Best Of
Re: Help me calculate pressure drop!
If I added it right you have roughly 60' of pipe. With 140000 btuu you should have 1" all the way, thats the way it would be if piped properly.
you have 6.0"wc now at the meter and the boiler needs 5.0". I don't know if increasing the last 6' of pipe will help but it should.
You should also be combustion testing the boiler if you playing with the gas pressure.
Why are you increasing the firing rate ? Does the boiler heat the house now?
Re: Bit the bullet: bought an HTP UFT-100W on ebay
Fair price IMO. I was paying about $1800 for a 100W in 2019 when I stopped using them but as long as you don't have all low temp radiant or need any tech support, they're a pretty good boiler. As was mentioned above, I'd probably just install one with unions and keep the second for parts/spare rather than a cascaded system but you're welcome to do as you please.
GroundUp
Re: Can someone explain this hydronic loop heating.
@Lid431, saddle valves? For real? Complete with 1/4" tubing for easy bleeding? 🤪
HVACNUT
Re: Replacing cast iron radiator with smaller one
A kickspace heater, or any heater with a fan may just spread the airborne lint further into the home.
If anything some UltraFin below.
hot_rod
Re: OT: Underground Wiring Options
If your not going to have a charger run the larger PVC pipe and pull #12 for the 20 amp breaker. The new owner can pull the charger circuit or the sub panel. Only install what you need but you have left provisions for an upgrade if needed.
A garage can only have 1 circuit or 1 multiwire branch circuit. More than that and you open yourself up to ground rods, sub panels and more unneeded cost and issues you don't need if your not using the increased power.
Re: Boiler wiring tips
Step 1 Understand the basic electrical circuit. Source > Control > Load > Return path to source
This is a basic electrical circuit.
- Source = two 1.5 volt batteries
- Load = light bulb
- Control = manual switch
- Return path to source
Note that the load and control can be reversed. The load can be on the Source side or the Return Path side of the circuit.
From that basic understanding of electricity, you can build any analog electrical control circuit to operate a boiler.
Re: Boiler wiring tips
Go very slowly and know when you need to bring in help. It takes years to get really good. Mad Dog
Re: Bit the bullet: bought an HTP UFT-100W on ebay
Whether or not it was dumb depends on how the boilers arrive! Certainly if you get 2 new boilers for that price then you got a great deal. Personally I think I would install one and just save the second one in storage. I think the system would be overall more efficient with a single right sized boiler, slightly simpler piping requirements as well so less that can be messed up. Also 2 vents means twice the chances to recirculate flue gas, keep those intakes far away from the exhaust
GGross
Re: OT: Underground Wiring Options
for the cost difference in the larger PVC, why not leave the option for a 50 or 100A upgrade?
1-1/2” PVC would be my suggestion
I believe 18” burial, 12” under driveways is how the code reads
I put yellow caution tape in the trench a few inches above the conduit
hot_rod