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Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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7
votes
2answers
24k views

How do I install a portable air conditioning unit in a large sliding window?

I have a large sliding window that is 53 inches top to bottom and I want to install a portable air conditioning unit. The kind that don't sit in the windows but vent to the window. The window ...
20
votes
4answers
379k views

What's the most common cause of A/C refrigerant lines freezing?

I noticed my house wasn't getting under 75°F this weekend when I had the thermostat set for 70°F. Since I'd done a lot of drywall sanding inside recently, my first idea was to replace the filthy air ...
5
votes
3answers
5k views

How can I improve ventilation in my room with a window fan while filtering pollen from a nearby tree?

This is a campus building in Aalto University where you have a tree about 10 cm away from the window. The Espoo city does not allow the student organisation AYY to cut down the tree. There is a poor ...
3
votes
2answers
16k views

Is a little ice on the cooling coils ok?

This is our first summer in a new house which has central air. It was a bit hotter today than normal so the AC was running for a long time. After awhile we noticed the airflow stopped because the ...
3
votes
6answers
22k views

Air Conditioner Can't Keep up

We just rented a condo and our A/C cannot keep up so it will run almost constantly. It can't even keep the temperature constant, it will creep up into the 80s even while running. I measured the ...
18
votes
10answers
30k views

Do thermostat-controlled, auto-adjust HVAC vents exist?

The residential forced-air HVAC systems I have seen are controlled by a single thermostat in one room. One has to manually adjust the vents in order to adjust the temperature in other rooms. Is ...
11
votes
1answer
114k views

Why is my air conditioner tripping the circuit breaker?

Our air conditioner recently stopped blowing out cold air. When I went to check on it, I noticed that the outside unit wasn't coming on. We had had problems with ants in the contacter in the past, ...
1
vote
2answers
462 views

Is an Ionizer Air Purifier effective against birch pollen?

I spot an Ionizer Air Purifier Air Cleaner Air Ionizer and I want to understand whether it could help to alleviate symptoms due to birch pollen particles such as itching, tiredness and shortness of ...
8
votes
6answers
107k views

How often should I run a bleach and water solution through condensate lines?

How often do you need to run a bleach and water solution through the condensate drain lines (of a heat pump) to keep the bacteria away? What are the recommended parts (e.g. 1 part bleach, 10 part ...
7
votes
2answers
9k views

How do I install a jump duct?

Our master bedroom is considerably warmer than the living/dining/kitchen area of our house, and we've been setting the thermostat quite lower than we'd like in order for the bedroom to get cool enough ...
9
votes
2answers
8k 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 ...
9
votes
5answers
107k views

How much cooling can I expect from a central air conditioner?

Yesterday's high was 106.0F, low of 79.2F, full sun all day. AC set at 78F, indoor temperature reached about 85F. Today's high was 105.4F, low of 81.1F, full sun all day, now about 102 at 7pm. AC ...
3
votes
2answers
183k views

Why do the evaporator and suction lines freeze when there is low refrigerant?

In an AC, why does a low refrigerant condition cause the evaporator, and/or suction line, to freeze up?
3
votes
2answers
1k views

Are clogs in the AC condensate drain common in Florida?

I have a two year old central A/C unit. Every 2/3 months the unit shuts off. I called the rep/maintenance company and they have given me the following response: The cause of the issue is algae ...
2
votes
2answers
2k views

Combining Air Conditioner with Air Purifier

I have a small 5th floor flat, with high ceilings. The sash windows, which are tall, face south. There is a very busy road underneath the windows. Two rooms have these windows. It's noticeable that I ...
0
votes
0answers
72 views

Portable air conditioner question

I've picked a portable HVAC unit. It's a 2.6 KW 10,000 BTU model. The only way I will be able to vent it is by cutting a hole in one of the glass windows and and using the special fitting. I wanted to ...
0
votes
3answers
795 views

One portable air conditioner - want to use it in two rooms

I have a Kenmore portable air conditioner model - 408.72012. this particular model can be housed on the outside of the building and the A/C air is vented into the inside space (normally through a ...
9
votes
5answers
102k 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 ...
11
votes
7answers
32k 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 ...
9
votes
6answers
133k views

How can I stop my lights dimming when my Air Conditioning turns on?

I have no noticeable problems with my house's electricity, but when my Air Conditioner kicks in (and here in Central Texas, it kicks in year round) my lights dim for a second or so and then run ...
6
votes
7answers
159k views

Should I insulate air conditioner coolant pipes?

I recently replaced some rotted insulation on the coolant pipe that runs out of my AC unit and into the evaporator in my house. When cleaning inside the actual AC unit itself I noticed that the ...
5
votes
13answers
25k views

Solution for A/C Condensate Drain Line that doesn't require emptying a bucket of water every day?

I have a split A/C system in a room that runs on low 24 hours a day during Summer that unfortunately cannot be connected to any drain or pipe and which therefore requires a bucket outside to be used ...
4
votes
3answers
1k views

90% Humididty @ 23 Celsius direct from Air Conditioning Outlet

I have a mold problem in my apartment, in certain areas there is condensation. I believe I have traced this to the air conditioning, in the apartment the humidity will vary from 60% to 85% RH at a ...
2
votes
4answers
37k views

How can I install a window air conditioner in a metal window frame?

I'm trying to install a window unit air conditioner, but most of the installation instructions don't seem to work with this window configuration. A little bit about the setup: The apartment is the ...
2
votes
3answers
1k views

portable air conditioner exhaust

I have a problem similar to this: How can I vent a portable air conditioner when there's no window? I do have windows but I cannot modify them. Cutting holes in walls or any similar ...
9
votes
3answers
47k views

How does low freon cause the compressor suction line to freeze up

There are many questions about air conditioner issues with the most common being that it isn't cooling properly. Among the typical answers are low Freon and the standard diagnosis for low Freon is ...
6
votes
5answers
32k views

Can a homeowner without a Section 608 EPA license legally connect his own gauges to his own air conditioner if the unit uses 410a refrigerant?

It has been suggested by at least one moderator on this site that EPA Section 608, which restricts who can purchase and handle refrigerant, including who can connect a set of manifold gauges to a unit,...
5
votes
3answers
62k 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 ...
4
votes
1answer
5k views

Mounting a window air conditioner on top of a sliding horizontal window

I need to install a window air conditioner in my master bedroom. However, the only suitable window there is a horizontal sliding window. To complicate things more, I need to place it on top, since my ...
4
votes
3answers
7k views

Why is the upstairs a lot hotter in a 2 story duplex?

I've lived in my current duplex for about 5 years now and every summer, my upstairs portion of the duplex gets noticeably hotter than downstairs. I couldn't give an exact measurement but 10 degrees ...
3
votes
1answer
361 views

How can I determine which MERV filters would be best for my air handler?

I have a Carrier 3.5 ton, 1/2HP air handler (Model Number:fc4bnf042). I have been using MERV 13 a/c filters for a few years now because my son has allergies. I recently discovered that the higher ...
3
votes
1answer
236 views

How can I install a window air conditioner and still allow the window to be opened?

I want to install a window based air conditioner but still allow for the ability to open the window when needed. I was thinking of using a piece of wood screwed into the window frame to support the ...
3
votes
2answers
11k views

How do I replace a condenser fan motor in a central air unit?

The condenser fan motor on my central air unit has seized up (tried like crazy to turn it it, but no go). I'm not sure how old the motor is but I'm guessing it's original, so about 12 years old. I ...
3
votes
2answers
2k 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 ...
3
votes
7answers
38k views

Air handler condensation draining problem

For the life of me, I cannot figure this out. My air handler and heat pump were installed in 2006 and work great. For the first summer since I've owned the home, condensation started to not drain ...
3
votes
2answers
64k views

How do I install an air conditioner in a larger window?

I have a brand new AC in the box which was meant for another room, but recently had a baby and her room is too hot. I want to use the AC I already purchased, but the max window width is 36" and the ...
2
votes
2answers
44k views

AC Unit Blow Warm Air Indoor But Colder Air Outdoor

I have two AC Units. One for upstairs and one for downstairs. The upstairs one works just fine but not the downstairs. So, i did a test by turning both units on and went outside to compare the two ...
2
votes
2answers
6k views

How can I reduce heat transfer around my window unit air conditioners?

I have three old window units in my house and they function as my A/C. I am concerned about the amount of heat seeping into the house and cool air leaking out around the A/C units themselves. They're ...
1
vote
2answers
386 views

Must my new air conditioning unit be 3 feet from the wall (or positioned backward)?

My contractor installed this system yesterday, at my property: "Trane T4TTR6060C1000A RX16 5 TON XR16 A/C 16 SEER rating R410A". Everything is working fine. I just do not like aesthetically how he ...
1
vote
3answers
6k views

Vent a portable air conditioner with a 6 inch hose through a 3 inch hole in the wall

I bought a new portable air conditioner for my condo. I bought this one: a/c. I want to use it to cool either my living room or my bedroom. My apartment is 1100 sq. ft. so I believe this should be ...
1
vote
3answers
17k views

A/C not keeping up

So, the first warm-ish day of summer finally showed up in the Black Hills yesterday and I noticed that our central air conditioning was not really keeping up... the thermostat was set at 72, but the ...
1
vote
2answers
102 views

Are BTU's only calculated using square feet?

I'm building a 16'x20' storage building with a barn roof, so it's pretty much a 2 story area. Will I calculate the BTU's using 320 sq.ft. for my window unit? (Not for heating, just cooling.)
1
vote
2answers
3k views

New condenser fan motor burned out

AC technician replaced my condenser fan (through a home warranty service). The new fan worked for 5 min and stopped working after that. the fan motor was extremely hot (180F or more) The old fan motor ...
1
vote
1answer
42 views

The top A/C drain in my attic is leaking. Why?

My dad told me that the top A/C drain (we have bottom and top A/C drains) was leaking, and he wanted me to find out why it is happening. Our A/C system is from Ruud. So what is causing the the top ...
1
vote
1answer
117 views

Portable Air Conditioning Venting

I don't have a window and was wondering if I can vent a portable air conditioner down the heating vent for the room?
1
vote
3answers
8k views

Do I really need 10 AWG wire for a AC condenser that says 15 AMP max?

I'm buying a used AC condenser for a rental property. The unit says max amps = 15 (see below), however the HVAC guy tells me I want a 20AMP double pole breaker with 10 AWG? I would have though 15 AMP ...
0
votes
3answers
308 views

What affects air quality indoors after home improvement?

We installed a new A/C in the corner room of our house a little while back, because we wanted to use it as a nursery. Installation went fine and the little one sleeps in there every night. A few ...
0
votes
1answer
423 views

How to get cold air from one room to another

This is the very rough outline of my flat: +----------+ |Bedroom | W \ +---+----------+ |Ba |Living |lc |room |on | |y | +---+----------+ There is no window on the living ...
0
votes
3answers
18k views

My AC is set to 77F and the thermostat reaches that temperature but the AC keeps running. Why?

My AC is set to 77F and the thermostat reaches that temperature but the AC keeps running. What could be the causes for this? This is in connection with this post How long should it take to a 1.5 tons ...