For general questions regarding cooling your home.

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2
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3answers
1k views

Vented vs unvented crawl space

I've asked this question before: Vented vs unvented crawl space However, now that I'm going to get air conditioning the question comes back again and again people seem to have different opinions. ...
1
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0answers
29 views

Re-locating a split system A/C to a different room

I currently have a split system A/C unit in our living room that is really too small for the room. It runs full blast when it's turned on and whilst it does work at cooling the room, it's not ...
5
votes
1answer
224 views

What to use to funnel floor air vent in cabinent for proper air flow

I ripped the "floor" of the kitchen cabinet out to reveal that all along, my vent was funneling air like this, an open hole. The circular opening is about 6 inches across both ways. I need to funnel ...
3
votes
1answer
4k views

Where should I tap in to the existing duct work?

Bought a 1981 repo a year ago. The house measures around 900 SQFT. I enclosed the one car garage (10'x20') @ 200 SQFT to serve as an office. The front of the garage is insulated (10') along with the ...
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3answers
2k views

Advice for replacement/repair of an HVAC with a cracked heat exchanger?

My townhouse has a downflow 1994 Rheem 2.5 ton HVAC unit on its roof (combines both A/C and heat). We have had two issues with the unit and have been in the townhouse for a little under two years. In ...
6
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4answers
21k views

What are the recommended settings for a dual-zone air conditioning unit?

What are the recommended settings for an air conditioning unit that is dual-zone? Meaning, if I have a house that is two stories I know that in Florida they recommend you keep it at 78 F in the summer ...
4
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2answers
2k views

Can I use a swamp cooler to cool an AC unit's condenser?

Swamp coolers work great and use a fraction of the electricity of an air conditioner in a dry climate with little humidity (like Phoenix) but there are downsides like mold and, well, everything feels ...
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3answers
1k views

Assuming you can go either way, is it better to install a Multi-split or multiple Split Air Conditioners?

For 2 bedrooms and 1 living room, and assuming you have the flexibility for both options and the total output is the same, is it better to install a Multi-Split 3x1 Air Con System (3 interior units / ...
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1answer
2k views

How to efficiently circulate air to keep room cool?

I live in Indonesia and I have an apartment with a 6.7 x 5m room, which contains a dining table and a couch. In this room are two 1.5PK (13,000 BTU) AC units on the same side of room nearer to the ...
0
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1answer
176 views

Why is my AC blowing from this pipe and freezing up periodically?

I looked under my mobile home and found a hose coming from the flooring. It is blowing cold air out, and it also looks like water has been dripping out. I think that this is normal, but why is all ...
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1answer
5k views

Central air conditioner electrical disconnect amperage

My HVAC guy is telling me I need a 25 amp breaker and a 25 amp disconnect for my soon-to-be-installed central air compressor. I've asked him for more details but he's less than forthcoming. My ...
9
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1answer
6k views

How can I further diagnose my central air conditioning compressor fan motor and capacitor?

I have a 15 year old Bryant Central Air unit in my house. Yesterday it stopped working. Here is what I have checked. The breaker in the basement is not tripped. The furnace works fine from the ...
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0answers
33 views

Is my heat pump's condenser fan motor bad? [duplicate]

The other day my AC stopped working. I'm thinking the condenser fan motor has gone bad (unit is ~10 years old). Here is what I did to troubleshoot which led me to believe it was the fan motor. ...
3
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1answer
4k views

Is it OK for air conditioning condensation to drip right next to the house?

Our house has a 3/4" PVC pipe coming out the side which drains condensation from the central air conditioning. It drips at what seems like a normal rate. Taking a wild guess, I'd say a gallon per day. ...
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3answers
798 views

Using Window AC as Wall AC

I just moved into a new apartment and they have a 25"x 15" pre-built wall sleeve for a wall AC unit. Not knowing the difference, I purchased the extravagantly less expensive window AC unit that has ...
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1answer
1k views

A/C Condensation from duct getting into drywall

My A/C unit has ducts that run to the second floor, into the attic, to feed some ceiling vents. Today, after several days of brutal humidity, I noticed paint blistering, and in one spot bursting, ...
0
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1answer
680 views

Is this a thin window air conditioning unit?

I'm trying to put air conditioning in my master bedroom. It has a loft and hence high ceiling with around 500 sq ft + 350 (loft). It is also on the third floor which is pretty high. As far as I can ...
2
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2answers
366 views

How can I prevent my clothes dryer door from fogging up?

When I turn the air conditioning on in my house, the inside of the window in the clothes dryer door fogs up. Also, if clothes are left in the dryer, they become slightly damp again. How can I prevent ...
1
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1answer
453 views

What would cause a hardwired smoke alarm to give one short beep when appliances are turned on?

I have hard wired smoke detectors. I've noticed that when I plug my tablet into a power strip connected to an outlet in my living room it caused the upstairs detector to emit a quick beep. I now ...
2
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1answer
2k views

Is it possible to control the speed of the fan on my central A/C unit?

I have one of those medium sized AC-units (don't know the model name at the moment) and a very basic Honeywell thermostat that the installers put in when the house was built. However, there doesn't ...
11
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7answers
14k views

How do I reduce how much the sun heats up a front room of my house?

My office room is in the front of the house and facing south. It gets hot very fast during hot days (even in spring). It is a fairly small room and I have computers there attributing to heat. There's ...
2
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0answers
302 views

How can I insulate and elevate an A/C line set on a flat rubber roof?

The Scenario An apartment building with a flat black rubber roof. The A/C condenser is on a platform on the roof with an air handler inside the unit. The line set runs across the roof for about 20 ...
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0answers
66 views

How do I maximize light gain and minimize heat gain for my glass wall?

How to get maximum benefit of daylight while optimizing air-conditioner benefit for a glass wall (currently) of size 11' * 8' (total 88 square feet exposed). Facts: The glass wall never gets direct ...
6
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1answer
2k views

Why do my lights dim, when my neighbor's central AC turns on?

I understand that the lights would dim with a dryer or large AC on my own circuit system, but is it normal for that to happen when my neighbor's central AC turns on? I validated the timing (hearing ...
6
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2answers
9k views

Is it OK to leave window opened and air conditioner ON (cooling) at night?

At night temperature outside is usually lower than temperature set on AC. So looks like conditioned air should not leak outside (if it does, it is replaced with even colder air) and it is fine to ...
7
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2answers
32k views

Can I power my air conditioning with solar energy?

In my house I have 3 small air conditioning systems running at 8000 BTU/hour each. I would like to power them with solar energy. I found that I would have to generate: 3.41 BTU/hr = 1 Watt 8000 ...
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2answers
2k views

What could be causing this leaky evaporator problem?

My apologizes if I do not know the correct terminology for some of the parts. I will try my best though. We have a Trane A/C system that is causing us a headache. It is causing water damage in our ...
0
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2answers
1k views

Does reverse-cycle airconditioning in heating mode dry the air?

I understand that when cooling, an AC unit condenses water vapour from the room, and results in dehumidified or drier air than outside. When in heating mode, I would expect this not to happen, as the ...
2
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2answers
3k views

What type of air conditioner can bring in outside air?

Car air conditioners usually have the option to choose circulate on/off. What about house air conditioners? For instance, does a window air conditioner exchange air inside and outside the house?
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1answer
107 views

How can I replace an air conditioning thermostat?

I have ducted air conditioner with a control panel in both bedrooms and the living area that only has a thermostat. Is it possible to replace each of these easily (and inexpensively) with a timer to ...
4
votes
2answers
6k views

What should I do about a central air duct leaking above my ceiling?

My closet ceiling is leaking a brown liquid. Right above it is an air duct for my central air. I think the liquid is dirty or rusty water that has accumulated in the duct. I can hear it dripping ...
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0answers
93 views

Why doesn't my A/C get power when using the alternate C-wire thermostat hook-up method?

I changed my old Honeywell thermostat for a new Honeywell WiFi thermostat. I installed it just as the directions stated. I used the alternate C-wire method as the old unit did not have one. ...
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1answer
125 views

Is a single ductless HVAC system more efficient than two smaller ductless systems?

I have an 809 sq ft stand-alone room with concrete slab and block walls that needs to have AC and heat. We have windows on all sides, 8' ceilings, and live in Florida. The room will be used as a dog ...
0
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2answers
2k views

What could be wrong with my A/C unit?

I just installed a new compressor fan on my outdoor A/C unit. Before the fan went bad, it was working fine and had just had its annual service check (the service guy said the freon was fine, ...
1
vote
1answer
515 views

What could be causing my air conditioner to make a humming sound?

I have an air conditioner that has an in-floor intake. When the heat pump turns on, there is a fairly loud humming that comes from the intake. If I step in certain places around the intake the ...
6
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7answers
2k views

Should I apply car wax to the outside of my air conditioning unit?

Through different conversations with family members and friends, I have been told that it is good to apply a coat of car wax to the outside of the air conditioning unit frame. I assume that this is to ...
2
votes
2answers
7k views

Does turning the air conditioning on and skipping its “fan” setting damage the air conditioner?

Air conditioning units nowadays allow you to switch it from "off" to various levels of "cool" without requiring you to "fan" setting first. Is there any reason to use "fan" setting (such as for ...
4
votes
3answers
1k views

How can I redirect the discharge of my forced air vent?

An AC/heating register on our kitchen ceiling blows air directly toward a gas cooktop causing the flames to flicker. Adjusting the register doesn't seem to make a difference. I've looked into air ...
0
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1answer
509 views

How do I use a vaporizer/humidifier? [closed]

An attic has been converted into a bedroom and it's very uncomfortable to sleep in, the air is very dry. I bought a humidifier but it didn't come with instructions. This may be a silly question but I ...
2
votes
2answers
506 views

How can I add ventilation to my room?

My room is 3×5 meters, it doesn't have a ventilation pipe connected to it, so the air becomes close very fast, and to freshen up the room I have to open the window, and it makes my room very cold. ...
0
votes
3answers
433 views

furnace for central air heating, as what for central air cooling?

In my apartment, the heating and cooling seems to flow through the same central aid conditioning system. The device used to heat the air is called the furnace. I wonder what the name for the device ...
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vote
2answers
899 views

Is a Heat pump / AC unit considered more or less effecient in hot states?

Just learned a house we purchased has a heat pump vs a traditional heater. The heat pump / AC unit configuration outside, blower inside. We live in the phoenix AZ area, and an efficient AC unit is ...
3
votes
3answers
38k views

How do I install an air conditioner on a horizontal sliding window?

There isn't a great amount of literature on this subject it seems. I have an air conditioner, the manual assumes that you have a vertical sliding window, but I have one that slides horizontal, so how ...
3
votes
2answers
2k views

Is there a through-the-wall A/C that works with external thermostats?

Our two-story A-frame house only has duct-work downstairs in the crawl-space, with vents in the floor. It gets quite hot upstairs during the summer, but because the square footage of the upper floor ...
6
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4answers
1k views

Why aren't Geothermal heat pumps more common?

Air conditioning and heating are major energy consumers in American buildings - commercial, residential, and industrial. I have been curious for a while as to why it isn't more common to use the ...
2
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3answers
3k views

How can I improve hvac air flow to my attic?

Two years ago I converted the attic of my 1.5 story house into a livable space. It had no HVAC ducts going up, so I ran some coming from the basement where the furnace is. Air flow to the attic via ...
3
votes
1answer
926 views

Will a board blocking my air conditioning break it?

I have a central air-conditioning system in my rented flat. There is on massive machine on my balcony which blows out hot air when the air-conditioning is in use. The hot air is so powerful that it ...
4
votes
1answer
4k views

How can I prevent water from collecting near the blower fan blades of a portable air conditioner?

I have a GE portable Air Conditioner (APH10AA). It's about 10 years old (I guess; we got it used). It works good (blows cold air), but in the last year or two it's regularly been getting water ...
2
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1answer
437 views

What is involved in sizing and designing ducts and ductwork?

I have a one-story house, and it looks like it would be easy to run new ducts myself in the attic. What should I know before trying to design a duct system myself? I have seen ductwork that's metal ...
4
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2answers
4k views

Do two 5k BTU air conditioners produce the same cooling power as one 10k BTU unit?

Could you interchange 10k BTU air conditioner with 2 5k BTU air conditioner and get the same result? Or is there a reason why buying one 10k BTU air conditioner is better than having 2 5k BTU air ...