The hydronic tag has no usage guidance.
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Hydronic Heating and DHW on boiler
I have Triple AQUASTAT relay L8124A Honeywell controller on my hydronic heating boiler. It is setup like this for hot water heater as well. I don't have use it for hot water, I have electric hot ...
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65 views
How to deal with shallow exterior walls (re-wiring, replacing baseboard heaters, adding insulation)?
I recently began a re-wiring project in a part of our 1950s home. The house has what I guess is a limestone block exterior. Upon taking the paneling/drywall off of the exterior walls, we learned that ...
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2answers
61 views
What's the effect of introducing bends into a primary-secondary heating loop?
I've been learning about primary-secondary boiler systems for my home, and have landed on a two-boiler system (two apartments), very much like Siegenthaler describes in his illuminating book and here ...
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1answer
49 views
cannot get last radiator on the line to heat up
All radiators but one are toasty. The cold one is up on the second floor, and is the last one on the line, farthest from the boiler.
It has been bled of air. It shoots out a thin stream of (cold) ...
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3answers
166 views
What are normally-open hydronic zone valves used for?
In a hydronic (hot water) heating system electronically operated valves control whether hot water runs through a particular zone of the building, or not.
It seems to be a common setup for the valve ...
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2answers
64 views
Difference between geothermal and regular hydronic zone valves
Taco makes two variants of zone valves - one type for general hydronic use, and another type marketed especially for geothermal use.
What is the difference in valves that particularly suits them for ...
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1answer
18 views
Where to place an aquastat that is external to the hot water tank?
If you need to retrofit an aquastat to a heating system what is the best way to do so?
i.e., in some hot water tanks or even boilers there may be a purpose-made port specifically to accept a "well" ...
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1answer
296 views
Nest E thermostat on ancient 2-wire Bryant boiler system with 2 zonesq
I have a 2-zone hydronic system running off an ancient Bryant boiler. Power is supplied by a 24V transformer, and each red wire passes through a Taco zone valve before heading off to the appropriate ...
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1answer
194 views
Rattling sound from heating pipes
I keep on hearing a rattling sound like metal banging from 1 section of pipe in my hydronic heating system, I tried bleeding but no improvement. Thanks
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42 views
Bosch Heat Pump + Hydronic Coil?
I was hoping to get some advice on the proper setup for this system. I live in Long Island, NY and just moved into a large house with an extremely old oil burner and 3 a/c condensers. I'm about to ...
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236 views
Slant/Fin Victory II Boiler - How do I turn on?
This summer, we moved into a home that has sub-floor heating installed. However, I have no idea how to use the boiler or turn it on.
The boiler itself (a Slant/Finn Victory II gas-fired boiler) has ...
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78 views
Sagging sewer line under a concrete slab with radiant heating: what are the options?
We've just had a house inspection for house in Vermont, where the septic inspection revealed that the sewer pipe is sagging (or "has a belly") running for about 40 feet under the concrete slab that ...
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1answer
2k views
Anyone installed a hot water coil in their HVAC ductwork to increase heat pump efficiency?
Hydronic heat supplement to Heat pump Home heating System.
Anyone have experience putting a heating coil in the ductwork of a forced air heat pump system?
Background.
The existing HVAC system is a ...
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1answer
218 views
Hydronic kickspace heater on same zone as cast iron radiators?
Small older home that has in-wall cast iron radiators throughout the house in a single zone. Hot water not steam. When the kitchen was remodeled years ago the cast iron radiator was removed because it ...
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137 views
single radiator whistling and whirring on and off (hot water system)
As the question stated, I have a single radiator whistling and whirring on and off and I am trying to understand the cause, so I can stop it. It is a fairly high pitched whistle/whirr/squealing sound. ...
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1answer
605 views
pressure in boiler getting too high
The pressure relief valve on the hydronic system boiler is releasing a little water every time the boiler cycle is almost done and I looked at the gage and its rising to about 30 psi, But I can't ...
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1answer
64 views
Hydronic heat radiators not used for long time - should they be drained?
What should I do with radiators that have been out of action for about 3 years since the boiler went on the blink?
Is it better to drain the water out of the system while system is dormant?
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64 views
Hydronic Heating: Noisy pipes in the basement/walls
My issue is i have a natural gas boiler + hydronic heating system (two zones). It seems that after I remove air from each zones, the heating system is quiet until 12 hours later. In the early morning ,...
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1answer
81 views
Can I run my hydronic circulator off an appliance cord in order to use it to purge air?
I have a hydronic heating system with a relatively powerful B & G circulator pump. This pump has a relay that is controlled by the furnace electronics; if there is no power to the furnace, there'...
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2answers
12k views
How to install hydronic radiant heat over concrete slab
I'm trying to figure out the most ideal way to install hydronic radiant heat in my basement over the existing concrete slab. I've looked at several products for heat distribution, like Warmboard, ...
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2answers
137 views
Are hydronic systems set up as loops or ladders, and how can I tell the difference?
My hydronic system has a loop (or ladder) that visits baseboard radiators on four floors. All piping is hidden in the walls.
On the attached diagram, squares are windows, red is baseboard radiators, ...
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1answer
690 views
Can I install thermostatic radiator valves on a hydronic heating system?
My house has three hydronic heatin loops; two are shaped like a ladder.
The baseboard radiators are plumbed with type M copper pipe.
I'm thinking about installing thermostatic radiator valves on the '...
