Questions tagged [hydronic]
The hydronic tag has no usage guidance.
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Will I have condensation on a slab cooled with groundwater?
New Construction, SLAB COOLING
I’m planning a 24’ x 24’ two story studio with guest quarters, kitchenette & bath. The first floor heat will be an insulated concrete slab with PEX, boiler ...
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Boiler heating, but no water flowing through system
My heating system stopped working this morning. It's an oil-fired hydronic system with 5 zones and hot water tank. This is what I have diagnosed so far:
The thermostats are calling for heat.
The ...
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Nervous About Hydronic Floor Heating
I recently installed electrical floor heating in a bathroom and I can set the temp to 90+ and it gets nice in there on the tile.
My plan in our new house is to put radiant hydronic floor heat ...
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How can I move a new heavy boiler to the basement and the old one up and out?
I need help moving a new boiler into my basement and to have the old boiler removed from my basement. It will be a warranty return less than 1 year of use so the old one must be kept intact. The ...
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How to increase flow without causing cavitation in hydronic heating system
I have a hydronic heating system in which water heated by a boiler is pumped around the perimeter of the house using circulator pumps. Currently the flow rate is too low, causing the boiler to ...
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How do I completely drain and decommission hydronic radiant heating system?
Purchased a home which has a floating floor radiant heating system installed in the basement. I am looking to remove the system as it was poorly designed and installed. I've closed off the fresh water ...
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No water in circulator pump? Hydronic heat with electric hot water
I noticed my hydronic floor heat was no longer heating, and the circulator pump was extremely loud. This system was new in 2009 with one valve, pressure tank, and electric boiler replaced in 2021.
It ...
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Oil boiler, remove baseboard from entire house but keep the water heater
I have a question about removing Hydronic Baseboard but keeping the boiler and water heater in place.
Is this relatively straight forward?
Shut off power
Cut off the supply and return for the ...
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454
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Hydronic heating system uses ONE line for supply and return?
Have just bought a house in which we've inherited a hydronic system - so just beginning diagnosis and diagramming, etc.
It seems that radiators use only one line for both supply and return; presumably ...
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Radiant heated floor makes noise after adding additional 1/2" of plywood
I have installed hydronic radiant heat pipes under the subfloor; used aluminum plates for spreading the heat from pex pipes.
The house is old, I think the original subfloor is 5/8 Douglas fir.
Up to ...
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422
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Hydronic heating system is not working, but still have hot water
A couple of days ago, my hydronic heating system stopped working. Thankfully, the boiler is still working though, so I still have hot water.
The details:
When no one is using hot water, the boiler ...
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Hydronic floor floor system problem
Here's a picture of my hydronic floor heating system with three zones.
A tech came out and told me that the feeder was bad. He also told me that on the controller board everything's working as it ...
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Critique my Radiant Hydronic Heating Plan
I'm planning to install radiant heating lines in my new "studio" (essentially a detached garage). I want to save some money by doing parts of the project that I feel confident with. I think ...
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I have a S-25 BF on my boiler. Downstairs is hot , upstairs -nothing. Could the impeller be bad and won't push to second floor?
I have a S-25 BF pump. Downstairs is heating fine. Not getting any heat to second floor. Tried bleeding upstairs, nothing came out. No air or water.
I have 17psi at boiler.
Could I have a bad ...
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Why is my house freezing and my gas bill astronomical?
I live in a multifamily row house in the northeast. There is a 2 bedroom, 1 bath garden apartment plus a 2 floor duplex and a basement. I am the owner and I live in the duplex, we rent out the garden ...
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Hydronic heating not working, but have hot water
I have a Navien combo-boiler system with two hydronic baseboard heating loops hooked up to it. Our on-demand water heating (showers, etc) are working fine. Both heating loops however, are not. I have ...
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Help me Understand Hydronic System Boiler Circulator RPM / HP / Head / Flow / System Pressure
Help me understand the correlation between boiler circulator RPM / HP / Head / Flow / System Pressure - see the particulars at the bottom.
CASE: My 1986 boiler came with Armstrong S25 circ (same as B&...
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Adding Runtal Baseboard to a Fin Tube hydronic heating zone
I purchased some Runtal base board heaters a while ago. I am trying to install them into an existing multi zone fin tube system. In the zone I am trying to install them I have fin tube before the ...
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What is this gray hydronic tubing and how should I work with it?
I purchased a house (built in California in 1994) with radiant hydronic floors. This tubing comes from the floors in the utility room and it appears to be using compression fittings to connect to the ...
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How does hydronic heated flooring work with hardwood?
I'm interested in putting Hydronic heated floors in a small cabin I'm building. I've done this before with tile but I really want to use hardwood in this cabin. I've seen it done before. I don't ...
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Hydronic baseboard heating and warm floors
I have hydronic baseboard heating throughout my house and have been having issues with air in the system. Since I've lived here (4.5 years) I've noticed that certain floor areas are warm where the ...
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Wifi thermostat to replace old mechanical 2-wire 110V Honeywell?
I have hydronic baseboard heating in my house, which is controlled by an old mechanical Honeywell thermostat.
The Honeywell is 110V and connected with 2 wires (black/red). There is a bare ground wire ...
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How to calculate heat loss for sizing of supplemental heat source?
If a home uses a supplemental heat source such as electric baseboard or hydronic panel radiators to raise the room temperature by 10 degrees, how do you calculate the BTUs required in a given room?
I ...
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How to balance hot-water heating system when farthest radiator stays cold
Is there a counterpart to the advice given in this video except for late 1940s-era convector-style radiators which do not have a valve on their return and have only an air-bleed-valve? Basically a ...
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Is there a way to have one thermostat control a heat pump and a 3 zone hydronic system?
I have two heating systems that are independent of each other. One is a 3 zone hydronic system with 3 thermostats controlling a pump controller. The second system is a air to air heat pump without ...
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Parallel loop in existing FHW zone - will this work?
I have a contractor renovating a space for my in-laws, and his plumber added two kick heaters and tied them into an existing FHW zone, but did it differently than I expected. I expected him to tap ...
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Hydronic, In-floor, Radiant Heat
I am considering including a hydronic (Pex tubing) radiant heat system in my new house (still in the planning phase). I have done some reading/resaerch...here was a straight-forward, mercifully ...
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Taco zone controller - blinking yellow light?
I have a Taco ZVC406 zone controller. This is the type which takes signals from multiple thermostats and uses relays to switch on the heating loop pump.
I am using a Honeywell CT87K thermostat on one ...
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Grundfos Alpha pump shows 0 GPM but consumes power and heating works?
I have some heating zones which run off a Grundfos Alpha pump which is set to the "auto" mode.
Heating seems to work fine - rooms heat up normally and this doesn't seem to take an unusually ...
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3
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Updating baseboard radiator
My house was built in the 50s and I believe the baseboard radiators are original. We just bought the house and I went to go clean them. I realized most of them are rusty and painted over making them ...
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Splitting a hydronic zone. Zone valves or separate circulator pump?
I had some plumbers take a look at my hydronic system to discuss splitting the single zone. They proposed to use separate zone pumps. In retrospect the other way to do this would be with zone valves. ...
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What should the input pressure be for a hydronic system?
I have a boiler that's operating range is 12 to 30psi.The documentation says that it loses "efficiency" at the low end of of the operational pressure range. When looking at pressure reducing ...
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What is a media guard?
I am building a simple aquaponic system by learning from this video:
https://www.youtube.com/watch?v=Lqe3IqPisns
at 1:24, we will a media guard is implemented; which is basically fat tube with lots ...
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286
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Is this typical for how hot water heating loops are plumbed?
First time owning a home with hot water heat, and studying the plumbing the basement, I notice that the living room/kitchen zone that has a run of baseboard, a kick panel unit, and several floor units,...
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What are the steps to drain and refill zone for zone valve replacement?
I have a hot water baseboard (hydronic) heating system, gas boiler. Please refer to diagram of my system below. Ball valves 1 & 2 are supply. Ball valve 3 is return. Zone valves are on supply, ...
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Replacing old 2-pole line volt thermostats in a 120V hydronic heating system - is this configuration safe and acceptable?
I am replacing several old mechanical 120V 2-pole thermostats each of which controls both a blower fan (which blows air over hydronic coils to push warm air into the room) and a single central ...
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Home Heating Efficiency
See a similar question I posted a few years ago: Heat pump minimum compressor temprature
I have a custom built new construction home, but I was not involved with the build process, so I don't know the ...
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Where Can I connect my C-wire on A Hot Water (Hydronic) Heating System?
I have a hydronic heating system (Lochnivar)that came controlled with an older (dumb) thermostat. I have 5 wires behind the wall and 5 wire in the wire packet going into heating system however only ...
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What is the advantage of a using a "Zone Controller"?
Looking at most pre-fab hydronic panels, the provide a Zone Controller. Initially I though they were used to stage the activation of the pump until after the valve was able to open but, looking at ...
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How impactful will it be to lose 7' of radiant heat pipe in a room?
My home has a hydronic heating system, with fully enclosed floor radiators. In one room, there is a radiator that runs the length of the room, on the outside wall which is about 20' long. In the ...
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523
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Can’t shut off power to heat-only (hydronic baseboard) thermostat
I have no AC in my condo, only hydronic baseboard heat, currently controlled by an old mercury thermostat. I have a new smart thermostat with a c-wire adapter I want to replace it. Trouble is, I’ve ...
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Can I replace hydronic water boiler return pipes with pex?
My house was built in the 1920s, the heating source was a hot water/radiator system. Originally the basement was probably used only for a coal furnace (we have the drop-off door that the coal guy used ...
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New thermostat for hydronic heating, no wiring labels, 3 wires
This hydronic system was not working when we bought our home. The fan would kick on with a manual switch but when you changed the temperature settings to go above the room temp nothing would happen. ...
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How do I purge the air from a hot water furnace with zones
I want to try and bleed the air from my hydronic ( baseboard ) heating system. It's a natural gas system, I think I understand the basic functionality but my system seems to be a bit unusual and I'm ...
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Boiler Valve Corrosion
I have a hydronic heating system in my house, and I noticed a valve on a pressure gauge on the side of the boiler is extremely corroded (see 3 pictures below).
1) Is there any purpose for this valve ...
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215
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Most efficient way to improve my house's heating
I live in the mid-Atlantic in a 100 year old house, and I'm looking for a way to reduce my heating bill. Last winter, I left the thermostat at 68F, and our gas bills were incredibly high, despite ...
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Calculating the feet of head for a single loop cast iron radiator system
I am trying to figure out how to calculate the total equivalent length of a loop with cast iron radiators. The pipes and fittings are easy to calculate because pipe is calculated linearly, and the ...
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Use CLR to clean stuck bleeder valve
I was bleeding the air out of hydronic heating zones and I notice some mineralization on bleed valve attached to my air scoop. I took the Schrader valve cap off and tapped the valve I noticed it was ...
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New Thermostat Won't Engage Plinth Heating in Kitchen Island
I have two plinth heaters on either side of my kitchen island. Since the rest of the house is hydronic, I presume that these are hydronic (there is a zone valve at the boiler) with electric fans ...
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How to remove a Honeywell Braukmann 104v radiator actuator
I have a radiator with a Honeywell 104V radiator actuator that I'd like to replace, I think it's P/N T104V1422. I can't seem to figure out how the thing is connected to remove it. The rest of the ...
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