Best Of
Re: Air to Water Heat Pumps
There is also way too much focus on hydraulic separation and not enough on what actually matters. This is getting enough flow through the AWHP under all conditions and never mixing down supply water. Hydraulic separation fixes the first but very easy to screw up the 2nd.
I'm also with @DCContrarian if you add up the BOM cost off all the non AWHP bits in any of those diagrams you are probably talking at 3x the cost of the heat pump. Except for very high end builds, that simply does not work.
I'm coming around the same conclusion as well. If you want air to water for floor heat, best option for cooling and supplement is a ducted heat pump. Regular HPWH for hot water. It is still expensive but now not out there. The bad news is you will not get that blinged out wall of copper pipes and valves.
Kaos
Re: How to pitch this beast radiator
@delcrossv @EBEBRATT-Ed you and everyone else were correct. I had to restrict, but by doing so, it threw off other radiators in different rooms. Which tells me that maybe I do have a venting problem at the end of the line in the basement?
Re: Smart Thermostat With Steam Heat
That is not the correct wiring configuration for that control. I will be happy to offer you a correct wiring diagram. Please stand by.
Re: How to increase my delta T
YES, You can get 14% more radiators in each room. That would be a project.
You could increase the radiator output by increasing the water temperature in the radiators by 14% … much easier in my opinion. What is your high limit set for on your boiler? If it is 180° then set it to 190° on colder days. Are you using any type of outdoor reset to reduce the radiators temperature on milder days? If yes, then adjust the reset curve.
Re: Monoflow system does not heat well
I could be wrong but I am not sure delta T is the whole answer here. I think we can all agree that the flow in the main determines the flow through the branch piping with a monoflow system. Low flow will cause low baseboard output. You need the venturi effect to get flow through the branch and you won't get that with low flow
This is why I two of my posts above I mentioned taking temps in and out of the baseboards and getting pressure increase across the circ. That pressure converted to head even if the gauge readings are a little inaccurate will tell the story
Re: Mod Con Boilers Ranking
This is the main issue with anything hydronic. That 3 way valve costs about 10% of a modcon cost. It is very easy to add a couple more items like that and really blow the budget. Unfortunately any hydronic bits in north America are priced silly so you have to really watch how you are plumbing things up.
Kaos
Re: How well is my heating working at lower water temps?
Hydro coils are hard to dial in. What I have found works is once you get your outdoor rest in the ballpark is try reducing the water flow rate through the coil. Up to a certain delta T, the heat output (ie supply air temp) does not change much but you get much lower return water temperature which is what matters for condensing efficiency.
Kaos
Re: How to increase my delta T
what temperature water are you sending to the radiators? Increase that to increase the radiators output.
hot_rod
Re: 1953 baseboard identification ?
I don't know the mfg but all baseboard is pretty much the same around 550 btu/foot at 170 avg water temp 180 in 160 out.
Re: Primary Secondary Flow Direction
Its piped wrong the supply and return at the two closely spaced tees need to be swapped.
I don't get what the zone valves have to do with this. If you reverse the zone pump you would have to reverse the zone valves. That is more work than swapping the two pipes.