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There are 29058 articles in 2917 discussions. See the most recent and the best rated articles in HVAC Discussions

The most recent discussions

Central Cooling Question

October 16, 2017, 3:29 pm

Over the weekend I had a chance to tour a large central chiller plant at a university. They had several electrically driven chillers with centrifugal compressors. It was all very high tech with... Read more »

Is it legal to sell Freon 22 on Craigslist?

September 20, 2017, 1:42 am

I'm in Oregon, USA. I have about 20# of Freon 22 that I've had for decades. Don't think I'll ever use it. I'm getting conflicting information on whether it's legal for me to sell it. It's probab... Read more »

Brandon new WindowS AC

September 1, 2017, 2:15 pm

New LG 12000 BTU unit set at 72. Cools 500 square foot den well. However it cycles every 3-5 minutes. Is this normal. On 3/off 1 Read more »

6AWG connecting to a 30 Amp breaker

August 16, 2017, 1:52 am

I am replacing my air handler in the attic with a newer and more efficient model located in a closet on the ground level. I will start at the main panel for (hopefully) some clarity. 60 Amp breaker... Read more »


August 15, 2017, 7:42 am

According to the latest AC newsletter...R22 has some new regulations coming up. I personally thought R22 was a dead issue to be replaced with substitutes or newer equipment. -- It is hardly to... Read more »

AC Condenser Unit Relocation

July 5, 2017, 4:23 am

One of my neighbors, as part of a backyard renovation/landscaping project, will be moving their condenser unit from a northern exposure, to eastern exposure. It is a 5 ton unit, and probably 2-3 ye... Read more »

dielectric cooling of computer clusters

June 28, 2017, 9:58 am

One company that I worked for has converted their computer clusters to dielectric fluid cooling. Not sure who kitted them out, but one such vendor is: http://www.grcooling.com/energy-2/ Now what... Read more »

TXV valve replaced, reversing valve replaced, lines flushed and a/c still i...

June 27, 2017, 11:43 pm

Our central air stopped working about 6 weeks ago. We have 6-7 year old Tappan unit. We were getting air through the vents inside but the air was not cool and the compressor outside wasn't running. W... Read more »

Ac issue

June 19, 2017, 4:51 pm

I have an air exchanger in a walkin crawl space. One of the ac vent feeds about 6 ft. from the exchange has mildew around the outside foil ventilation pipe insulation. What is causing this? How can... Read more »

Looking for A/C info - Tonnage and SEER rating

June 12, 2017, 1:08 am

I am under contract to buy a home that has an older RUUD unit. The model number is Uead-1415j. I have tried finding info online on this unit and have been unsuccessful. Does anyone have specs on t... Read more »

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The best rated discussions

6AWG connecting to a 30 Amp breaker

rating: 5

I am replacing my air handler in the attic with a newer and more efficient model located in a closet on the ground level. I will start at the main panel for (hopefully) some clarity. 60 Amp breaker... Read more »

Oil furnace flue has green stuff dripping down?

rating: 5

I have a newer 2002 80% efficiency oil furnace. I do not know much about HVAC but I'll try to explain as best I can. A steel exhaust flue extends essentially straight up towards the roof. About ... Read more »

Trane furnace radio/TV interference

rating: 5

Several months ago I had a high efficiency Trane XV90 natural gas furnace and heat pump installed. Since the weather has recently been cold enough for the gas furnace to provide heat, I have been ex... Read more »

No power to Thermostat + Electric baseboard heater

rating: 5

I have a electric baseboard heater in my bathroom which does not work. I just bought this house, so no idea if it ever did. I opened up the thermostat and checked to see if the thermostat received an... Read more »

Advantage of Azeotropes?

rating: 5
  [ 2 ]

I can figure out what azeotropic refrigerants are, but not why. What's the advantage? Or is is just a way to get the boiling point of non-CFCs to match the older CFC single-component refrigerants?... Read more »

swamp cooler pan that leaks.

rating: 5

Twice I put black tare in bottom pan making sure it doesn't leak, still does. Pretty old cooler still working, it's a small swamp cooler 1978 Read more »

The use of JET A for Fuel Oil Furnance?

rating: 5

------------------------------------- I know this sounds wierd but I'm a helo Mech. and get fuel sample every day and have a 55 gal drum full about every year. Jet A is the same as disel fuel just f... Read more »

Price gouging

rating: 5

Some idiot in the legislature has decreed that people are not allowed to charge more during times of emergency. As a result, there is no profit motive to buy a generator, or drive to work when it's ... Read more »

Need your expertise

rating: 5

Can you guys tell me if the data in the section: GSZ130241A* / AR*F182416** on page 18 of http://www.goodmanmfg.com/Portals/0/pdf/SS-GSZ13.pdf is strange for R410? Look at the Hi/Lo pressures for out... Read more »

Which Motor -- GE vs A.O. Smith?

rating: 5

I need to replace my 1/4 HP 230v 1075 RPM outside condenser fan motor. The current motor is a FASCO, but I can't find a FASCO dealer near me who sells to the public. I can get either a GE or an A.... Read more »

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