For questions regarding a central heating system for the home. The system consists of a furnace or boiler and a method to distribute the heat throughout the home.

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5answers
95 views

How to Lower the Ouptut of Oversized Furnace

Questions I would like to lower the output capacity of my furnace if possible. How can I do this? Is it worth doing, or should I just live with it? Is there an easy way? Some ideas: replace burner ...
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0answers
18 views

How to add a new radiator/plinth heater into heating circuit? Series or Parallel?

I've just bought an hydronic [sic] plinth heater to go in my kitchen and I'm not sure how to plumb it in. I currently have a combi-boiler central heating circuit with all HEP (plastic) pipe and ...
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0answers
16 views

Heating system is heating the radiators instead of the hot water - why?

We have a heating system with a boiler, hot water cylinder and a controller to set the timers for the heating and hot water which it then switches between accordingly. Lately, it intermittently (I ...
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2answers
36 views

Are my heat pumps using the right amount of power?

I'm trying to figure out if our two heat pumps are being power hogs and if there is something to do about it, or if they're operating normally. We bought our home recently and haven't been in it but a ...
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1answer
34 views

Why might a central heating programmer no longer override a room thermostat?

My central heating and hot water is governed by a Danfoss FP715 Si. Using this I can set the time each day when the central heating and the hot water come on and off. When the central heating is on it ...
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2answers
42 views

Why won't my heater fan come on?

Central-air heater fan won't run, either in Auto or On mode. The heat comes on, but the fan doesn't. Even with heat switched off, the fan should run if I switch it On. The breaker is on, the wall ...
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2answers
35 views

Why is my booster fan pulling cold air from outside?

This is my first winter in a house with an oil-heated, forced air system. I noticed my wall vents were pushing out warm air, but the floor cold air return vents were pushing out cool air. I followed ...
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0answers
48 views

HVAC - hot air flowing on both zones when only 1 zone should be on

I have 2-zone forced air heating, with separate thermostats for each zone. Normally, if the thermostat in zone 1 triggers the system to go on, the heat will only blow through the vents in zone 1. ...
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0answers
16 views

Central heating gas remote controller

I bought a Broadlink RM2 controller that works on 433MHz. How can I control a central heating unit with that? I haven't bought the central heating unit yet but I was thinking at ARISTON CLASS EVO 30 ...
3
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2answers
389 views

Is turning the heater off in absence cheaper than holding a low temperature?

Winter is coming and I live in a badly insulated flat in Germany. Outside temperatures are around 0°C at the moment. When I'm absent for a weekend, should I turn the central heating off entirely and ...
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3answers
1k views

How can I stop our duct work “pinging” at night?

I'm in Canada, and our home is a bit older, ~20 years, and the duct work seems to be making a rather loud "pinging" noise at night. I assume this is due to colder weather in general, and the hot air ...
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1answer
49 views

Direction of flow in radiator

I am about to install a new radiator in my apartment; we removed the old one without noting the direction of water flow. So I now have two pipes sticking out of the floor and I don't know which is ...
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1answer
30 views

Need to purge air from every radiatior?

I have a gas fired hot water central heating system. Water is circulated by two zone pumps at the furnace. There is an automatic fill valve. I recently had work done on the heating system, and the ...
3
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2answers
519 views

Hvac Fan only blows in 'fan on' mode while heating

Our HVAC Fan only blows in 'fan on' mode while heating. In other words the fan will not blow in heat mode if switched to "fan auto". Both fan on and fan auto modes work when cooling. See image below, ...
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0answers
29 views

What is this heating thermostatic head connection called?

I want to purchase and install thermostatic head for heating radiator valve in my room but can't identify connection type. The radiator itself and valve don't have manufacturer name on it. What is ...
2
votes
1answer
82 views

Brass central heating elbow joint leaking at connection to plastic pipe

Since removing a radiator to decorate a room I've had a slow leak in the central heating. Luckily I've found where it is - directly below said radiator - I must have moved it about too much in the ...
0
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1answer
74 views

Is there any way to heat up a space noise free?

I hate my gas furnace so much, because the central heating system is so noisy. So, I bought a portable oil radiator heater, which is a temporary solution for me. It is truly noise free though. But ...
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0answers
44 views

How to cap or close thermostatic radiator valve

I need to remove a radiator from the wall. When I set the thermostatic radiator valve to it's zero position and disconnect the outlet of the valve I get a strong flow of water. The water is ...
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0answers
71 views

How to fix uneven central heating and air?

My central heating and air conditioning system does not heat my home evenly. Half of the house gets significantly warmer / cooler than the other half. I have tried adjusting the registers, but to no ...
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1answer
122 views

dripping sound in ceiling when central heating gets warm

I am a complete novice about plumbing so apologies in advance. Basically I have noticed that, when my central heating warms up I hear what sounds like a dripping noise in the ceiling. This seems to ...
4
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1answer
288 views

Is it OK to use old (30+ years) heating oil in my central heating furnace?

I found old steel jerrycans holding ~50 gallons (~200 liters) of heating oil. They were stored in a place where temperature can go below -5°C. Is it safe to use it for heating? If so, should I mix ...
4
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1answer
87 views

What could cause my boiler to provide hot water, but not heating?

My boiler kicks in when the thermostat asks it to, but when my room thermostat asks the boiler to fire up, nothing happens. My room thermostat clicks on, and lights up so I think it can tell the ...
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0answers
63 views

Two radiators are always hot

Three months ago I moved to a house with a back-boiler (gas) which supplies the hot water tank and the central heating. Apparently it has been serviced recently. There is a thermostat in the kitchen ...
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1answer
75 views

Plastic central heating pipe - cover up in built-in cupboard

I have a built in cupboard which has plastic water pipes travelling vertically up the inside (supplying a small radiator in the loft). I want to cover them up because they're ugly, awkward and also ...
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3answers
61 views

Furnace running.Shuting off for a few mins then starting again.Continued process

Why would my furnace run it's cycle, shut down and then start up again a few minutes later. Continuing this cycle all night?? Thanks
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0answers
58 views

Why does the A/C come on downstairs when heat is on?

I just moved in to a 2-story house. It is zoned upstairs and downstairs. If I turn the downstairs thermostat to OFF and the upstairs to COOL, the HVAC in the attic comes on, the outside compressor ...
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1answer
184 views

How to determine if my heating & cooling system is adequate for my home?

Is there some kind of calculation I can follow to determine if the heating and cooling system in my home is rated (adequate) for the size of the house? I assume there is some way to say something ...
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2answers
198 views

Funny “thump” sounds sometimes at night, what could be the cause?

I live in a 4-story townhouse that has a wood frame (no concrete except in basement) and was built in late 1980's. Once in a blue moon, whilst laying on the bed at night, I have heard a rather loud ...
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0answers
224 views

Heater/blower always on

Another puzzler. I have a Lennox CBX26UH 3-ton air handler with the 2-stage, 3-element 15kW electric heater option. The problem, as in the title, is that the system, when power is applied, is always ...
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0answers
189 views

How to stop central heating system from leaking

Our central heating system is leaking a bit of water. The system is a Ferolli Megadens 5, it heats water for both the central heating system and the shower/tap. There are several pipes below the ...
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1answer
147 views

Should a copper central-heating water pipe be mortar-ed in when passing through an internal wall?

I've been trying to track down some very annoying 'ticking' sounds that happen within seconds of the central heating coming on. I know that it likely to do with copper central heating pipes under the ...
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1answer
1k views

What could be causing my Lennox furnace to blow cool air?

My Lennox outside furnace is blowing cool air, not hot even when the burner is lit. It takes 3 times longer to heat the house than it should. I just had the draft motor replace about a month ago and ...
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1answer
251 views

How can I tidy up a hole in drywall that has pipes coming through it?

We recently bought our first house and have discovered that the previous owners replaced a radiator with a heated towel rail that's plumbed into the house's central heating system. The issue is that a ...
2
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1answer
431 views

How do I connect a C wire to an Utica PEG112CDE steam boiler?

I want to upgrade my old mercury thermostat that I currently have to a newer programmable thermostat. This little DIY project is for my first late 1920's home that I recently purchased. I currently ...
2
votes
2answers
152 views

Why is one radiator TRV in the house missing the control?

My house had a new gas central heating system fitted, with new radiators, before I moved in. One radiator (in the tiny downstairs WC) is missing the control knob for the TRV, and is set to the highest ...
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0answers
48 views

What material to use to clog previously cut central heating pipes

I used to have a central heating system which was never in use for years, because it couldn't be connected to central pipe inside other building. Last winter I finally dropped water from it and cut ...
2
votes
1answer
677 views

Why does my heat pump keep triggering the high-pressure cut-off?

Our Rheem heat-pump is on the fritz. It keeps triggering the high-pressure cut-off on the outdoor unit. We've had problems with this happening before, but only when the outside temperature got to ...
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3answers
554 views

A/c makes the lights turn on and off! No Joke!

The lights on the first floor, upstairs bathroom and upstairs Laundry room won't work. The breakers did NOT pop The air conditioning was running this morning but is not working now. When the ...
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1answer
361 views

What is the best way to retrofit an underfloor heating system in a concrete slab?

I have a UK bungalow that I am renovating. I would like to replace the current heating system (radiators, natural gas boiler) with an underfloor heating system. I think the cost of digging up the ...
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1answer
6k views

What causes a HVAC control transformer to overheat?

I recently replaced my 24 volt HVAC control transformer. The outside unit started up including the air handler and ran for maybe 10 minutes. After the units shut down I noticed that the transformer ...
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1answer
174 views

Can I change my standard thermostat to a Wifi one?

I have a (quite standard) TR-010X T6360A thermostat that looks like this: And this is the wiring diagram: Can I install the Heatmiser PRT-TS WiFi Touchscreen Programmable Thermostat? This is the ...
2
votes
4answers
20k views

What to do about different rooms in the house being a completely different temperature?

I moved into a 30 year old home last December. There is a problem with the HVAC. I have included a very crude drawing of the floor plan The problem is that I can't maintain a comfortable ...
0
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0answers
96 views

Are wall air vents a potential problem?

A house I'm looking at has A/C vents in the walls, rather than in the ceiling or floor. I've never lived in a house with air ducts in the walls. Can I expect to have problems? The house was built in ...
0
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0answers
86 views

Honeywell wireless thermostat and central heating controler problem

We have a Honeywell wireless thermostat and central heating controller. It is set to maintain a temperature at 21c between 8 and 10, and then between 4 and 10. In the other periods, it is set to ...
0
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1answer
2k views

I have just reset furnace due to a trouble code, what should I monitor or re-do over the next few days?

My furnace was throwing a trouble code. The code was 31 and for my manufacturer (Bryant) and others thats is a pressure switch code. I was able to resolve this code and get my heat back on simply by ...
0
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1answer
168 views

Would connecting the downpipe to a gas boiler inlet save energy?

I have a condensing gas boiler for tap-water and central heating. Not very far from the inlet there is a downpipe outlet for the sewer. Since this smelly pipe is partially filled with the same ...
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1answer
351 views

What to do first in a house with poor thermal performance and high energy bills

I just moved into a house and am a little bit disappointed in its thermal performance so far. It's winter and cold outside, and the furnace heats the house up pretty quickly, but then the house gets ...
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1answer
6k views

When should HVAC returns be opened and closed?

My Pennsylvania house was built in the early 90s, has central heat (natural gas) and central A/C, and most rooms have pairs of closable air returns on the wall near the floor and ceiling. I've been ...
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1answer
804 views

Radiators don't heat up evenly, and am missing an Expansion Vessel. Do I need it?

I have a new Worcester 40CDI Regular Boiler that does not come with a built-in expansion vessel. I just discovered that the installer did not install an external expansion vessel either. For HW, I ...
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1answer
409 views

Why does the blower in the attic vibrate during heating when it is really cold?

We have a Carrier heat pump system in our home, and the blower is located in the attic. When it is especially cold, the blower runs on high (there are three levels: high, medium, low). During this ...