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0
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1answer
19 views

Blower fan works w/ heat “auto”, not with a/c “auto” or on “on”

I've read the posts with the opposite issue, which have been helpful (you guys are amazing!) but still no solution. Problem is that the blower fan does not come on when system is on "Cool" and fan is ...
1
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1answer
38 views

Close Garage Door?

My wife insists the garage should be closed in the summer, because we run the AC inside. However - when leaving the garage closed, temperatures reach roasting levels better suited for cooking than ...
7
votes
1answer
79 views

Rheem Heat Pump A/C Mode Delay Cycle In Hot Weather

I have a Rheem 15PJL48A01 heat pump which has been working correctly for years, and is maintained properly. It is hot here currently and so it is operating in cooling mode. Yesterday and today, it ...
1
vote
0answers
11 views

How to add extra 24VAC wire (C wire) [duplicate]

I have recently bought a Honeywell rth9580 programmable WiFi thermostat. Unfortunately I have old electric heating/cooling system probably from 70's. The system is based on two relays (I guess ...
1
vote
1answer
46 views

What is causing this air-conditioning unit to cool on cold days?

This is a temperature log from a reverse cycle air conditioning system that has run fine for getting on for 30 years. It has suddenly started to blast out cold air on days when it should be heating. ...
0
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2answers
32 views

Changing from 2 ton to 2.5 ton AC

Friend wants to give me their puron systems 13 sear 2.5 ton AC that they replaced. It was still working fine but 10 years old they wanted to change it out. I currently have a York 2 ton unit that ...
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0answers
20 views

How to avoid heat when using a dehumidifier?

I bought a Stadler Form Albert. When not in use the RH is 75% nowadays, and 30C. Room is 18m2. If I let it run a couple of hours, it gets down to 50% but at the cost of heating the air to ~35C. ...
0
votes
1answer
615 views

Does running a dehumidifier with an AC unit save money?

I've done as much research as i can an every site i hit seems to have a different story on my question: "Will a dehumidifier save energy while running your AC through the summer"? The ones that say ...
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2answers
191 views

Options for a small, single room AC with no windows, no drainage possibilities, and not water vapor based

There is a room in our apartment which we use as an office that is always 10 to 20 degrees warmer than the rest of the house. The apartment is cooled using a standard central AC, however the room in ...
0
votes
0answers
128 views

Would increasing the size of the A/C duct for my kitchen improve cooling?

As part of an ongoing kitchen project, I'd like to relocate the existing a/c register in the ceiling (which is located next to an interior wall) to the center of the room and upsize the duct (and ...
0
votes
2answers
27 views

add a temp gauge or “dimmer” to cabinet fan

I have an AC cabinet fan cooling a cabinet that warms with 2 CPUs and a couple external hard drives in it that are on 24/7. However, the fan runs furiously fast and loud and it only really needs to ...
0
votes
0answers
60 views

how to cool your roof naturally?

I live in the multi floored gated community house in South India with the ceiling exposed to sun.On addition to this my windows are not exposed to open air. In summer it gets really hot as the hot ...
0
votes
1answer
394 views

Central Air duct does not blow

We moved into a new house last year, the central A/C works great for all the rooms (even for closet) but we have a problem in just one room. There is almost no air flow coming from that room's air ...
1
vote
1answer
239 views

What could cause a heat pumps line sets to be the same temperature when running?

The symptom I'm dealing with is that the heat pump system isn't cooling as much as it should. Tested it today, was about 79°F inside and outside; system was blowing air at about 73°F. ...
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vote
2answers
139 views

What are the external airflow requirements for portable and window AC units?

I have a window well in a basement where I'd like to setup a portable AC unit (~10000 BTUs). There is a cover that I need to keep in place to avoid water collecting in the window well, but I could ...
2
votes
4answers
760 views

Apartment on the top floor gets very hot - cheap, eco friendly ways to keep the place cool?

I have an apartment on the top floor of an apartment building (the community roof is right over us). In summer, the place gets very hot! I can't start a community garden upstairs and am dying with the ...
0
votes
1answer
1k views

Is it possible to use add-a-wire with my current configuration to add a C-Wire? [duplicate]

I only have four wires: Red, Blue, Yellow, and Green. My old thermostat jumps the R to RC and leaves C empty. I have a new thermostat that wants 5 wires, but I don't have C. I am not sure what the ...
1
vote
1answer
78 views

Is infrared blocking film effective in reducing temperature inside a room?

I was going to put a foil on windows, but found a film that is alleged to reflect rays from infrared spectrum, thus preventing 60% of sun heat of entering a room. Any criticism on it? Or personal ...
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8answers
6k views

How do I keep my house cool especially my terrace during summer?

I live in Bangalore in an apartment on the top floor and during summer, my terrace (built of concrete) absorbs a lot of heat. When I come home and switch on the fan, it ends warming my room and it is ...
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votes
1answer
1k views

Need help running and connecting a 'C' wire to my new thermostat [duplicate]

I have a Laars gas boiler that has 3 heating zones; basement, 1st floor, and 2nd floor. I want to replace the old mercury honeywell tstats on the 1st and 2nd floor with newer honeywell RTH9580 wifi ...
2
votes
2answers
928 views

Does our main air intake need an electrostatic filter if our furnace already has one?

We have an electrostatic filter on our furnace right where in main air intake connects. We recently had our ducts cleaned and they told us we also needed to have our main air intake cleaned (an extra ...
2
votes
2answers
563 views

Why do air conditioners have thermostats, not humidistats?

I've noticed it over the years in various living quarters: an inside A/C temperature setting that's appropriate and comfortable for a given outside temperature is quite unbearable when the outside ...
1
vote
2answers
88 views

Finding the temperature sensors in a room [closed]

It feels very cold in my workplace. They set the temperature to 70F which is below the comfort level, and it is a nuisance to wear a jacket all the time. I am thinking of locating the temperature ...
0
votes
2answers
166 views

Why does my HVAC begin vibrating and stop cooling at night?

I am calling a HVAC technician since this is probably too complex a problem for me, but wanted to hear some possible diagnosis. The symptoms are as follows: The A/C is working well during the day ...
2
votes
1answer
101 views

How can I cool an under the counter icemaker?

We have a Subzero under the counter ice maker. During our hot summer days it really gets hot and slows the ice production down to a crawl. We thought we would install a cooling fan on the wall behind ...
2
votes
1answer
237 views

sealing off sunroom to a/c in summer

what's the best way to seal off our sunroom so we don't pay to cool it? It's really humid AND hot in MS this time of year (avg 90+ F). We have a very "open" house, with a large dining room connected ...
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3answers
1k views

How can I cool down a hot garage?

My North Carolina garage is extremely hot, does not have a window and a room over top. In 5 years I have lost three freezers, there is no other place to put the freezer. I have tried to find a fan w ...
1
vote
1answer
159 views

Does the amount of air noise generated by a portable fan depend on blade design?

Forgetting about motor noise, are all household fans such as window fans and table top fans equally noisey? Is there a type of blade or grating that is quieter than others for the same amount of ...
1
vote
0answers
89 views

How do I troubleshoot my central A/C?

It's 79 outside right now. It's been running for hours and it's remaining 79 inside. I'm in a brand new 2 story home in Monroe, OH. It has rained a lot recently but I just feel like it should be ...
3
votes
1answer
183 views

What are low-cost ways of cooling down a room? [duplicate]

How do I cool a bedroom - that has a ceiling & standing fan, but is still hot? Ideally, the cheaper the better. I live in Jamaica - where the climate is warm most of the time, and the summers ...
2
votes
1answer
524 views

What is the name of these silver curtains used to reflect heat energy back outside?

Some people use aluminum foil to reflect heat on windows but I find it very depressing and bad-looking thing. My Chinese friends use 台州涂银反光窗帘布 but I have no idea what it is in English: they translated ...
1
vote
2answers
252 views

What low (or no) cost method can I use to shade a south-facing wall from summer heat gain?

I live in a rental in Tucson, Arizona. The southern wall is thick and has thermal mass but never gets cool enough at night to prevent having to run the A/C to make it bearable. This is killing me with ...
2
votes
1answer
2k views

How can I block off scorching sunlight from coming through my windows?

Somehow, the window of my room faces directly at the scorching beams of the sun all year long. The local weather here is humid, and the heat from the sun coming in from the windows makes the room ...
1
vote
1answer
289 views

How can I consolidate different heating/cooling systems into a single system?

I have 3 different types of heating/cooling systems that I inherited. Hot water heat. This heats the whole house/garage via 3 zones. Zone 1: Kitchen/Livingroom Zone 2: Bedrooms/Bath Zone 3: Garage ...
0
votes
0answers
606 views

Why isn't my mini fridge staying cold?

My mini fridge has full power, but I come home after a couple of days to find that the compressor has shut off and everything has defrosted and the fridge isn't cold anymore. I can turn the knob and ...
2
votes
3answers
2k views

How to prevent incandescent light bulbs from heating up the room, safely?

Currently I have ten 60W incandescent light bulbs heating up my room, very little ventilation, and no ideas on how to stop them from making the room so very hot. If I had other lighting option, I ...
1
vote
1answer
705 views

How can I straighten bent refrigerator radiator fins?

I'm a little worried about the reduction in airflow... should I be? And if so, how should I straighten the fins?
2
votes
4answers
3k views

How can I measure the r-value of a wall?

What is a reproducible test to measure the r-value of an exterior wall? Or even a specific spot on a specific wall? It needn't produce an absolutely certain result, but a good estimate with known ...
3
votes
4answers
11k views

Is there a window or portable AC system I can use with an awning window?

My bedroom gets ridiculously hot and I taped tin foil over the window. It didn't help much. I'm thinking of getting an air conditioner but the ledge on the window is small and the window doesn't open ...
5
votes
5answers
5k views

Should I open the top or bottom of double hung windows?

I'm a new home owner and was wondering if there is a "right" way to use the double hung windows in the house. Should I open the top or bottom? Is there a seasonality to it? Does it even matter at ...
2
votes
1answer
2k views

What type of motor do I need for my attic fan?

My attic fan motor appears to be on the fritz (makes a buzzing sound and the fan tries to turn but won't make it more than 1-2 revolutions without sticking). I'm trying to figure out what type of ...
6
votes
4answers
3k views

How do outdoor mist-cooling A\C units fare in real-world usage?

I live in Phoenix where summer outdoor temperatures regularly exceed 110°F and humidity around 15% or lower is not uncommon. In this environment a mist system can easily pull the temperature down ...
8
votes
1answer
8k views

How do you trigger the HVAC with wiring only?

I have a HVAC that has the usually wiring C R G W Y Pinouts What wires do I need to connect to turn on Heating? What wires do I need to connect to turn on the A/C? Is there a risk of damaging any ...
3
votes
2answers
5k views

Can I use a stairwell ceiling fan to save energy?

We have a two story house, with a small ceiling fan mounted above the main stairway. The house has separate thermostats for heating/cooling the upstairs and downstairs. During the day, we spend 90% ...
3
votes
3answers
6k views

Natural ways to keep the ceiling cool during summer

I live in the single floor independent house in South India with the ceiling exposed to sun. In summer it gets really hot. I am not an expert but was wondering if there is a traditional/natural way ...
3
votes
3answers
12k views

Cheapest way to heat and cool a converted garage?

I'm converting my two car garage into a home theater and was seeking some advice on the cheapest way to heat, cool, and dehumidify the room. Here are some details: Garage was once a model home ...
2
votes
1answer
2k views

How can I prevent heat loss through heater/air conditioner wall units?

HVAC experts out there... I live in Wisconsin and it gets mighty cold here! I have a condo with 2 wall units that are used for both air conditioning and heat. My heat bill in the cold winter months ...
2
votes
2answers
3k views

Why would ceiling fan reverse air flow without me changing directions?

I have this exact ceiling fan, and so far it has worked nicely. It is mounted in my bedroom, I believe height to floor is about 12 feet and the rod from the ceiling to the actual fan is about 18 ...
15
votes
4answers
18k views

Why don't programmable thermostats automatically switch between “Cool” and “Heat”?

While I can set my house to be a particular temperature, I still have to manually switch it between "Heat" and "Cool" mode, and this seems to be true of every thermostat (programmable or not) that ...
3
votes
3answers
527 views

Shading windows from outside (awnings, shutters, etc) to keep house from overheating in summer

The back of my house faces west, and during July and August, the sun hits it directly in the afternoon through evening. On a warm day, this can cause the house to heat up quite a bit, so I'm making ...