Questions tagged [water-circulating-heating]

A central heating system that transfers heat from a boiler to each room through a fluid filled plumbing system.

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41 views

Tankless Hot Water Recirculation

I recently had a Rheem Tankless Water Heater installed. The rtgh-95dvln-2. They installed the pump kit meant for the water heater, the ap17920. However, I do not have a dedicated recirculation line, ...
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41 views

How can I figure out if a Combi Boiler will be adequate for my house?

We recently moved into our new home that currently has a Super Hot MG-100 Hydronic Boiler (installed in 1986, when the house was built). Clearly, it's done its job and in need of a replacement. We had ...
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24 views

Boiler not circulating

I have a Bosch 30 HRC boiler. Yesterday, I added water to the system, increasing the pressure from 1 bar to just below 2 bar. I vented each radiator in the house to bleed the boiler. When I open the ...
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1answer
21 views

Upgated pump for 10 zones, 3 floor house?

I currently have a tanco (I don't have the current model # now) in a 5 zone 2 story house. I was recommended to upgrade to a tanco 0010-F3-1IFC bc I am adding 5 more zones, and 2 zones will go up to ...
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1answer
21 views

Removing hotwater baseboard heater

I would like to remove the wallplate of my baseboard hotwater heater element. I got everything apart except the wallplate which I can't get off. I removed the nails that I thought were the only thing ...
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2answers
77 views

Can I adjust the temperature of the water in my radiators?

I'm a complete newbie when it comes to HVAC. I did manage to install a new thermostat with help from here so I try again. I have a oil burner baseboard hot water system. My hot tap water is also ...
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39 views

Using 6 gallon hot water tank as recirculation device

If I pump water continuously through a small 6 gallon hot water tank recirculating from a 60-70 gallon water tank will this work to heat the water over 36-48 hours? I'm not concerned about if it's ...
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27 views

Why am I getting cold water at faucets near the end of a circulation loop?

We have a circulating pump for our hot water tank - the pump sits between the tank and the line going into the house. The issue i'm facing is if the pump is not running, I get endless cold water to ...
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16 views

We have a ranch home with baseboard heat, 2 zones work 2 zones dont

We have 4 zones and 4 thermostats with baseboard heat in our ranch home.. 2 zones are working, and 2 zones are cold. What would cause this?
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153 views

Hot water recirculation pump suggestion in home with return hot water line [closed]

We had a hot water re-circulation pump by water heater before and had it removed last December when we detected leaks around it. This is our setup: We have a return hot water line coming back to the ...
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1answer
250 views

Sizing a circulator pump in a closed loop heating system with multiple zones

I'm thinking through an install of a new combination boiler in my house, and am confused with respect to picking the correct size circulator pump. I've found a few different references (e.g. https://...
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460 views

How to wire a Taco zone valve controller with ecobee

I'm having an issue with wiring my Weil McLain gas boiler. It was wired up fine and working for a single zone. I added (2) 4 wire zone valves in. So I now have 2 zones, a Taco zone valve controller(...
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1answer
139 views

Is hydro air more efficient than gas/oil?

I have heard different things about hydro air systems. I am considering getting one because it is a 5000 SF house and a 1500+ SF addition is planned and I heard that it is easier to expand a hydro ...
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33 views

Could I use perlite under floor heating foam panels?

Context: I want to install an in-floor water based heating system in an apartment on a higher floor. As such, there are 2 problems: I cannot afford to have 2 layers of screed (because I need ...
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78 views

Peerless Boiler not heating - No flame

I have a Peerless boiler and today woke up to it not heating the water. The water definitely feels like it is circulating through the pipes, but the water temp isn't getting over 60 degrees. We had it ...
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1answer
77 views

Should hot water heater pipes in the basement be insulated?

I have a Gambrel style home with gas fired baseboard hotwater system. The hotwater pipes in the basement are located to the outside wall. These pipes are not wrapped in insulation. Would wrapping ...
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2answers
799 views

What could cause my hot water to run out quickly… but only in the bath/shower?

My (London, UK) apartment building's hot water comes from a district heating system and is delivered to my apartment via a "Heat Interface Unit" within the property, owned and maintained by the energy ...
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20 views

Vibrating through beams from circulator pump and at strange times

I have a grundfos alpha 2 circulator pump which for the last two years (since I moved into the house) when the heating turns on makes a vibrating noise. This vibrating noise I believe is then ...
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1answer
42 views

Is it possible to test a drained central heating system without filling it with water

Say there is a house with a just combination (combi) boiler for hot water, but the central heating system has been drained for a couple of years as the house has been uninhabited. Is it possible to ...
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1answer
31 views

Bedroom Radiator not operating properly

We have two nest thermostats installed over a month ago and i am not sure the issue was after or before the installation of nest thermostat. We have two zones of heating installed in our house.One is ...
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1answer
620 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
67 views

What are these controls attached to my boiler for?

If it matters, I live in Ireland. We have an oil boiler powering a two zone hot water radiator heating system and a separate electric hot water tank for tap water. Outside our house in the corner of ...
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2answers
113 views

Hot Water Baseboard Heaters

A contractor came to add an additional hot water baseboard heater into our family room which is an add-on, because there was no heating element in this added room and we could not use the space in the ...
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1answer
325 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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2answers
82 views

What is the typical (N.American/ UK) cost difference between greenfield installation of hot water heating and warm air (HVAC) ducting? [closed]

I am in a situation now where I am having to choose between hydronic heat distribution and forced warm air heating. There are many factors to evaluate and this question is not about the plusses and ...
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1k views

What is this blue build-up on my pipes, and is it an issue?

I've looked around the intertubez, and think this MIGHT be galvanic corrosion, but there was NO sign of it when we bought our 1930's house 5 years ago. The Taco pump WAS replaced 3 years ago (that's ...
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1answer
48 views

Retroffiting buried pipes that carry hot water?

I am considering to improve the efficiency of an existing installation where heat pipes between house and hot water deposit have been insulated with a thin (10mm) neoprene sleeve and directly buried? ...
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2answers
199 views

Boiler vent and expansion tank leaks

I had my boiler inspected and cleaned recently and the tech found a few issues. He showed me how the valve on the expansion tank would leak when he would push it in, which means the tank needs to be ...
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1answer
762 views

What is/are this/these fittings connecting my boiler to circulator pump?

There's a leak somewhere around my circulator pump and the fittings that connect it to the Weil McLain CG-5 gas boiler have corroded and should probably be replaced. (right?) Not very familiar with ...
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3answers
2k views

upgrade circulator pump in closed hot water heating system?

boiler is Weil McLain Gold CGa. current circ pump is Taco 007-F5, installed on return side, pumping water down, and into the boiler. I'm pretty sure this pump is under-sized, as the specs list a ...
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1answer
2k views

Rapid loud tapping in wall adjacent to radiator- when tenant above adjusts

Hello and thank you for your reply. I have a very loud and at times rapid tapping noise in the wall. The apt building is 2 stories high, I am located on the bottom floor (end of the plumbing line). ...
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2answers
714 views

What is the difference between EU and US radiators?

I have a single-zone hot water radiator system and I was looking to balance out differences in room temperatures without going so far as to install another zone at the boiler. While there are ...
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61 views

Shower temperature hot or freezing

Our gas powered shower has been gradually needing an increase in temperature over the last few months in order to have a warm shower. Originally a 32 degree shower was perfect, but gradually we have ...
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1answer
120 views

Underfloor heating and how R values affect it

I am moving into a new house that has underfloor heating (wet system) throughout the ground floor. I am trying to decide what flooring material to use. (tile or wood) I know that tile will be a ...
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1answer
68 views

Should I perform annual maintenance on our heating boiler?

We are new to having a boiler in our house. Should we be doing an annual inspection and cleaning of our boiler? One was done last summer. How often should the system be purged too? Thanks for clearing ...
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1answer
2k views

How to isolate a baseboard heater circuit, drain, purge?

I am renovating a kitchen and in the process have a need to remove a baseboard heater from a wall that will now occupy cabinets. The removal is straightforward and will take 10 minutes tops. However I ...
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2answers
107 views

What is involved in bleeding air from a multi residential hot water baseboard heating system installed in 1965?

Residents are complaining of banging in the hot water baseboard heating system in our multi-residential building built in 1965. How difficult/involved is it to bleed the pipes? Does it have to be done ...
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1answer
73 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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2answers
2k views

Broken Hot Water Circulating Pump - Shouldn't I still have hot water in showers eventually?

I have a Grundfos hot water circulator. After turning off the main to the house and the hot water circulator the other day to change out a valve for our dishwasher, the hot water circulator hasn't ...
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2answers
627 views

Fill heat tank with glycol in off-grid system?

EDIT: I'm settling for a simpler system: no solar thermal panels; just a small 50 liter water heater, AC powered, run through the inverter. (So, practically no hot water in the winter time.) I'm ...
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1answer
200 views

How to get heating system working again?

We have an oil-fired boiler that does both the hot water and the forced hot water baseboard heating system. It was unusually cold and windy last night here in north-central Massachusetts. I turned ...
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2answers
2k views

How to block baseboard (water heated)?

I live in an apartment complex where my water baseboard heating is 100% controlled by the complex staff. This year has been particularly tough, as it's been very warm since winter started and even ...
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2answers
5k views

Why are some rooms warmer than others with radiant baseboard heat?

We have hot water baseboard radiation heat. How is it possible that the first room the hot water is supposed to heat is cold and the second and fourth room are to hot and the third and fifth rooms are ...
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3answers
1k views

heating zone stays hot even when the thermostat isn't calling

we're trying to solve a very strange hot water heating problem (drawing below). We just separated the the 2nd and 3rd floors in my house into two separate heating zones, and the 3rd floor is now ...
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3answers
6k views

Hot and Cold water seem to be mixing

Having a problem with hot and cold water seemingly mixing in my house where some locations can't get cold water and others get a mix of warm/cold from hot settings. The scenario: Moved into a new ...
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2answers
2k views

What is the impact of a backwards connected hot water radiator?

When building a hot water heating system the plumber has connected one of the hot water radiators backwards, i.e., the loop comes in at the bottom of the radiator and leaves the radiator on the other ...
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37 views

Expansion tank is cold

My old-style expansion tank is cold from top to bottom, but I hear boiling water in the pipes right above the gas furnace. Is that normal?
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38 views

FHW oil basedboard radiators are hot even when t-stats turned off. Sediment in pipes?

I moved into a condo a few months ago. It has a forced hot water oil heating system. First floor is one heating zone; second floor is another; boiler is in basement. T-stats are manual/mercury dial....
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2answers
3k views

how to drain a single loop in one of my heating zones?

I have baseboard hot water heat. In one of my heating zones, there are three "loops". (i.e. shortly after the supply leaves the zone valve, the pipes split in three directions. These pipes then ...
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5k views

Connecting PEX and my existing Boiler Heating System

I was thinking of running oxygen barrier PEX under the floor between the joists in a cold room with a crawl space below and then putting rigid foam insulation below to keep the heat in. I have an ...