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Heating Ventilating and Air Conditioning
Total questions 9900
Why is there moisture on walls in the winter?
Moisture in the air condenses on the cold surfaces.
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My radiators in the bedrooms are cold and don't heat up but they are warm and toasty in the rest of the house we have oil heat any suggestions?
I assume that you are referring to hot water radiators, heated by an oil furnace. These radiators could have air in them and...
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How warm does it have to be outside to turn on your central air?
OUTSIDE TEMPERATURE IS IRRELEVANT WITH THE PROPER LOW AMBIENT CONTROLS ON THE OUTDOOR UNIT. SOME STANDARD RESIDENTIAL UNITS NEED...
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How do you purge a home water heater?
If you have a water heater, particularly a gas one, you will need to purge your system if air gets in. This can happen when the...
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What are the R- values of standard Batt insulation?
See Weblink
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Gas floor heater from the 1950s It needs a new pilot generator can it be replaced witha modern part or am you out of luck?
I Have gas floor heater from the 1950s. I am in the middle of a rebuild right now. I went down to a Plumbing supply Co. and...
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How do you wire a baseboard heater?
Wiring a baseboard is no different than wiring a plug or light. A simple picture in your mind is this. You have to imagine...
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How do you dehumidify a clothes dryer vent?
A clothes dryer vent should not be very humid. If it is, it may be clogged. Clean the dryer vent once a year to prevent this...
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How do you calibrate the thermostat on the wall not on the heater itself for in wall forced air heaters?
If a thermostat is not working properly, you cannot calibrate it. It must be replaced.
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What is the purpose of hvac system evacuation?
evacuation removes and non condensables from your hvac system such as air or moisture
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How do you convert 6912 cubic feet to btu?
To convert Cubic Feet to Btu's, multiply by 1,000 1 CF = 1,000 Btu's 6,912 CF X 1,000 = 6,912,000 Btu's
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How should a room be ventilated for a wood stove?
Ventilation- No, combustion air- Yes. Locate combustion air as close to the stoves combustion air inlet(s) as possible. An...
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What is the name of the most powerful type of fan?
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What is the cost of hot water using oil?
With heating oil at $2.89/gal and nat. gas at $1.61/ therm, using an 80% efficient oil vs: a 80% Nat gas heater, 1 million btu's...
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How do you calculate heat gain for air conditioning?
Hire an Engineer
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Why that they has to always make Window Air Conditioners?
Because, their will always be Houses that is Too Old for Central Air Conditioning.
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How do you wire a 3 phase 4 wire plug does it matter which leg the wild is on?
Of the three conductors the combination is irrelevant except with respect to phasing and rotation. If the equipment requires...
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How do you keep green frogs out of external air conditioner motors?
Try attaching bug screen up and make sure you get all the entrances. I live in British Columbia, Canada and I had a terrible...
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Why would a central air unit quit working abruptly if it was running fine one day and wouldn't turn on the next and the furnace blower turns on but not the AC?
hello, not ease to answer to your question.1-could be the electrical cluch 2-reley 3-burn the compresor 4-freon...
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Do you need two jumpers from your outdoor condensor compressor to the start capacitor if you only have one and does it need 220 or 120 if it is a 40mfd rated for 330v?
Do you have a dual capacitor that starts both the compressor and the fan motor? You need 230V to power the compressor. You...
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Why does your central air unit blow out hot air from the vents?
Your air handler is working but the compressor outside isn't. The air handler is responsible for pumping the cooled air through...
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Is it OK to vent the heat exhaust of a window air conditioner by putting it up against the window and covering the vents with a towel so the heat does not come back inside?
No. In so doing you have reduced to nearly zero its cooling capability.
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How much efficiency is gained by relocating an AC Condenser so that it is not on the south side of the house?
None.
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What can you do if your AC runs all day long but it never gets any colder in the house and you have two rooms on the west side of the house that are about 10 degrees warmer?
Several possibilities: 1. AC system is not fully charged or otherwise not functioning efficiently. 2. AC system is not...
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How do you fix a Coleman catalytic heater model 513B?
Un screw top from base. Remove wick tube. Cut 1/4" off of top of wick. Soak wick in denatured alcohol.
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Why do many homes in Arizona have AC units on the roof?
These are probably evaporative coolers, also called swamp coolers. They cool by evaporation. In dry climates they are very...
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Why is cooling a house more expensive than heating it?
It is not always the case that cooling is more expensive than heating. It depends on the type of system you have and your utility...
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How do you add freon to your air conditioner?
Unless you have an EPA certification card, you are not allowed to buy refrigerant. Therefore, you should not try to add...
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Why is it saving more energy if you put insulation on ceilings or attics?
Because heat rises, right out the roof.
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Why does my home air conditioner only blow heat?
Your compressor has possibly stopped working. If you are lucky, the serviceman will only have to replace the freon to get it...
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Can R-134 be used in place of R -22 in a central air compressor?
No. Simply will not work
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The hose leading from the inside to the outside of the house is dripping water is this suppose to happen or does it mean that the drip pan is full and it is releasing excess water?
AC units have a condensation line. This is a necessary option as cooling the air causes condensation, much like a cold glass of...
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How do you determine what size air conditioner to buy?
The only way to determine the proper size air conditioner required is to have a load calculation performed. This takes into...
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What does central air size mean?
The size of a central air conditioner is a measure of its' cooling capacity. It is given in tons of air conditioning. A ton of...
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How do you add freon to your home ac unit?
It requires special equipment, and legally, a license to handle refrigerants. I'm not being mean. If you are talking about a...
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Where do you place home air conditioner?
This is really a question of taste, I believe. Which part of your house do you want to be cool? Many people opt for the...
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Is the cendenser outside suppose to be blowing out cool air or warm air?
warm air, the heat is what is being taken out of the inside of the house.
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What is the most energy efficient heater a renter can use in a rented house?
The question is better defined as "What the most energy efficient portable heater?" Because one would assume that you will want...
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What causes an air conditioner to blow air but not cold?
Your ac may have lost it's freon, the compressor or condensor may need replaced, or even a small inexpensive electrical part may...
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How do you fix a window air conditioner that leaks?
Assuming that the leak is refrigerant, not a water leak from a bad seal: Given the cost of a new unit, and the cost of labor to...
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Who invented the gas heater?
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Where can I find freon for home air conditioner that I put in myself and how much freon does it take?
There is no set amount required by different AC units, it may be listed on the mfg. tag on the unit but that is just the factory...
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Window ac has started leaking water inside?
Unit needs to be sloping outside and make sure the drain hole on the outside is not plugged up.
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How do luxaire units compare to the rest?
I have a 28 year old Luxaire oil furnace and AC system. It has worked well and has only required minor repairs and servicing. The...
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Why does my window unit get too cold and not cycle off?
replace t-stat
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New AC unit is causing water to drip from the air vents?
I wonder if the overflow pipe from the pan under your unit is hooked up properly? We once had an intermittent problem that turned...
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Heating and air conditioning account for about how much of a home's energy consumption?
It depends on the construction of the home and the type of system. Typically it is from 30-60%.
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What is a good way to remove ice from your roof?
a good way is to prevent it in the first place. you can do this by first making sure that your attic has good ventilatoin down by...
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How can you stop water from dripping off the air conditioning registers that are located above and away from your central ac unit?
Since I'm not an expert in central air conditioning, this will be a layman's answer. As I understand what I have been told years...
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How do you tell if propane logs are ventless?
if they are already installed look up inside of the firebox/fireplace and see if there is a vent pipe. otherwise refer to the...
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How deep should a gas line be installed?
THREE TO FOUR FEET
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What size furnace for 1800 square foot house?
Go to www.hvacopcost.com/equipsize.html
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Is it dangerous to attach natural gas to an LP valve on a furnace?
Yes this could possibly become a problem. LP gas and NATURAL gas have different properties, such as but's per cu ft, specific...
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How to calculate Household radiator capacities?
@215 deg/f steam you calculate 240 btu/ ft.sq of radiation
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How important is it to insulate forced air ductwork in your basement?
It is important if your basement is unconditioned space. If your basement walls and floor are insulated it is not so important.
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Why is a sewer gas odor coming from the heat vent in the house?
Hi: Believe it or not,, I have actually dealt with situations like this. In most cases the houses have basements or crawl spaces...
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What is the problem if your gas fireplace does not come on even though the gas is working in the rest of the house and you hear a clicking sound?
To me it sounds like your pilot light on the fireplace is out. That could happen from a strong wind coming down the chimney or a...
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How do you get air out of a hot water home heating system?
The hot water is brought through a series of small tubes like a radiator in a car by means of a circulator pump that pushes it. A...
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How much does a gas furnace cost?
I was just checking around myself and looks like it can be anywhere from $3000-$4000 installed. Add $1K if you're going with a...
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How do you install a heat register in a ceiling?
I assume that you alreay have the duct work in place, and the drywall over the duct. The problem is that there is nothing for the...
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Does anybody got experience whether to prefer metal piping or duct board for residential air heating?
Metal ducts cost more to fabricate.
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Why is the Gas hot water tank not hot for long?
The hot water tank might be undersized for your usage.
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How many btus will heat a 400 sq ft area at 75 degrees effectively?
Depending on your load the answer is different. (i.e where you are in the country) In the deep south, its approximately 30 - 35...
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In order to heat a room evenly?
There is no answer!
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What does a solenoid valve assembly in a humidifier do?
Opens the valve to allow H2O into the humidifier
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What is the drop in substitute for r-22 freon?
There is no long term Drop in sub for r-22 components need to be changed for long term use
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Why and how did alice parker die?
september 22, 1692!! september 22, 1692!! its not a good answer!!!!!!11!!!!!!
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How do you put central air in a single story house with no basement?
I have seen retro-fitted houses with the venting on the roof, going into each room. It isn't very pretty, but I suppose the...
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Black Inventor Alice Parker?
is she an inventor? yes
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What do you need for a gas dryer?
Gas line & a 110 volt outlet both preferably within 36`` of the dryers location. And a vent to outdoors.
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What is the freon pressure for an air conditioner?
It changes based on vehicle, outside temp, and desired inside temp. Pressuse depends on ambient temperature, the higher the...
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Is a central AC supposed to leak water inside of a house?
Condensate always forms on the evaporation coil and the amount of water depends on the dew point and the temperature of the coil....
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What is the breaker size for a 10 KVA electric heater?
15 amps
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How do you fix the copper line from the condensing unit if it has been dripping what looks like water?
Nothing. It is water and it's supposed to do that.
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How do you put freon in your home air conditioner?
through the larger suction line at the condenser. you face several problems with that. 1. You must know what type of...
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How do you install a window air conditioner in a vinyl window?
If the window is VERY wide, use a supporting 2x4 cut to fit inside the vertical channels and close the window to the top of that....
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How do heat pumps work?
Heat pumps take advantage of the more constant temperatures in the ground. Usually this means the temperature beneath our feet is...
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How cool should the air coming out of my vents be with the home AC turned on?
The target temperature is 20*. It can vary from that based on conditions, but that is the design. Regards The target...
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No power to home thermostat?
If the thermostat does not have a loose or broken wire coming from your unit than the transformer in the unit may be bad. A...
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Why does your new ac an heating unit keep running and running?
Is fan set to the "on " position instead of "auto" position ???
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What year is freon gas to be eliminated?
Hi, Lots of folks are juggling this question and for good reason. It concerns their well being and pocket books as well. So I...
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Is there a reason for all of my AC vents in my new house directed toward the windows and walls or is it better to have them turned around to blow into the center of the room?
Hi, The system you are describing is often refered to as a perimeter system of duct design. You are lucky to have it if you...
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How do you know if your home thermostat is bad?
if the indicator light is not getting switched off or on
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Would you recommend using oil to heat your home or is electric heat more efficient?
Oil is the most expensive way to heat anything. Check yor cost per kwh on your electric bill- easy way= forget all the blah blah...
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Why does your central airconditioner start blowing hot air only during daytime every three days and needs to be powered off for a couple of hours before it starts working again?
i'm no expert on this at all, but have had it happen several times, and always been the same problem (different homes).......it...
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When to add freon to your home air conditioner?
When the larger copper return pipe is not cold and DRIPPING WATER. But first you have to look at these other parts of the system....
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How much wood do you need for your wood-burning furnace to last the winter?
It depends on how large your house is, and how well your wood stove works. We have a 1,200-sq.-ft. home and we burned about 3...
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What are the installation specifications for installing a 10000 BTU through the wall AC unit?
don.t know if your town has any check with planning com, i have a 18,000 thru the wall just cut a hole and install, put it on...
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How do you bleed radiators?
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How do you stop a Home air conditioner radiator leaking?
if it,s in the furnace, look for a drain pan under the coils, there should be a drain hose comming from it. cold water grows a...
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Do you have parts for a wall furnance Transformer part no AT30 Model s7035st wr62?
A generic 115vac/ 40 va 24 volt transformer will work fine. Mars or Honeywell are the most common.
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How do you remove a house radiator?
It depends on the type of radiator you are referring to.
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Clicking noise in bathroom vent when windy outside?
Usually this is loose vent flaps being blown open and closed by the wind. With the fan switched off take a look at the vent from...
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How do you install a boiler or heater?
The reason this question has not been answered, in most Provinces and states, and in most countries in Europe, home owners are...
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Why is my house too hot?
Turn down your thermostat There are several factors that could be contributing to keeping your house warm. I live in...
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Is it cheaper to leave your AC on all day?
No, it is better to replace your thermostat with a programmable one. You can typically save 10-15% on your bill by using a...
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On a new home are builders required to install air handling units so coils can be inspected?
Hi: Builders Codes vary widely from one locale to another and so does there enforcement. In my area, the code clearly states...
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How do you know if you have a heat pump?
If your themostat has an emergency heat (eheat) setting on your mode selector( Cool Off Heat Eheat ) this is the most common...
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Why are walls covered in soot in the interior of a home?
Usually because of a cracked heat exchanger
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How much does air conditioning freon cost?
$175 for R-22, $275 for R-410A
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