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Questions tagged [air-conditioning]

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1answer
72 views

Should storm windows be left open in the summer to reduce hothouse heat gain?

During the summer is it more desirable to have storm windows open, partially open, or closed? I have old wooden, single-pane windows with aluminum storm windows and I have installed energy film on ...
5
votes
1answer
81 views

What is the actual efficiency of an air to air heat pump in the winter

We are looking at air to air heat pumps (aka reverse cycle AC units) to replace our existing electrical heaters. Air to air heat pumps claim a COP of 3 or 4 to 1 in the manufacturing literature. ...
2
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1answer
54 views

Portable AC or Dehumidifier?

I currently am a recent graduate and I am living in a place that does not have AC. I am looking to buy a portable AC or to buy a dehumidifier. I currently live in Minnesota and sleeping at night when ...
7
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3answers
183 views

Temperature equalisation throughout the house

We have been living in our home for a year now, so have seen both summer and winter, and we are now looking to solve the heating and cooling problems we have. Heating The walls and roof of the house ...
5
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1answer
49 views

Heat Recovery Ventilator HRV, metal vs paper core?

Which one is more efficient and has longer operating life, thin metal or nano paper core in a HRV? It will be used in a Nordic country. TL;DR I'm searching for a heat recovery ventilator. I am not ...
3
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1answer
102 views

How large should be solar panel to power air conditioner?

Solar panels are more efficient in sunny regions, but even in places that receives less sunlight, there are hot days when electricity consumption peaks because of air conditioning. More sun = warmer ...
1
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1answer
51 views

Mechanical damper built in to vent fan?

Are there any bathroom fans or range hood fans that have a mechanical damper built in that fully seals when the fan is turned off? In other words, it shouldn't let any air in OR out when the fan is ...
3
votes
1answer
64 views

How do I keep my room on the first floor cool all day and night?

I live in a duplex bungalow. The room on the first floor is about 250 sqft but has only two windows of 12 sqft each. The roof is at 10 ft level. The roof is open to sunlight and is used to dry clothes ...
6
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3answers
88 views

Why refrigerant cooler is more popular than evaporative cooler?

When I look at how houses/offices are cooled in my area I see that refrigerant cooler is far more popular than evaporative cooler. I did not find any company which serves evaporative cooler services/...
8
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1answer
113 views

How to benefit from air-conditioning water

I'm doing research on the water of the air conditioning, and a dissertation on how it could be collected and where it could be used. I already started by collecting some figures and I did some ...
8
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2answers
4k views

Heat Pump vs Air Exchanger, What's the difference?

I hope this is the right place - I'm looking at buying my first home in a climate where a heat pump would make a significant difference on our energy requirements for heating and cooling. I've done ...
5
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2answers
143 views

Notifications for outside temperature negating need for air conditioning

How can I get automatic notifications that the outside temperature (in Sydney CBD) is below a certain threshold, and therefore the best option is to turn off the air conditioning and instead open the ...
1
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1answer
62 views

What is the difference between Geothermal HVAC and Heat pump?

What is the difference between these two renewable energy air conditioning systems?
7
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3answers
4k views

Most fuel efficient way to run AC in my car?

More of a curiosity question, but I'm trying to figure out the most fuel efficient way to run the AC in my car, assuming I must use AC. I already know when to open windows vs use AC, so I'm looking ...
8
votes
2answers
117 views

Would saving winter ice for summer A/C be more energy efficient?

Scenario 1: Ice blocks are harvested from frozen river in early January, then stored in underground cellars. When summer comes, the same district heating network is used for circulating cold water. ...
4
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2answers
875 views

Can you drink condensation water from air-con after treating it?

My question is about using condensed water from air conditioners. Can this water be treated with reverse osmosis plants and ultraviolet so you can use it? How pure will this water be? If this water ...
9
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2answers
224 views

How effective is free cooling

I live in the tropics, and during the summer it is very hot here. Today the air temp was low-mid 30C with 80% Relative Humidity. I live close to a stream, which I'd like to use for free-cooling. ...
4
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2answers
3k views

Running aircon and window fan to blow cigarette smoke out, consequences?

I smoke in my home office room which is 20x30 feet. I have a wall mounted 12000btu aircon in the wall, and want to put a window fan, one of those 10 inch high and as wide as the window with twin fans ...
4
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1answer
295 views

Which one is more sustainable: central A/C or window A/C?

I would like to know which kind of cooling will be the most sustainable, that is, will use the least energy and cooling agents. I am considering summers with temperatures in the high 90's (35-37 ...