Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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12 views

Transfer grills as a return to the basement vs ducted cold air return

So I have an open return in my central air/heater in the basement mechanical room with no cold air return. I've had zone balancing problems and a bypass that's always on because of the pressure. I'm ...
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1answer
47 views

Which location would be better for my this type of room to install split air conditioner?

I'm from north India. I have to install a split air conditioner (see example). So I'm wondering what location in my room would be better. My room dimensions are roughly 10 x 12 x 10 (Length x Breadth ...
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2answers
50 views

Can I control a heat pump and boiler heat with one thermostat?

I want to swap out the old air handler for a new one and the old straight AC for a heat pump. I will not be putting a heat package in; I will use my boiler as the emergency heat. The boiler is in the ...
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1answer
22 views

How can I make a finished attic cooler and all bedrooms comfortable when central A/C is shared between 2nd and 3rd floors?

I have a 3-floor house with central air. First floor has its own A/C. Second floor and finished attic are a single zone. There is an open staircase between the first and second floors, and a ...
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1answer
58 views

How can I find all the air leaks and insulation gaps in my finished attic?

I have a finished attic which gets hot very quickly, requiring running the central AC excessively and due to the imbalance, the downstairs tends to get too cold while the finished attic is still too ...
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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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2answers
46 views

Should I upgrade my evaporator coil when a I get a new furnace?

We are about to start adding a 400 sq feet addition to our just purchased to-be rental property that is 1000 sq feet, so 1400 sq ft. total. The property is in NE Ohio, so we get heavy snow and cold ...
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57 views

What was this doing on my return air vent and why did it prevent installation of a filter?

We purchased a new home a little over three months ago. It had a rooftop AC unit installed in probably the late 90s/early 2000s. We were unable to have this tested during our inspection because the ...
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2answers
86 views

How to attach valve to fridge compressor copper pipe without torch? [closed]

I'm trying to make a vacuum pump to pump my car's AC system. I have a fridge outside with r600a gas. I am wanting to take out the compressor and use it as a vacuum pump. I don't even know if the ...
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39 views

Can I vent my bathroom with Air Return Grilles?

My apartment’s small full bathroom is about 50 sq ft, and there was an old Non-Vented Air Recirculating Fan in the ceiling. It died but there was still moisture/mold/mildew issues when it worked. I ...
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1answer
42 views

Can't find SEER rating for Bryant Split AC system

I own an older house with a hot water heat system and I am want to get a Split AC system installed. The setup involves 2 9,000 BTU units, one in each 2nd floor bedroom and a 12,000 BTU unit on the ...
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2answers
230 views

Can I vent portable air conditioner into the garage?

I have a bonus space that is attached to the garage that we use as a home gym. I want to be able to run a portable air condition when working out. It will only run 2-3 hours a day and probably only ...
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2answers
137 views

What is this pipe? It leaks when the sink runs

I have a pipe that is halfway under a door jamb and inside the concrete floor which when I run a the sink water is now coming out of it. This pipe is next to our AC blower unit inside the basement. I ...
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1answer
30 views

Water Droplets Forming Inside AC with Irregular Air Flow

We've been using a Hitachi Split Inverter Type Air Conditioner for over a year now, and we recently had it service cleaned about three months ago (the recommended schedule is every eight months). ...
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19 views

Geo thermal air conditioning by natural air circulation

I live in the Caribbean and during the hottest evenings the temperature is around 86 degrees. We use conventional air con in the bedroom set at 80 degrees. The air temperature in the ceiling is much ...
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1answer
72 views

Are air coolers as effective as air conditioners?

I'm planning to buy an air cooler as it is less expensive to purchase and operate than an air conditioner. Are there any air coolers that can achieve same, or close to, the cooling effect that an air ...
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1answer
20 views

Venting for a single exhaust Portable AC

Ever since I got my Portable AC, I've been wondering how I can make this chunk of junk more efficient because till this day, I have never been able to drop the temperature lower than 25 degrees ...
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0answers
17 views

Extra valves on AC lineset?

I'm installing a mini-split system in my shop, but realize I’ll probably need to move the outdoor unit in 6-12 months. Does it make sense to try to add a pair of valves to each line to allow them to ...
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27 views

Carrier inducer motor wiring

I am working on a carrier roof top unit, I need to replace the inducer motor. The old motor has 2 wire, black and blue, and I have got the replacement parts for it. The new motor comes with yellow, ...
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1answer
36 views

How do I add a filter to the return air vent of my retrofitted forced air system?

I have a 1940 home with a basement and a forced air heat pump system that was added some time in the past decade by the previous owner. The ceiling in the basement is open, and the ducts were ...
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1answer
30 views

AC troubleshooting

I’m suspecting an upcoming issue with my split AC system. Currently it is working and cooling, however in the last week or so, I’ve noticed that after the AC reaches the set temp, the copper line ...
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1answer
30 views

Right-Angle Adapters and Plug for Air Conditioner Exhaust

Full picture of AC with exhaust tube. Exhaust port through window. As shown, I have an air conditioner which has an exhaust hose which moves out hot air through the window and outside. I did a ...
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1answer
38 views

Air intake for a condo apartment

I am renovating a top-floor apartment (gutted it entirely & rebuilding everything). With new windows and doors, spray foam insulation etc, the space is becoming quite air-tight. I will be putting ...
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1answer
30 views

Zoned Forced Air System Runs 2.5X Upstairs vs. Downstairs

I bought a house built in 2005, ~4100 sq. ft. Reasonably insulated to code, as required in Chicago, IL. I've got an upstairs thermostat and downstairs thermostat. Both are Nest thermostats ...
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1answer
92 views

Where would I connect the C wire in my HVAC system?

I'm upgrading the thermostat with a Eco Bee WIFI one. Where do I connect the C cable? (Rheem 15 to 20 years old.)
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2answers
46 views

Two zone hvac on single compressor [closed]

I have a two zone HVAC system with two compressors (A and B). When I run the heat on Zone 1, it uses compressor A and when I run the heat on Zone 2, it also uses compressor A. When I run the A/C, it ...
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1answer
83 views

HVAC Condensate Line P Trap

I've consistently experienced issues with my AC. I won't get into all of the background, but I would like to know if the pictured condensate line is appropriately trapped. The vertical PVC pipe is not ...
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1answer
79 views

I live in the Northeast area of the US, and my emergency heat on my furnace/ac is broken. Can I get thru the winter months without fixing it? [closed]

I live in the Northeast area of the US, and my emergency heat on my furnace/ac is broken. Can I get thru the winter months without fixing it?
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18 views

How do I calibrate a Totaline thermostat?

Our thermostat is not reading correctly how can I calibrate it? I searched the Totaline site and it seems like this particular product is not listed (and I can not find the model of this product), ...
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1answer
31 views

Need to determine the correct start capacitor for hvac unit

I need to replace the start capacitor in my HVAC unit and I don't see any identifiable markings on it. This unit also has a heat pump. I believe this start cap is for the heater. I found the part ...
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1answer
77 views

Installing ductless units in my apartment. What am I supposed to do with all these coolant and drain lines?

I'm installing 3 ductless AC units in my apartment. I know the lines are supposed to go outside and connect to the condenser but there are three coolant lines wrapped in insulation and three drain ...
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2answers
38 views

What is the right A/C contactor part that I need?

I need to replace my A/C contactor, but I'm not sure what exact model I need for the new part. I took two photos showing the Brand and model number of it but when I search it on Amazon, I cant seem to ...
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2answers
391 views

Is a bathroom required by code to have a window or exhaust fan?

The Fort Lauderdale, Florida unit is on the top floor and there is a duct for the unit's central air in the bathroom, but it doesn't have a window or exhaust fan. Is this not to code? What are my ...
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55 views

Thermostat C-wire not working

I recently switched out my old thermostat for a new thermostat. The previous thermostat had an R, Y, W, G, and C wire. I plugged all of these wires into the same ports on my new thermostat. After ...
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28 views

How to best position a dehumidifier

Want to ask about the best orientation for a portable dehumidifier to allow cloths to dry the quickest. Take this top down drawing of a portable dehumidifier as an example: Air inlets are at the two ...
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32 views

Finding the Right Heating\AC Thermostat

I have a thermostat in my house that seems to have a very narrow temperature band. This causes it to cycle on and off more frequently that it probably should. I have noticed that when I set the ...
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22 views

Goodman AC inside fan will not work at night

My Goodman AC unit is about 4 years old. In the past few months, during the night the outside compressor will kick on as required but the inside fan will not run. The outside unit will continue to ...
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1answer
15 views

HEPA filter for GE portable air conditioner?

I have a GE portable air conditioner like the one shown below and am trying to determine whether there exists (OEM or otherwise) a HEPA air filter I can install in/on this device. I am unable to ...
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1answer
63 views

Why is an aircon with 34000 BTU cooling capacity uses less current than a 14000 BTU unit?

I plan to buy aircon but have a question. My friend office has 2 aircons. Both 220 volts. 3 toner 34000 BTU cooling capacity with 16.4 A rated current. Stand unit model Carrier CP-A280MA. I cant read ...
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33 views

Compatible filter for a Hiyasu HR-24LA HVAC unit?

We bought a house with the A/C installed. We found a lot of dust, and realized that the filter was entirerly missing in the indoor unit. I have found it in the Hiyasu catalog, and I found a manual for ...
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25 views

Air conditioner blows erratically

I have a Samsung split air conditioner and the internal unit blows unevenly; I take off the lid that contains the filters and stops doing it. I remove the filters, reinstall the lid, and blows ...
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1answer
30 views

Is it worthwhile to replace evaporator coil?

My AC condenser is done for and needs to be replaced. The evaporator coil is 15 years old and still working. I could get both replaced at once, or just replace the AC condenser. Doing both will cost ...
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2answers
126 views

What's the point of AC fan speed?

Does higher fan speed make the room cooler? But then, if the thermostat is set at a certain degree doesn't the AC keep the room at that temperature regardless of what speed the fan is set on? What ...
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1answer
72 views

Installing Ecobee 3 Smart Thermostat in Apartment

I live in Scottsdale AZ and I just purchased an ecobee smart thermostat. I’ve tried multiple ways when wiring up the thermostat. I followed all instructions closely. Can anyone help. The new ...
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2answers
62 views

How best to isolate dirty power caused air conditioners or other motor driven devices at the dirty device itself?

I have two air conditioners that are the source of some voltage fluctuation/line noise in my home. The two A/C's running at the same time is definitely and unambiguously at fault. This is primarily a ...
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19 views

How to run new exterior A/C drain line

I'm trying to replace my A/C drain pipe. It was draining into an old PVC pipe contraption that did nothing - water was leaking all over the brick and foundation. I pushed the PVC to the side and ...
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3answers
361 views

AC related power outage (partial)? HVAC?

So running into a weird situation that I have not encountered before. Back ground - house was built in the late 60/early 70s - 3 bed 2 bath So we have a weird situation where our house is partially ...
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4answers
96 views

Can I keep mold out of wet rags?

I am cleaning windows (small business) and that generates a bag of wet dirty cotton towel rags each day. I wash the rags each day, and need to store those until the end of the week, when I take the ...
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48 views

Is it a good idea to blow hot air through drywall?

I have a small room with no windows and I want to cool it down. A friend of mine suggested me to get a portable AC, create a hole in the wall (drywall) and put the exhaust hose through the wall. This ...
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33 views

AC not blowing cool air, Contractor said HVAC unit is perfectly fine and that it has to do with my smart thermostat (Ecobee 3)

So basically I changed out the filter on my HVAC unit (National Comfort Products, Model CPG41238-U23) and after I did that the AC stopped blowing out cold air. It was working completely fine until I ...

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