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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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33 views

Should I run my furnace fan 24/7?

I have a house with four heating zones, three of which are pertinent to this question. A standard summer day might look like this: Top floor - 23c-24c (slightly too warm, AC on most of the time on ...
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22 views

Heat pump running on Heat and fan or Cool and fan

We just had heat pumps installed. I know that you cannot have the heat and the cool going at the same time. But can you have a head in fan mode and another head in heat or cool mode? Sorry for the ...
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33 views

Replacing water expansion tank, by example

I have a "potable water expansion tank" that seems to be connected to the hot water line coming out of my boiler. This line (hot water line) then goes on to all the various zone valves/...
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2answers
90 views

I hear coal burns hotter than wood. Can I burn coal in my wood stove, and just use less?

I hear coal burns hotter than wood. Can I burn coal in my wood stove, and just use less? I'd like to burn wood, too, but like coal.
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31 views

Identify HW aquastat and add common wire to Honeywell aquastat

This has been asked before, but I can't find any info on my Honeywell aquastat. The model number, normally on the inside paper on inside of cover, is missing so I do not have any model number. There ...
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1answer
45 views

Is there a reason to choose taped fiberglass bats vs fiberglass tubes when insulating heating ducts?

I'm going to insulate the 6" round metal heating ducts in my crawlspace, and I have pretty good access. It's the SF bay area, so it doesn't get very cold. Is there a reason to choose taped ...
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9 views

Glow-worm 18HX Gas Boiler F25 Fault [duplicate]

This boiler installed 2015 and serviced regularly. Recently developed CH problem , Fault F25 appears on display. Can be reset to work again for short period (Hours not days). Because its summer ...
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2answers
141 views

Is there a reason to replace 50 year old metal ducting in the crawlspace with modern insulated flexible ducting?

My concern is heat loss in the chilly crawlspace. No AC here, only forced air gas furnace. The existing metal ducting in the crawl space is over 50 years but is intact. There is a very thin layer of ...
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4answers
78 views

Heating and cooling for insulated shed [closed]

I have a 120 sq. Foot shed. That I’d like to insulate and put climate control in. The walls are full height, and it would have an attic area after insulation/drywall installation with the 30 degree ...
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1answer
61 views

How to disconnect water radiators with both pipes on the same side?

I have water radiators where the in/out pipes are connected on the same side, and I can't find a guide online to explain how to disconnect those (all videos I find have 1 pipe on each side) What I ...
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1answer
75 views

Does effective insulation of concreate block contribute more to energy efficiency in hot weather or cold weather [closed]

I am building a grout filled CMU house in the Ozarks. I have limited funds at this point and so I would like to focus my budget on thermal control where it will be needed most (i.e. heating / cooling)....
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1answer
29 views

Parallel loop in existing FHW zone - will this work?

I have a contractor renovating a space for my in-laws, and his plumber added two kick heaters and tied them into an existing FHW zone, but did it differently than I expected. I expected him to tap ...
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45 views

Heat Pump Compressor not turning on in heat mode

UPDATE 29-MAY-2021: So I have it working now, after playing around with some of the settings in both the Nest Thermostat and the Zone Control Panel. In the "Pro Setup" section of the Nest, I ...
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0answers
54 views

Why is the aux indicator on my HVAC system lighting up when A/C is called for?

HVAC novice. New professionally installed heat pump (Goodman) and air handler. Old thermostat from the early 90’s. No aux heater installed. My assumption is the landlord wanted to save money and in CA ...
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2answers
90 views

Decreasing heat in glass porch

We have a glass porch (10ft x 20ft) with glass walls and glass roof, connects to the main building through a door. What is the way to decrease the heat inside the room? Similar to that: We can cover ...
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1answer
38 views

Return air balancing

I have a 3 level townhouse, there is a damper controlling flow to each floor. My main concern is the number of vents on my upper level. One master bedroom (with bath), 2 smaller bedrooms, and another ...
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3answers
91 views

How can I test a radiant heated driveway in warm weather?

I'm buying a house which has a radiant heated driveway (for snow and ice abatement) How can I go about testing it in warm weather?
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1answer
48 views

Help understanding heating system

I recently moved to a new home and I'm a bit confused about the heating system. I seem to have an immersion heater (which uses electricity?), and also something in the kitchen (that uses gas?). I had ...
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0answers
27 views

Honeywell RTH9585WF thermostat behavior with heat pump and Emergency heat

I just installed a Honeywell RTH9585WF1012 to control my forced air furnace system which has: Cool: 1-stage heat pump Heat: 1-stage heat pump (same) + emergency gaz heat from furnace I have a fossil ...
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1answer
627 views

Furnace starts only when R and W are shorted

The inductor motor starts only when R and W are shorted on the control board. The wires to the motor do not have power otherwise. The fuse seems good though I'll be replacing it tomorrow just to make ...
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0answers
35 views

Condo Heating Question

I'm a new condo owner and I have realized my hot water baseboard heaters won't turn off. It's getting hotter where I'm living and when I put my thermostat (old mercury Honeywell) to the lowest setting,...
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1answer
60 views

Tiles on underfloor heating [closed]

I am newbie here but been reading a lot of your comments through this website and thought to finally ask my question. I am looking for the right type of tile to go on top of my underfloor heat pump ...
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3answers
1k views

Should I add air ducts when finishing my basement or rely on space heaters?

I am going have a finished basement of 1000 sq/ft which includes a theater room of 12X16. Currently I am in process of planning in stalling duct work to my basement. I am thinking of not putting duct ...
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0answers
19 views

Is there a way to relieve the pressure on a model 30 expansion tank without draining the system?

I want to change my Xtrol model 30 expansion tank on my boiler. It is not waterlogged but 15 years old and I'm getting ready to sell the house. Plus the pressure has been going a little higher than ...
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2answers
49 views

Can I have independent heating zones with a standard boiler?

We have a new standard gas boiler in our home along with two thermostats, one for the basement and one for the rest of the house (living room, bedrooms, etc). The problem we're having is that the ...
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2answers
30 views

Thermostat for heating and cooling

I have oil fired baseboard heating and a separate AC system. Currently I have two older thermostats installed. I'd like to replace with a single unit, however I can't locate any thermostat that ...
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0answers
16 views

Lennox gas forced air furnace intermittently fails to light burners yet continues to run blowing cold air

Lennox ML196UH070XP25B-05 about 8 years old with an intermittent ignition problem. Furnace will start and run properly 98% of the time. Unfortunately every once in a while (2 known times in 3 months) ...
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1answer
45 views

What could be damaging my furnace control board and/or what can I do to protect it?

I had an issue with a damaged control board a few months ago, replacing it worked, details here: Is it the control board or is it the induction fan? A similar issue has now came up. It's hit or miss ...
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2answers
98 views

Does open stairs between basement and main living cost extra electricity bill?

Does with No door or open stairs between basement and main living lead extra electricity bill, specially in winter, even though entire basement is finished and well insulated ? We want to have open ...
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2answers
63 views

issue with closed loop hot water heating [closed]

So I have an 1880s Victorian in Boston that is proving to be quite the adventure. I'm new to this, so hopefully I am using the right words. I have a four zone hot water heating system with radiators ...
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1answer
61 views

How do i reduce and split hvac duct from 8" round into two rooms

Hi i have small minisplit with 350 cf/m i attached a plenum with 8 inch ridgit round duct attached to it now i need to run it into a bulkhead where one register goes into a small room aprox 12x12 ...
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0answers
32 views

Why does the GFCI protecting my in-floor heat trip when the bath fan is switched off?

The in-floor thermostat (Laticrete, model TH115-AF-GA) with built in GFIC trips sporadically after I turn off the bathroom fan. The floor heat is on a separate 15 amp circuit. The lights and fan are ...
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4answers
663 views

How To Run Thermostat Cable Without Going Crazy?

I've read a hundred questions on this, and most of the answers come down to solutions I've tried that don't work, hiring an electrician, or doing some very messy work. I'm hoping there's some way to ...
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1answer
41 views

Should I get a condensing boiler or atmospheric boiler for cast iron radiator system

I am looking to replace the boiler as part of a basement reno. The house was built in 1903 and has cast iron hot water radiators but we've done a fair amount of work to it, added insulation and have ...
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0answers
19 views

Heating a large main room in Central Ontario with 46' of fixed and operating windows

We are doing a summer cottage into year round home reno. We will be heating with propane powered forced air furnace. We want to keep the floor to ceiling view. The heating ducts will be in front of ...
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1answer
54 views

Can I span a gap between pipes with heat tape?

I have hot and cold lines running parallel to each other. Can I start heat tape on one line and then "jump" 4 inches to the other line to finish the installation in order to use the entire ...
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2answers
62 views

Is there any considerable advantage to a forced air-to-air heat exchanger over just cleverly positioned positive pressure forced air intake?

This is from a typical North Western European housing perspective where most (older) buildings will not have forced air/AC/heat pumps etc. for various reasons, and most houses are only heated using ...
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0answers
34 views

HVAC furnance runs for awhile, stops for 2 minutes, then starts back up and continues to heat until set point reached

I have a Carrier 58GS150 system. At night it is set to 69. In the morning it is set to 72. Recently, I replaced the air filter. The system starts up fine in the morning and tries to reach 72. ...
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1answer
54 views

Are freezers afected by subfreezing temperatures, (weather)

A side-by-side refrigerator-freezer that was in a garage during the recent cold spell in Texas acted odd, the freezer became warm and everything melted. The refrigerator side did not show any ...
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0answers
74 views

I live with my family but I dnt like hot weather, is it ok to seal a vent?

I live with my family but I do not like hot weather. Thus is it ok to seal the vent in the below part?
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1answer
62 views

No water flow through zone of water boiler, all other zones working. How to get water flowing?

tl;dr - How can I get water flowing through one of my zones of a baseboard boiler heat system? I have baseboard boiler heat with 10 zones (5 per boiler). One of the zones (unfortunately, it's our ...
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1answer
56 views

Can I hook up a smart thermostat to a "high efficiency gas forced air heater"? Are there any caveats?

I got some help from folks here identifying this as a gas unit heater. I'm wondering if it's safe to replace the thermostat with a smart thermostat, and if there are any caveats, E.G. minimum on and ...
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1answer
94 views

Does my boiler try to heat water in my tank if it's already hot?

I've got a combi boiler which heats the hot water tank using the indirect method. I use Hive to control it. I'm trying to work out: if the hot water is set to on for an hour, will the boiler ...
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1answer
145 views

Can I get away with 12" round supply and return for 2 ton?

replacing two package AC heat pumps that are 20+ years old, going to convert it to a split system with an air handler inside an insulated closet style box on the outside of the house. Ducts are in ...
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1answer
28 views

Why does my furnace need power resets all the time?

I just installed a smart LUX thermostat and I know it's right but even with my old thermostat it was doing the same thing. My temp will be set at 70 yet its 62 in my house. I have to go to the ...
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0answers
74 views

Taco zone controller - blinking yellow light?

I have a Taco ZVC406 zone controller. This is the type which takes signals from multiple thermostats and uses relays to switch on the heating loop pump. I am using a Honeywell CT87K thermostat on one ...
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1answer
80 views

Is there some official or standard specification for an EK20 fitting?

I'm researching parts for a heating manifold and am confused about what size or type of fitting is correct. More specifically, what the standard size of the fitting actually is. The manifold is a ...
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1answer
232 views

Can I use dedicated pool heat pump for heating water in the house?

I'm going to buy a small heat pump dedicated to pools (around 3.5 kW total output). The pump would not be used for 6-7 months a year (autumn/winter); can I plug it into an existing water heating ...
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1answer
109 views

High pitched whine from either the furnace blower fan or motor

There is a loud whine or scraping sound especially when the 11 year old Furnace Blower Motor/fan starts up. With power off, when I turn the blower motor fan blades by hand they make a scraping high ...
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1answer
32 views

Installing a high efficiency "combi" boiler in an old house

We want to replace the boiler in our basement and have been given conflicting advice about what to get. We have an old house, built 1903, and have hot water radiators. We have already done extensive ...

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