Questions tagged [heating]

For general questions on heating in your home. Be sure to also include tags describing fuel source (electric-heat or gas), type of components, etc.

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Canada - Rerouting propane heater exhaust from under deck?

The previous owner routed the water heater exhaust under his deck, under the patio door. It is placed 6ft from the HRV inlet. Since it's under the patio door, I can't route it vertically. It is also ...
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2 answers
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Is 2 stage furnace worth it in dual fuel setup?

I am replacing a gas furnace with AC unit with a gas + heat pump system. Looking at 2 stage furnaces I was left to wonder if its advantages hold in that setup. If gas is only used for temperature ...
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Low Profile Floor for Water Underfloor Heating retrofit?

I've installed a wet underfloor heating system over my ground floor subfloor and have just been told by a supplier that I can no longer buy the stiff boards that would have gone over the UFH and under ...
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1 answer
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Wiring of a Vine TJ225 thermostat

How do i wire a TJ225 Vine thermostat? I have 2 red wires, a green, a white, and a blue wire. Red wires go to RH, and R, G goes to green, white to white, and the blue goes to Y on the old thermostat, ...
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omit a cooling stage to better align with unbalanced Heat Pump demands?

My 2002 house near Albany, NY has central heat but no AC. I've run several manual J calcs and yield 29k cooling and 53k heating. I'd like to use the heat pump for my primary heat and leave my ...
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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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regular oven conversion to support convection [closed]

Preface: I thought about posting this on the Seasoned Advice (Cooking) SE network but concluded that the engineering/architectural aspects of this topic and question justified placement here. I'm open ...
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3 answers
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Electric infloor heat with solid hardwood floors - should the wood feel warm?

I am using Warmly Yours infloor electric heating cables, as well as Mysa thermostats. On the same 240v circuit, I have a bathroom (tile) and a kids bedroom (solid hardwood floor). Ohms we’re tested ...
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Can I glue cement backer board to Roth radiant floor panels instead of screwing them?

We are adding radiant floor heat to a concrete floor with Roth panels. Their info sheet shows concrete backer board attached with screws at 8" o.c. This would be hundreds of long Tapcons into the ...
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Choosing Where to Place Forced Air Wall Heaters

I have a small home ~800 sq ft in a mountain climate that gets quite cold in the winters (10s-20s F in the day in the winter). I already have a pellet stove but the other existing heat comes from two ...
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3 votes
1 answer
2k views

Why does my heat pump "blow" at warm (even hot) outdoor temperatures? Should not it be inactive?

We have a Hoval UltraSource B compact C (8,11/200) air/water heat pump in our house. I have noticed in warm weather that occasionally my heat pump "blows" outside. I then thought that my ...
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1 answer
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Can I replace one hot water radiator with electric underfloor heat?

My home in NJ, USA uses has gas-fired hot water radiators for heat. I am renovating the bathroom and will be adding underfloor heat. The bathroom has a radiator that I'd like to eliminate. I don't ...
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1 vote
2 answers
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Solar powered heating, the 1st step on the research phase

We've just bought somewhere in Portugal and the gas prices are very expensive. Portugal gets a lot of sun, so we figured let's see if we can heat with solar. We ideally do not want to be adding things ...
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31 votes
11 answers
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Why are so many radiators installed beneath a window (at least in Germany)?

I live in Germany and I always wondered why the radiators in most apartments are installed right beneath a window. The pictures below show an example (this is an older building, but you see similar ...
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2 answers
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Can I split a single 2500 watt baseboard heater into 2 smaller heaters?

I am converting a large bedroom into 2 smaller rooms by adding a dividing wall and hallway (see diagram). The large room had a 2500 Watt electric baseboard heater (240V). I would like to use that same ...
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UK heating system, manual bypass valve - what's the standard operating procedure?

In the heating system with the following schematic, a manual bypass valve is always closed (otherwise radiators will not heat up properly). However, as far as I understand, this means that when both ...
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Thermostat swap

While switching out thermostat I noticed only two wires instead of more Rh W to be specific. The new thermostat has no Rh only R and Rc on Wich I selected R. Heat turns on now but doesn't turn off at ...
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Radiant Barrier: with or without Insulation?

Researching an attic radiant barrier for my old home has yielded two general classes of radiant barrier: simple films and then sandwiches of film/insulation/film. Is there really much benefit to ...
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3 votes
1 answer
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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 ...
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1 answer
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repair a leak for an electrical oil heating radiator

I have a radiator that has started leaking oil, by its bolt. I assume that cause can be that metal is a bit rusty around the bolt, as it is easy to remove the paint when scratching and a bit of rust ...
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Can you use a tankless combi boiler ONLY for central heating?

We're looking into replacing our boiler. The current one is tankless and only provides hot water for heating on a closed loop. There is an entirely separate electric HW tank & plumbing for '...
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1 vote
1 answer
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Will this DIY system to extract hot air from behind a fireplace work and be safe?

I have a fireplace insert at home, whose top is behind a very thick slab of stone, so it is not possible to open a proper vent for the hot air to reach the room. As a result, the room is only heated ...
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3 votes
1 answer
593 views

Is it a good idea to go all ductless? [closed]

I have a 2000 sq ft house in TN(mostly air-conditioning is used, winter is mild) and the house has 2 trane gas furnace for heating(both 25+ yrs old) that need to be replaced, one 25+ yr old air ...
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1 answer
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Did Dishes with Radiator Water For a Year [closed]

The valves connected between my (serpentine) hot water tank and radiators is broken. Moreover the serpentine is broken and hence the hot water for showering and doing the dishes has been cross-...
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nordyne hvac furnace will not fire up, tries 2-3 times, the grey resistors get real hot

nordyne furnace kept giving me communication code, replaced thermostat, ran fine for a week. get pressure switch codes so i replaced them. now it starts cycle and wont fire, if i leave the unit off ...
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4 votes
1 answer
2k views

Why do I have 3 HVAC professionals telling me 3 different things about heat gain/heat loss?

I sent the same set of house drawings to 3 different firms that size HVAC equipment. They each sent back signed designs. Here are the results: Firm 1: 65k BTU/h Heat Loss – 45k BTU/h Heat Gain Firm 2: ...
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4 votes
1 answer
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Enabling heat-pump load shedding when running on generator power

I electrified my heating system by replacing my air conditioning condenser with a heat pump. I hired a contractor to install a Trane variable speed heat pump and matching air handler. The air handler ...
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-1 votes
2 answers
69 views

Navien: water cold in winter and hot in the summer

I have a combi Navien tankless hot water heater. It heats my home as well as the water. I keep getting lukewarm water in the shower even after the lever is turned completely to hot. The Navien service ...
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3 votes
3 answers
814 views

Is it more efficient to heat a room using an air conditioner (heat pump) when the windows are open?

In general, using an air-conditioner for heating is more efficient than a standard electric heater or radiator. But in our home, we keep the windows open all the time, in order to decrease the chance ...
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0 votes
1 answer
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Is one of my heat zones not heating because of a valve problem?

One zone isn't heating and I'm trying to figure out why before calling for assistance. The pump is running, the thermostat is working, and the pipes are hot but only really hot on the left side of the ...
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0 answers
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Lennox 80mgf3-75a-3 furnace 4 flashes of one LED after gas burns, takes forever to heat

I have a Lennox 80mgf3-75a-3. Here is how it is operating: Thermostat sends signal Gas burners come on in about 20 seconds (LED flashes slowly and simultaneously - furnace has only one LED ) Then ...
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1 vote
1 answer
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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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Why vent on first floor blows cold air mostly and hot air sometimes?

My house has 3 floors and gas furnace is on 3rd floor. First floor has total of 3 vents but one of those blows cold air most of the time and hot air rarely. The other 2 vents on the same floor blows ...
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0 votes
1 answer
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Furnce shutting off frequently. Have to blow air into exhaust vent to turn on. Why is that?

I have high efficiency natural gas furnace. In the picture you see intake and exhaust vents on the outside of the house. Specially in colder days temperature reaches below target temperature, ...
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6 votes
1 answer
264 views

Is using a smart thermostat less efficient?

I’ve engaged in a conversation about using a smart thermostat, lowering temp at night and when away, and bringing it back up when home. A number of people claim their HVAC guy says maintaining the ...
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1 vote
0 answers
137 views

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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3 answers
243 views

What is causing leak at my boiler through pressure relief valve?

Recently my boiler is leaking periodically through the pressure relief valve. I replaced with a new pressure relief valve. Still leaking so I hired a plumber he said my expansion tank is filled with ...
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Downstairs WC cold - Extractor or windows?

I have a new build and of course there will be a few niggles here and there, however one of the biggest gripes is that the downstairs WC (toilet) feels chilly when compared with the hallway just the ...
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1 vote
1 answer
54 views

Would it be dangerous to tap an existing flame sensor circuit to create a common connection for my thermostat?

I'm considering using this answer to connect a common wire to my thermostat. I have the exact same setup, and have verified with my multimiter that the red T terminal outside F terminal beeps, while ...
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1 answer
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Saving energy with wall-mounted boiler and radiators

I have a wall-mounted gas boiler and four radiators around the house in different rooms and locations, and the thermostat is in the living room. I wonder should I close all radiators except the one in ...
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-1 votes
2 answers
43 views

Underfloor heating in bathroom Floor not heating

Pipes in screed osb board over it and floor is tiled .Tiles’s not heating up great any ideas
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19 votes
7 answers
7k views

Why is my house energy efficient only in winter?

My electric utility company sent me a graph of my home's electricity usage over time as shown in the picture below. My home beats what the company considers as efficient homes in the neighborhood when ...
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0 votes
1 answer
77 views

Using water cooler for CNC laser as residential heat pump

I want to save money on heating bills. Residential heat pump systems cost thousands of dollars, which I can't afford. I am considering using a heat pump marketed to chill water for cooling CNC lasers (...
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-1 votes
1 answer
76 views

Nest thermostat issue - only blows hot air if heat is on and fan is forced on. No air circulation with heat only

A few months ago I installed a nest thermostat and everything worked fine. I ended up giving that one away and installed another one A few days ago. It worked for one day and then it stopped heating. ...
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0 votes
1 answer
101 views

Why are my heat radiators only partially heated?

We moved in to a house around 6 months ago. I noticed that our radiators were not getting too hot so went ahead and bled them. I managed to eventually get water out of most of them however a couple of ...
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Only unit in condo building with water hammer

This exchange is always helpful. I read a similar post for some ideas, but this situation is slightly different. I have hydronic baseboard heating with a common boiler in the garage under the building....
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1 answer
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Can I run a 9KW sauna heater on 8AWG wire with 40A breaker

I am looking forward to purchasing a sauna heater and the one I like is 9KW. Under 240V the amperage will be 37.5A. The heater is about 10 feet away from the electric panel. I already have the wire ...
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1 vote
1 answer
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Vapour barrier for insulated, occasionally-heated Toronto shed?

I'm building an 8x12 garden shed in Toronto Canada (cold winters, fairly hot & humid summers). 2x4 construction, exterior Tyvek wrap, hardie siding onto studs, roof is metal standing seam over OSB ...
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0 votes
1 answer
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Correct wiring for second thermostat

In a previous question on here I was trying to figure out why my basement radiators weren't working. With everyone's help I was able to figure out that the zone valve on the pipe which came from the ...
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1 vote
0 answers
36 views

Very old Coleman gas wall mounted furnace

The control dial (Lo, 1, 2, 3, etc.) no longer seems to be working. Furnace is either up all the way or I can turn it off. No medium range. Pilot stays lit. Thank you for any suggestions. Diane
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