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Another nice video man

Looks like Charlotte is at 65 not 75. What am I missing?

Here in NC as a HVAC service tech without an electricians license, I unfortunately could be fined for changing a breaker 😢

Tim, Does this work remotely? Ex. Install at customers house, go back to office and monitor the Shelly app?

Thanks Tim. Another good video. Hope to see that sling psychrometer come out of retirement next week :).

Hey Pistachio! New sub here. 😎

I have some ohms reading from compressor to ground, but I get no continuity OL to ground, but the breaker is tripping. So question is: Ohms from compressor to gound from any leg should be NONE correct?

Do you share your 60pt inspection somewhere?

okay, you caught my attention. im here from facebook. im about to watch your video okay, questions... 90 degree db but how did you get the 80 dp ? and how do would i get the temperature on the surface of the duct when the db is 90 ? I'm asking cause i really want to know

Thanks for the video… ran into one of these machines for the first time today… wouldn’t you know… a humidity control issue… i am grateful that you have taken the time to share the info you have learned that is not available in the manuals.

The only thing I would say about this video is….. most codes require a minimum of R8 insulation in unconditioned spaces. Other than that, this information is gold!

Commenting before I finish you’re video. But I do residential HVAC just south of you, we were having tons of ventilated attic that didn’t have shield tec sheathing with ducts sweating. It was a nightmare for a few weeks

Great information man, i was wondering if there was a way to lower the fan speed the closer it gets to the setpoint and the reverse staging is perfect for that. I wonder if Nest thermostats have that same feature. Most of my customers love either the nest or ecobee

Have a non spray foam attic with lay in bats insulation. All the ducts are sealed pretty well. Supply ducts are water logged. Besides letting them know not to set the tstat to 40% humidity at 71° would recommending an attic dehumidifier be a good idea?

Another great video! This is a hot topic on HVAC-Talk right now. Interesting how some people are following your idea (and the extended version from the video you recommended to me in the other video), and the others think the exact opposite idea is the way to solve the sweating duct issue. Thanks again for taking your time to teach! As a side note, the auto CC on your videos (I know it's not in your control) is interesting..."ducks" for ducts, and "HBC" for HVAC, amongst others.

Hey Tim great video as always. Is there a resource/Calc to calculate the surface temperature of the duct depending on the SA, attic temp/RH, duct R valve?

I worked in estimating for a very very large hvac and piping contractor for 35 years . I retired in 2018 . I wanted to replace a very ancient and inefficient forced air unit. Reuse everything except a new plenum and a friend would wrap the ductwork. My brother and I pulled out the existing stuff and and left a super clean work area. I thought about diy but said nah it can’t be that expensive right? Two local hvac guys came out and priced the furnace at $6k and $8. For a few hours work I said thanks but no thanks. I called one of our service guys and they came out on a Sunday morning and I paid them $1500 for labor and miscellaneous metal .I bought the unit myself for $1000+/- . It’s clear that people are overcharging and blame inflation to justify their greed . Look everyone has to be successful especially in contracting . Our average markup on bids was 15% . Some of these markups were 2.5 to 3 cost and that’s what their sales people are being coached for . Private equity has taken over the industry and things are about to get much much worse.

Just had a 20 Seer Bosch heat pump with dual fuel propane furnace back up installed. House cools great - but seems to run 5-6 minutes then shuts off. Humidity is in the low 60% most of the time. We live in DE so roughly same climate as NC. BOVA36HDN1M20 Coil: BMAC3036BNTA Furnace: BGH96M060B3B Load calculation for the house via manual S: Cooling 23,700 Heating: 26,600 Current HP settings- accelerated cooling switch is off and set to 3 ton (switch is up) No idea about the air flow settings… Can I just switch the switches like you said or need to check the air flow? Also- installer just put in a Honeywell pro stat. Would the ecobee be beneficial in our case? Worth the $220 plus installer cost? Thank you!

Great video! I have questions is there a specific type of compressor that the start terminal and run terminal winding equals to the third terminal?

Great content Tim! Thanks for sharing your process!

Nice! Thanks for posting. We're almost at the point for some of these customers to wearing body cameras... Quote of the video... "...Nothing caught on fire..." lol

Great video. One question, why not ohm out directly at the compressor windings in case of a bad wire situation?

Let me ask a question! I had automatic trip on a breaker, windings measured fine and ol to ground as well. Turn breaker on it would trip. Did the same checks. Then I would unplug the harness and no trip. Performed that multiple times unplugged and plugged with same result each time. Thoughts on that? Thanks

Great and awesome troubleshooting video. Keep it up.

Id like to talk about the duct design itself and the size. I’m in Louisiana where we mainly have one box with 13 ducts coming off off it in residential and some commercial applications. It works but I know in theory it’s not right. I’d like to better understand how to make the most efficient air system.

Thanks for the video, great info. My wife and I just finished building our house this year and went with the Bosch 18 seer units. We have a 5 ton outdoor unit paired with a 4 ton indoor air handler and a 3 ton outdoor unit paired with a 3 ton air handler. I see you talk alot about setting the units up to properly dehumidify in the video, but you don’t mention anything about cost savings on the monthly electric bill. I assume the way you set up your unit would also be the best way for energy usage cost savings on the monthly electric bill? My units will typically run for about 20 minutes and then will shut off, and the airflow that comes out of the registers to cool my house is pretty strong. And mine only are set up for 1 stage of cooling. With these inverter units, I can’t help but think that if the units ran longer at a lower compressor speed and/or a lower fan speed, then I would see greater savings on my monthly electric bill, and would also achieve better dehumidification like you mention. So I’ve just been trying to figure out if my units are setup properly and if I’m getting the maximum energy savings I should be getting out of these units, but I’m not really sure how to determine that.

Great stuff again. Tim is there an actual calculation that allows you to calculate the outer temperature on a duct, based on the other parameters?

Great video, can u show ecobee setting for heat mod ?

I was thinking of doing something similar, but I was concerned about corrosion. The chart below says that stainless-steel & copper risk galvanic corrosion especially given how much moisture there is around HVAC units. engineersvault.blogspot.com/2007/02/galvanic-bi-metal-corrosion.html

lol I made this almost exactly a few months ago and integrated into HA 👍🏻 good walk through, I didn’t do the line temps but gonna add that asap!

Damn good tip.3 decades and now i come across this issue

I do commercial HVAC controls and my company does mechanical installations. I'm DIYing my next unit myself. I can get an inverter heatpump system for the price I'd pay someone to install the cheapest lowest SEER system. I've been through the Mitsubishi classes and got certified on them. For people with the know how I think DIY is a great option, but I agree for most homeowners it might be over their head. The units are getting more complicated as well and that's where having a contractor can be a good thing.

I do HVAC controls and this is exactly something I've wanted to do to my house unit without using some commercial controller.

Sir, your videos are awesome. Please guide , how to calculate the duct surface temperature ?

You are best!

got one call ac not working. softstart bust inside , oil was inside the plastick cover. removed soft start and rewire and ac start working. plz let me know if any one know why that happen. customer told me 4 days ago someone install it.

I love your content keep them coming

Tim, is there a reason you went with Bosch instead of Mitsubishi?

Great! Keep it up

I love these videos. You could extend each one an hour. So informative.

Was kinda left on a cliffhanger when you said attics next week 😂

As always nice video man

Dang i like this guy

Definitely great info

All the stuff a thermostat should be capable of. Why in 2024 can we geek peoples not open a thermostat app and be able to prediag a system or log statistical data?

Great video Tim.

Which model dehumidifier you can recommend to same application smaller attic?

Great video! Wish everyone put some much care and thought into an install.

Where can i get just the dumper for honeywell actuator?