Best Of
Re: Interchanging Warm Morning Heater Parts
That would be difficult to do. Maybe you would be better off replacing the entire unit
Re: Hodge Boiler Plant Photo (1890s)
Impressive!
Can you imagine the noise created from doing up all those rivets?
Pumpguy
Re: Hodge Boiler Plant Photo (1890s)
@mattmia2 I did not know that. I always assumed the steel bridges they built in the 1800's and early 1900's used the "hot rivet method" that I saw in the cartoons as a kid some fifty years ago. I think it was Bugs Bunny or perhaps it was Wile E Coyote?
Re: Loop PEX *under* joist instead of through? Reasons it won’t work?
@ethicalpaul : "How much will it lose to convection? It's not in free air, it's screwed to the floor."
Despite their name, "radiant" systems heat mostly with convection. So they do heat more readily up than down, because air rises.
The rule of thumb is that a floor will deliver 2 BTU/hr/sf for every degree difference between the surface and the room, and a ceiling will deliver 0.7 BTU/hr/sf. So about three to one.
In this installation, though, there's nothing between the plate and the space below, and a subfloor and a floor between the plate and the space above. Let's say the room is at 72F and the heating load is 20 BTU/sf/hr. The surface of the floor would have to be 82F. Let's say the floor and subfloor together are R1.5, the plate would have to be at 97F to deliver 20 BTU/sf/hr. If the room below is also at 72F that's 25F colder than the plate, which means 17.5 BTU/hr/sf going down. So you get 47% of the heat going down and 53% going up.
If the room below is a cold basement it could be even worse.
OP has clarified that there will be insulation below the plates, and drywall, which helps limit airflow.
Re: Need help with new install of radiant with Buderus cast iron boiler
The loops I see indicate you need about 4.5 gpm at design? So to do that with 4- 78W circs will be 300W. Lots of electricity to move a very small heat load :)
One pump and two zone valves less that 100W.
Pumps with flanges, iso valves, relays X 5 is what you need to VBS injection.
hot_rod
Re: Water to Water Geothermal heat pump replacement with lp boiler
I recently purchased an emporia vue energy monitor. I'm going to get it installed and at least can monitor the energy usage.
klowden
Re: Best nest thermostat-Experts recommendations to choose
@habib386 , I see that you asked about a thermostat and there are answers that did not quite answer the question that you actually asked. This can be irritating, as you have already decided that a thermostat will solve your problem. So I would tell you that the thermostat you want to use to lower your fuel usage will be a Honeywell. The name has changed to Resideo but the thermostats are the same.
Now… so you know, a thermostat can only turn on and turn off the fuel, based on the temperature set point you choose (or is chosen for you by the smart thermostat). The thermostat can not change your ductwork or your piping to radiators. If you have uneven heating as a result of a poor design or aging of the system, any thermostat you currently have, or decide to change to can not fix that problem. to make your house have even heat, you need to give more information because a duct system is adjusted differently that a radiator piping system. A steam piping system is adjusted differently that a hot water piping system.
The other suggestions are only suggestions based on your statement "i have been experiencing issues with uneven heating/cooling and it gets frustrating trying to manually adjust all the time". with this information, I can only guess that you have a single zone duct system in a two story home. This duct system may be poorly designed because the designer of the duct system tried to get cooling and heating to work in the same ducts and that is never easy.
If I am getting close to describing your system, perhaps I can help. Can you take some pictures of your heater and some of the heat outlets in each room?
Ed
Re: Need help with new install of radiant with Buderus cast iron boiler
You can’t run a slab at 120*, that’s too hot. You probably won’t need more than 100* SWT on the coldest night of the year. And you don’t need a buffer tank: the high mass of the slab is more than enough buffer.
Again, I would encourage you to read Tekmar’s essay on injection mixing. It will give the answers to your questions and also provide the info that you need but are not considering.
Ironman
Re: Need help with new install of radiant with Buderus cast iron boiler
Variable speed injection mixing is the best option. Go to Tekmar’s website and look up their essay on it for complete details.
On thing that you need to aware of is the slab over heating due to its high mass. It’s called the flywheel effect. VSIM will prevent this as well as protect the boiler from cool return water temperatures.
Ironman
Re: comms between LWCO and water feed?
Does suggest that the electronics are OK — except for the last bit which trips the LWCO. Unhappily, that relay also shuts the boiler off… so you don't have any LWCO control at all.
You need a new control.
