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Inverter technology is certainly a great step forward, but not all applications really need such technology. Once any brand comes out with a product using new technology, all other brands are going...

I can't keep up with who owns who anymore. Midea does seem to be a decent product. I installed one years ago when they first started marketing in the U.S., and as far as I know, there's never been...

Since so many brands are just private labeled product manufactured by another company, it is difficult to know exactly what brand one may be installing. For example, any Nordyne brand is actually a...

ADP is a Lennox owned company, so Trane just doesn't want to support Lennox.

Having a physically larger coil than furnace is a good thing. The opening on bottom of the coil being larger allows for better air flow. Back in the day, all coils were larger than the furnaces. We...

The builder grade Goodman heat pumps I have in my class have crankcase heaters and two accumulators, one attached to the compressor and one stand alone. Also piston metering for the outdoor coil....

It's been a rough few years with leg ulceration from my venous reflux disease, but had surgery just before Christmas and it looks like the skin graft is taking even though I am still testing positive...

I'm just running into having to address this in my HVAC class for Thaddeus Stevens College. For many years now, there has been no differences as long as the cooling requirements and compressor...

That's completely unacceptable.

It's nothing personal. We all have spent a lot of time and money becoming HVAC professionals, so we do tend to get a bit testy at times. Also, there is the safety factor. We really do not want anyone...

That does it. I've been hammering on my guys the past few weeks before they graduate, so they have not been instructed properly how to do all the things now required. Back in the day, we just gave...

This link doesn't work for me. Is it still good?

LOL!

My students aren't comfortable taking advice from a baby.

Yep, I was one of the early members when Don started the site.

They could have sung A Pirate Turns 40 twice. Then again, you may have forgotten they did it the first time by the time they got...

You make me feel like a kid. Thanks!

True, it is just a number. Unfortunately, the higher the number the more doctors I have and the ways I am in pain. Getting old is not for the meek.

Wow, you are old. You got me by 3-4 years. I tell folks I'm still in my thirties. I am currently thirty-thirty nine.

I've been called MacGyver many times over the years. My best MacGyver moment was traveling home from a weekend of camping while it was raining. We were traveling in two vehicles on Rt 70 when the...

Which version? The original version with Richard Dean Anderson was in 1985. Hell, I was getting on to middle age even then.

McGiver is an amateur. In fact, he isn't even real. It's just an actor pretending to be good at improvising. Look it up, I wouldn't pull your leg on something this serious.

Things have changed since I held your elite position.

AFU becomes FUBAR when we try to fix it.

He is one of my adult HVAC students. I have emailed Mikey and Terry already, but will also forward to the committee email.

emanual84 is one of my HVAC adult students who just needed to make a post to be able to be made a pro member. I have been his professor, so he has suffered enough.

Carbon and other oxidation forms at soldering temperatures. That is one of the reasons we need to use flux. Since absolutely no flux should ever enter the inside of the copper tubing, carbon deposits...

No equipment manufacturer sanctions not sweeping nitrogen when "brazing", which is the only type of connections designated by all manufacturers. They don't make this stipulation for no reason. The...

Again, has no bearing on whether or not a connection is going to fail. I've come across plenty of failed soldering joints, but not one braze joint that failed after having been initially successful.

Temperatures required for soldering also cause carbon on the inside of copper. If we are not brazing correctly, will we really solder correctly?

There is no way brazed copper is weakened to any degree that could be harmful. This is something created by those who sell solder.

What do the manufacturers of HVAC equipment recommend, and why? Brazing with 15% silver is always going to be better and safer for the system than using anything that requires a flux.

If the worst that is going to happen is you need to put on a sweater or use another blanket, and you are good with that, the only other reason for supplementary heat is to CYA if the heat pump isn't...

Two pressure switches can be used for a variety of safety factors. Two stage furnaces need to have two pressure switches. There are some furnaces with sealed combustion that use a pressure switch to...

Thanks. I'll check into this. Unfortunately my issue is some sort of disease that causes the veins and arteries to basically just stretch out and collapse. If taking a vitamin helps, I'm going to...

I prefer my coffee kick me in the butt rather than coming out of a butt.

Maybe it was my coffee that caused my wife to leave:whistle:

LOL on the stents. I have really crappy arteries and veins. The arteries in the heart they just keep putting stents in to hold them open. They were put in during three heart attacks. All of the major...

I just use Folger's regular ground which I sprinkle cinnamon over the coffee grounds before brewing.

Thank you, good sir. Lots of changes in my life over the past few years. I am now working as an adjunct professor teaching a job ready HVAC program at Thaddeus Stevens College in Lancaster, PA. My...

I don't get it.

R454b is being pushed by Carrier and R32 is being pushed by Daikin/Goodman. Both are listed by ASHRAE as being A2L, which is a new, lowered flammability rating that is supposed to indicate only...

I can't agree more. Indoor air quality has become worse due to tightening up of homes and introducing a lot more VOCs in the everyday products we use. Ozone reduces VOC's extremely well but must be...

I never said I thought they would be unreliable. I insulate all liquid lines in attics because they absorb heat from the attic, adding heat load to the system. These things make cleaning a dirty coil...

I'll take $50 worth of connectors over having to haul my acetylene tank into an attic and have to braze under usual attic conditions.Then again, that's why there are different ways to get to an end...

The reason for insulating them in a liquid line is the same reason we should always insulate liquid lines in attics especially when the filter/drier is located at the A/H in an attic. Heat travels...

Like I'm afraid of a breakfast cereal.

Came across this thread while investigating this quick connect system after having used them in my HVAC class. Just wanted to see if anyone was using them...

Thanks, it's been quite a couple of years. As part of my semi-retirement, I've taken a position teaching an adult HVAC course for a local college. Still doing some consulting as well, but really...

They will definitely come in handy when we need to clean a super dirty coil in an attic unit. Isolate the line-set from the outdoor unit, cut the coil out of the attic air handler, clean the coil in...

Going well, for an old man. Supposed to be retired, but had to show income along with SS in order to refinance my house after Lisa left me. So now I work full time as a Lowe's Electrical Pro as well...

During the past 12 years since writing my posts on this subject, I have switched to the other side of the argument.

The Schrader valve is there as a quick and easy access to the system. The valve...