

Watchout! Another one coming tomorrow (according to weather forecast).

Q.
 
If you are inferring to that white pipe in your picture that is not PEX but CPVC. I think its dreadful stuff. I needs good support and does not take flexing very well at all.

I did not think it could take high temps well with the glued joints.

PEX is great though.
 
Originally Posted By: rjundi
If you are inferring to that white pipe in your picture that is not PEX but CPVC. I think its dreadful stuff. I needs good support and does not take flexing very well at all.

I did not think it could take high temps well with the glued joints.

PEX is great though.


Yeah, the plumbing coming right out of the manifold is CPCV. To be honest, I wasn't sure how the PEX unions would hold up so I tried to avoid them as much as possible. As you can see there are a bunch of turns around the manifold/pump area, so I went CPVC. It unions to the PEX just out of camera.

The glued joints hold up fine--threaded CPVC joints are where you can run into trouble with heat. The heat running through is only 120 degrees, as required by the place who supplied the materials for the heat--so it's well within the range for a glued joint for CPVC.

I went back and forth over the whole copper vs. CPVC for the house plumbing, and ended up doing CPVC. I'll admit that part of it was convenience--it was easier for me to do. The other part was that I did the actual house plumbing in the summer, and frankly I was worried about burning the house down sweating joints in 100+ year old, dry fir timbers which comprised the framing. If I had it to do over again, I'd have used PEX for everything, but at the time it was pretty uncommon technology and I didn't trust the fittings.
 
I think I have a 25 foot run of PEX. The rest of the house is 1/2" copper. I have renovated and added much over the yrs. My technique has improved over the yrs and I even was a plumber's helper for a time. I do OK with PVC drain pipes too. My warm air furnace does ok.
 
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