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Great Vid, Maybe get some boot lace ferrule for the cables, will neaten them up more and also provide some protection against a possible short.

45⁰ supply air sounds really cold. Especially with the vapor line at 47⁰. Am I wrong?

I'm wondering if you could elaborate on where you're supplying power to the Shelly monitor. You mention the terminal block and something about after the float switch, but I wasn't sure if you just wire it to the terminals or need to splice the wire into an existing line?

Very cool! (Pun not intended) I’ve been looking for commercial products that could do this but they were all either unusable junk or very expensive. I was exploring an Arduino based solution but this is so much cleaner and has an app already built. Thank you!

I assume the sensors are waterproof as this would be a great hot tub freeze warning system

You lost me on having to build this myself… should just offer them for sale

He is my bast teacher . Ty Thank you.

Pretty cool...no pun intended. I did similar with an Arduino some yrs ago but with exceptions. I thought I could sell it as a remote monitoring system to local HVAC companies. An early warning system of sorts to alert HVAC co's before their customers saw a problem. My system included a couple pressure transducers on each line as well as temp sensors. I included a wifi module & system voltage sensors as well. It worked pretty well with my home system. Much like a FieldPiece gauge systems does. I found my local HVAC co's weren't interested in this so I gave up. It's nice to find that I wasn't alone in my madness lol.

Great explanation! I know this is an example, but isn’t 55 db/55 dew, 100% humidity?

Another gadget I'd like to build, then find 6 mos later I never use it for anything.

What are you using to collect, analyze, and act on the data? Home assistant or is there some basic data platform that Shelly provides?

Hi Tim, most home inspectors typically just do a quick Delta T calculation on A/C to get a very general sense of any problems. Obviously, that doesn't always tell the whole story. I'm trying to determine if doing a non-invasive test in measurequick with smart probes could be a viable option during a home inspection to go a little further in determining the functionality of a system, before recommending an HVAC professional take a look at issues. Can it work well for that application without a previous benchmarked system? I would love to hear your thoughts.

Oh 😅 this is for HVAC techs. Ok. Makes more sense

“And that’s it”. Lol you make it sound so easy….

Really great content. Consider adding affiliate links in the description for all the products. I like to use them because 1) I know I’m ordering the exact product used and 2) it helps you as the content creator. Super cool and keep it up!

i just made a similar but not remote, away from home, sort of thing my self with 2 dht22s and an esp32 to monitor how my ac is running when changing fan speed settings. I like to see humidity as well as temp to determine optimal fan speed settings for de-humidification

Very cool!

Nice. Thanks 😊

Good stuff Tim. Also wondering if I could do a conversion of mmwc- pascals since that’s all my Fieldpiece manometer measures.

I had this on my hvac for about a year and it works great :)

Curious if the 24vAC transformers in the furnace output enough current for the extra load. I can't believe how inexpensive the temperature probes are! Please consider doing another video showing us what to look for - potential problems, etc...

RUclips recommended this video to me and I'm glad it did. I'm a huge fan of home assistant and data tracking. I currently have Temp/humidity sensor in each room and I track the power draw of my hvac system and compare performance that way. What are the benefits of knowing this data? What sort of analysis could a residential home owner do on this data to know how the system is performing? Thanks so much for posting. I'm ordering parts as we speak!

I didn't know I needed this until now! lol

Great idea! I can definitely think of a couple uses for this.

Saving this!

I like this 👍

You plan on adding any more videos with the dg8? I bought mine about two months ago this ago, was mainly planning on using it to confirm duct leakage in houses. Only used it a hand full of times, though.

How can I speak with you about a manual D and help with equipment? We already have the manual J. Thanks!

From this demo, it takes waaaaaay to long to run a load, running around adding walls. No Thanks, measure all the windows, block load and move on. Also, still referring to them as “Master Bedrooms” is a No No. Main Room, Main Bedroom, we don’t have slaves and we are not Masters. Just a pro tip on language as we adjust to our customers.

Great topic! I have had this exact debate with a few of my peers. I despise "loss leader" sales. It's hard to break what people are used to, as proven by JC Penney years ago. But I've also found that simply being honest and upfront with theirs and our expectations, goes a long way. If you're willing to guarantee what you promise and stand by it, then price is typically not an issue to those that understand and appreciate the service. And of course proving the results makes all the difference.

Another great discussion & EDU. Cheers!

I am in agreement. Although my business model is a little different than yours, my service call fee is a little bit higher than a number of other companies out there for the same reason as you mentioned in your video. I'm not trying to get everybody as a customer. Some of the other companies that are charging very low diagnostic fees will not even correctly diagnose the real problems with the system and will be quick to push a whole new system on a person.

First law of thermodynamics, "There's no such thing as a free lunch", thus you get what you pay for. The HVAC industry has become so predatory and many contractors will use the low introductory service fee to get in the door so they can rip you off. That's what you're competing against. I was in the business for over 30 years and it took me about 5 years to figure out what you said in this video. Unfortunately, when you're just getting started and don't have the reputation yet, you almost have to eat some crow from undesirable customers until you can build a good reputation and customer base. You can pick your friends, you can pick your nose, but sometimes you can't always pick your customers. Be grateful you've arrived at a place in your business that you can afford to turn away undesirable customers. Congratulations.

What a year that was! 🤩

Why don’t we ever get absolute humidity in the reports? Relative seems like it needs to come with additional info about how much the air can hold..

Straight to the point ❤️

Sorry, its a nice unit but the dba is 50 at 3 feet

Very interesting! Thanks for doing these Tim!

ACCA manual J is correct for a large majority of the population about what they call so-called comfort window. But then there’s a large majority of the population who is on the other two sides of the comfort zone Who finds 75° uninhabitable. The only time I felt 75° was comfortable and my son is the exact same as me is when we were in Arizona in the summertime and humidity was 8%. Because neither of my son or myself have ever been in 8% humidity, we both were surprised and very delighted to find out. We can actually be comfortable at 75°F.. but it had to be 8% humidity. Even in low humidity for myself and a few others like us 75° is extremely hot and we sweat like pigs if we do any movement at all. Even in low humidity out here in California San Francisco .

Really important information here and as you touched on balancing small rooms is critical.

When you say that it only allows a single user login, does this mean you can only be logged in on ne device? I'm fine with sharing one login for different devices, but we each need to br logged in our own phones.

Thanks for this video Tim! I was looking at a Coolcalc load I ran and noticed it gave me a humidification GPD number to maintain my desired rH selection. My question was; “is really an accurate thing, does Man J really assist in humidifier selection?.” Answer, yes it does! 🙌 Pretty dang sweet! Especially for this particular one because I blower door tested this home too, so more accurate. 👏 Thank you again so much for making this video. It’s hard to find good resources sometimes.

Thanks Tim, that's a wonderful explanation!

Can this detect leaks like 410a or r22 if its in the lineset or coil?

What program was that?

I don't like Gatorade because it has high fructose corn syrup 😁

Than what happens is the installers rush and don’t do things properly then us service guys end up going over there and spending a few hours straightening things up at no charge so it’s a double whammy all the way around.

Preach it brotha

Agree 100% Since I started in the trade 23 years ago, it has been this way at every company I've worked at. I started in installation. Still do them now from time to time. I would add, not only is it inconvenient to the home owner when the guys work that late; it's also a huge inconvenience to the installers families. They all deserve better! From the client, to the installers and the installers families. We have to do better. #BetterHVAC

For newbies, one word of warning, specially, with cheap nitrogen regulators, even sometimes good ones Diaphragms and spring adjusters were never meant to be accurate at such low flow rates, and during the middle of your abrasion, occasionally the diaphragm will move all by itself, and either cease the flow of nitrogen in the middle of your brace or it’ll open up a little bit more and a little bit of excessive pressure Nitrogen pressure in the pipe because it cannot release fast enough to the valve core opening, pushing against your brazing, making a hole or a push through into silver liquid brazing rod with the excessive pressure These large high-pressure nitrogen regulators were designed to work at greater pressures . And that small little one extra step of adding the flow regulator is designed for my small pressures and flow rates that are precise and will not turn off or during the middle of your procedure Just a cautionary note to pay attention to to see if your particular regulator is extremely sensitive that can change all by itself in the middle of your operation like turning off the nitrogen One method you have an extremely low flow of nitrogen tap the back of your regulator diaphragm with your wrench or screwdriver and just a little bit . And all of a sudden, your nitrogen pressure pop up giving you too much flow or completely shut off then you know you have a regulator that cannot be used for this particular situation . Second note, very sensitive parts of your skin for testing extremely small flow of nitrogen is the skin on your upper lip below your nose coming out of your hose or the skin just under your eye around your face extremely small flows of air . Of course you would not be trying to adjust airflow with your eye stuck towards the opening that could possibly jet out high-pressure and blind. You have to say that because I know common sense is not common anymore.