Skip to main content

Questions tagged [zoned-heating]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
2 answers
32 views

Another C-wire for Nest thermostat question

Some background first. 30-ish year old furnace/boiler with a zone system and six zones. This was my parents full-time residence in rural Maine, but after my father passed away in 2022, and my mother ...
jsbigs's user avatar
  • 1
0 votes
1 answer
37 views

What are the most cost efficient thermostatic valve values for UFH?

The manifolds on each floor have a thermostatic valve. I recall reading somewhere that for the most efficient system that you set these to the lowest acceptable value. I have these set to 35C. The ...
Cheetah's user avatar
  • 275
1 vote
1 answer
60 views

Two Zone Boiler System. One calls for heat, both zone return lines get hot

I have a newly replaced two zone boiler system and am having issues. One zone is the basement only, the other zone is first and second floor. I have basement zone at 70 and it functions as expected. ...
Mike O'Keefe's user avatar
0 votes
0 answers
27 views

Baseboard heating - some zones stopped heating

Yesterday afternoon between 3 and 6pm, two zones of our baseboard heating system stopped working. There are 4 zones: main floor, 2 basement zones, and 1 zone for the upstairs bedrooms (split level ...
Stephanie Chmiel's user avatar
0 votes
1 answer
53 views

Advice for heating a quadplex rental [closed]

Looking to see the most economical way to heat a quadplex I am in the middle of renting. My building has 1 unit on the upper floor 2 on the main and one in the basement. ~3000 sq. ft. total livable ...
ThunderBuddies's user avatar
0 votes
0 answers
104 views

how to disable a zone damper and shut it OFF?

My system has a trol-a-temp mastertrol mark v model MABS-V-3 (three zone system) for HVAC. I like to permanently disable zone 1 and physically shut off its damper for two reasons: Zone 1 is in an ...
Sid's user avatar
  • 1
1 vote
1 answer
932 views

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 ...
DrLou's user avatar
  • 113
0 votes
1 answer
1k views

How do I add a second Google Nest Thermostat to control a single furnace?

I currently have a Google Nest Thermostat downstairs, and it works fine. I want to add a second thermostat upstairs and then have it 'learn' that I sleep upstairs so it should adjust the temperature ...
myermian's user avatar
  • 387
0 votes
1 answer
35 views

Is it possible to replace a relay on a ncm300 zone controller?

I have an ncm300 zone controller which controls the 3 zones for my furnace and heat pump. There seems to be an issue with a relay sticking which is causing a continuous call for heat even when ...
James's user avatar
  • 1
0 votes
2 answers
639 views

Connecting “C” (common) wire for Nest thermostats

I am planning to get two Nest Thermostats for my 2 zone HVAC system. It looks like blue C wire is already there for both thermostats, but not connected (existing thermostats run on batteries). I ...
Cube's user avatar
  • 9
0 votes
0 answers
83 views

How do I fix the tempertature differences between 3 floors in my house?

In my ~5000 square foot house, the finished basement is very cold, A/C set point stays spot on the main/ground level at 76F, but both upper loft areas 80-84 on hot days! It is a full height 2 story ...
Roll Bot's user avatar
0 votes
0 answers
43 views

Single or two-stage replacement in two zone system

Need to replace an 18 year old single stage, two zoned furnace/AC installed in my converted attic in Chicago. It's in the knee wall and serves the attic and the second floor. Air returns on both ...
Peter Mazarakos's user avatar
0 votes
2 answers
464 views

Why would part of my second floor not have any HVAC airflow?

I recently moved into a townhouse and found that on the 2nd floor, 2 rooms and bath doen't have airflow at all( no ac or heating). First tried with insurance company guys and he removed 1 damper which ...
Chandra Maral's user avatar
1 vote
0 answers
360 views

Can you use a Honeywell HZ322 for zoning with a single-stage HVAC?

The HVAC system in my home was already old when I bought the place a couple years ago, so I knew I would probably be replacing it before too long. The system is zoned with a Honeywell HZ322. This was ...
Dylan Cristy's user avatar
3 votes
1 answer
124 views

What metrics determine whether a zone valve is a suitable replacement for another?

I need to replace a leaking zone valve in my basement. I think I found a replacement for it off of SupplyHouse.com but wanted to make sure it really is a suitably replacement before I pull the trigger ...
hotmeatballsoup's user avatar
2 votes
2 answers
2k views

Honeywell 5-wire zone valve wiring

TL;DR Is a jumper wire necessary between TH/TR and the left-hand END SWITCH? If so, what does it do? As requested, here is my best approximation of a wiring diagram: As it is now (note the missing ...
Nigel Stackhouse's user avatar
0 votes
1 answer
111 views

Replacing 1-Stage Furnace & A/C for Comfort & Efficiency

Need opinions on imminent HVAC work in a Massachusetts home. House and HVAC system descriptions below: House: ~45yrs, 1850 sqft, 2 floors + unfinished basement (furnace located in basement). Each ...
JackOTrade's user avatar
0 votes
1 answer
204 views

Honeywell hz322 heat pump with aux heat

I get heat and aux separately but not together. I checked the 322 and it's calling for both, but only heat light is on. I only have w1 wired... Is this the problem? I see is says to tie w1 and w2 ...
Spanel's user avatar
  • 11
3 votes
3 answers
704 views

How to test whether or not a breaker is powering a zone valve and thermostat?

I have a fuel burner (fuel oil) that heats water and provides my home with baseboard heat. I have two thermostats and zone valves, both by White Rogers (and both pretty old): one set for the ...
hotmeatballsoup's user avatar
-1 votes
1 answer
2k views

Only one zone heating in a two-zone hot water based heating system (oil)

I have two zones in my oil heating system, down and up -stairs with two separate thermostats one circulator and two zone valves. For some reason the downstairs zone works perfectly well, but the ...
Silex's user avatar
  • 99
0 votes
1 answer
1k views

One bedroom in a heating zone hotter than others

I have a total of three zones for heat in my house. I have oil heat. There is a zone for my hot water tank, a zone for the living room, family room, kitchen/dining and a zone for the three bedrooms ...
MCP_infiltrator's user avatar
2 votes
1 answer
231 views

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 ...
Jeremy Coxon's user avatar
0 votes
1 answer
142 views

Why does my radiant heater have multiple zone valves?

I have in-floor water radiant heating. There are five zones of varying sizes. In some larger zones there are multiple circulation loops split from the supply and then recombined for the return. I ...
Matthew's user avatar
  • 9,867
0 votes
2 answers
1k views

HVAC turning on heat during cooling cycle

I have a zoned HVAC system that uses a Honeywell control board(see below) and dampers for zoning. If I set the upstairs thermostat to call for cooling, it will cool for a while before suddenly ...
robertmain's user avatar
1 vote
1 answer
1k views

R and C wiring for Air Handler and Zone Panel

First time posting a question! But have been reading the questions/answers here for a while now. Ok- so I have a brand new Goodman Heat Pump system (GSZC + AVPTC air handler) I’ve installed in my ...
Labarc35's user avatar
1 vote
0 answers
471 views

Should I convert two AC units to a dual-zoned unit?

One-story 2200 square ft home, currently with two AC units, need replacing, which is better two AC units or a dual zoned hvac system?
Dessie Block's user avatar
-1 votes
1 answer
44 views

Sun room hvac heating and air

I have a screened porch with one side brick and three walls screens. The ceiling is 1/2 inch plywood. The window guys from window world are coming out in a week or two to install windows and remove ...
Timothy Ryan's user avatar
0 votes
1 answer
2k views

Run mini-split heat pump heads at different temperatures

I vaguely remember the contractor who did maintenance on our ductless heat pumps two summers ago telling us not to set the thermostats of the two small heads that share an outdoor unit to different ...
ShapeOfMatter's user avatar
0 votes
0 answers
27 views

Should I do away with the HVAC zone system entirely or spend the money to replace/update a non working system?

I know nothing about this but I have a two story 2000 sq. ft home built in 2006. The zone system failed. To update it will cost alot. To do away with the two zone system is much less. I'm not sure how ...
user128261's user avatar
0 votes
1 answer
262 views

Zoned Forced Air System Runs 2.5X Upstairs vs. Downstairs

I bought a house built in 2005, ~4100 sq. ft. Reasonably insulated to code, as required in Chicago, IL. I've got an upstairs thermostat and downstairs thermostat. Both are Nest thermostats ...
Leroy105's user avatar
  • 313
-1 votes
1 answer
587 views

Determining what zones are controlled by which thermostat

I purchased a quad plex. We live in the double unit on the first floor and have one thermostat which seems to call for heat in our zone. On the second floor there are 2 units with seperate thermostats ...
Anna Dowbiggin's user avatar
1 vote
1 answer
252 views

Thermostat C wiring issue

I am having a two-wire system oil boiler with two-zone valves. I installed two Nest E and worked fine but it started to swing the valves due to the charging cycle. So I decided to run a new C wire ...
neoengine's user avatar
0 votes
1 answer
1k views

c wire on a multi taco zone valve boiler

looking for assurance on what I think is the right setup to add a c wire to a current 2 wire zone setup. See pic of transformer junction box. Currently I have 3 zones using one transformer and 3 taco ...
Da P.A's user avatar
  • 167
0 votes
1 answer
412 views

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. ...
Phill Apley's user avatar
0 votes
0 answers
101 views

Boiler System heats one room more than all others

I have a two zone older natural gas boiler system. All rooms in the house get heat. One room on the second floor gets hotter than all others. Almost like all the heat is going to that room I don’t ...
Bill C 's user avatar
1 vote
2 answers
2k views

How to properly pipe a hydronic heating system

Background: I am installing a hydronic radiant floor heating system myself and getting all the information required is a combination of many different websites. It doesn't seem like there is an all-in-...
Jon Tinsman's user avatar
0 votes
1 answer
2k views

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, ...
Adirondack Jim's user avatar
0 votes
1 answer
365 views

Different wirings on 2 thermostats controlled by a 2 minizone system

I was replacing my 2 thermostats controlled by a 2 mini zone system (Trol-A-Temp). One of the thermostat has 6 wires/terminals (Y,W,R,G,O,B). The other one has 3 wires/terminals (Y,W,R). I was ...
Efren's user avatar
  • 3
0 votes
0 answers
257 views

how to drain a specific heating zone?

I have hot water baseboard heating, with three zones. I would like to drain one of them in order to complete some renovations which requires moving some baseboard out of the way. I'm not sure what the ...
salman b's user avatar
0 votes
0 answers
33 views

How to wire in gas boiler zone valves with out a zvc

Does anyone have a basic wiring schematic for wiring up 3 zone valves without a zone valve controller? They are honeywell zone valves. The boiler is brand new and everything is prewired. It just ...
kirk bee's user avatar
1 vote
0 answers
99 views

Are 8-Zone Wiring Centers Compatible With Smart Thermostats?

I'm looking at various wiring centers for gas boiler heating and I'm wondering if they're compatible with the major smart thermostats, such as Nest, Hive, and Honeywell. Wiring Centers: Reliance:...
Kiril's user avatar
  • 111
2 votes
1 answer
1k views

HVAC Heat only comes on when Fan is set to "ON" (not Auto)

have a weird problem that JUST started happening. When I turn the thermostat up with the fan set to "AUTO", nothing happens. The furnace does not light and the fan does not come on. This worked fine ...
Phil M's user avatar
  • 21
0 votes
0 answers
51 views

Boiler Zone issue after thermostat install

I just bought a new to me house, built in 1970. I replaced the old mercury thermostats with new programable digital ones. They worked great for the first 12 hours. Kept and read temps like it was set. ...
Kilipaki Harris's user avatar
1 vote
1 answer
753 views

Does manual operation of a Taco 570 series zone valve operate the boiler?

I have a home with multiple zones with the valves mentioned in the question. The documentation (http://www.taco-hvac.com/uploads/FileLibrary/100-3.pdf) isn't clear about whether contact 3 is ...
TomG's user avatar
  • 3,948
-1 votes
1 answer
1k views

Zoned 2 stage heat pump system, aux heat not engaging

Homeowner here...I have a 2 stage heat pump split system with the ducting zoned for 2 zones. The units are as follows: Compressor: Goodman GSZC16 heat pump Zone control board: Honeywell HZ322 ...
StephenT's user avatar
1 vote
0 answers
110 views

Strange behaviour with 4 zone central heating timer (John Guest TM4 / Heatmiser TM4)

I have a 4 zone heating timer (HW, Underfloor Heating, Towel Rail and the 4th zone is unused). I moved into a new build a few years ago. After 3 years my heating timer unit (John Guest TM4) started ...
Not My Problem's user avatar
0 votes
2 answers
1k views

Why does a system boiler with hot water cylinder not use a diverter valve?

I understand that it doesn't need a diverter valve... But I was thinking, couldn't the system be more efficient with one? For example, the central heating could run at a low temperature (35°-40°) and ...
CurtisJC's user avatar
  • 125
12 votes
5 answers
3k views

Most cost effective thermostat setting: consistent temperature vs. lowest temperature possible

The problem: Our heating bills are about 25% higher than our average neighbors according to our bill, yet our temperature is always as low as we can stand it (mid 50's), we have excellent insulation ...
David's user avatar
  • 223
0 votes
2 answers
5k views

HZ432 and no heat in one zone

I have 4 zones... The following lights are on the HZ432: Heat 1 - red Heat 2 - red Heat 3 - no light Zone 1 - yellow Zone 2 - red Zone 3 - red Zone 4 - red I have heat in 3 zones, but not in one of ...
Kathie Liboon's user avatar
1 vote
1 answer
41k views

Are these red lights on my Honeywell HZ432 why my bedroom isn't blowing in heat?

I just moved into a new multi-family house with central heat/AC and the 3rd floor bedroom doesn't seem to warm up very well. When the thermostat is on, I don't feel hot air blowing in from the vents ...
MonkeyBonkey's user avatar
  • 1,209