Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [hydronic]

80 questions
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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, before settling on this:…
vlozko
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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&G 100). When the circ failed I replaced it in an…
Roz
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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 supply house will only drop off the boiler outside in…
TommyO
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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 this point, everything was fine, the flow was not…
Tomas
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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 both thermostats set to 70, but the main floor is…
Havegooda
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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 heat pump with auxiliary electric heat strips. I am…
user67651
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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?
J Doe
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Do I need to replace the autofill valve on my oil water heater?

I have a ~20 years old Weil-McLain Gold oil boiler connected to the forced hot water baseboard heating system in a 2-story house (two zones with separate pumps, one for every floor). The same heater is also used to heat up tap water. Recently, the…
Shivering
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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 relay inside of the aquastat is clicking and…
Cheery
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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 supply and drained the gas water heater already.…
rome
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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 I can design and install the PEX tubing for hydronic…
Jeremy Foster
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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 pipe with fins arranged around it. The convector…
mr blint
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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 any form of back up heat. When temp's get to low…
Jeremy Coxon
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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 long time. However I noticed that when the pump is on and…
StayOnTarget
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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, doesn't have them daisy chained as I expected,…
TomG
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