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Just purchased, thanks!

can the 519 use outdoor temp to change the pwm timing?

Good stuff!

How do you buy that screwdriver?

Quick question. I watched a RUclips video that says a quick fast rule on residential HVAC that 1cfm per square foot of home. Is that correct?

On a 2.5 Ton unit top fed is one return from the bottom of the unit adequate? The airhandler is about 20 inches elevated so that it can be vented through its bottom. Thanks

Does Bosch make a 9000BTU with 115v like this? I only see 1 ton units out there.

Is the 0.5 restriction a 50% restriction, 0.5% restriction or some other value? Or put another way, is the difference between a .16 restriction and a .63 restriction significant? Would a 1.0 be a total restriction? Would we be better not filtering our AC at all and filtering with other room devices? Thanks for the video.

Why they don’t have 4 ton condenser? Only 5 ton BoVB condenser

Have you tried installed a NS-18 with the Napoleon air handler? Curious how that AH is?

🌮pump?

Thanks for the information im a hvac contractor in Houston tx

I have all my current duck work information with drawings and I am looking for someone to design a new system. I’ve been told before the duck work system is undersized. I would love for you to design mine… any thoughts, ideas would be greatly appreciated.

White Steven Taylor Larry Harris Betty

Ive always used stainless steel washable, mesh and carbon filters, fact is air filters protect your equipment, there not for air purification, you can install a UV light in the return or the air handler, it works in hospitals, it should work for you. I can say for a fact, the last 2 units ive had, after 20 yrs of daily use, the coils were still in great shape, and ive never had to have my duct work cleaned, and still clean, but i clean my filters once a month. If your a germaphobe and you think high merv filters are helping you, be my guest, your paying more money for filters continually, and you will pay for expensive repairs you caused

Issues that I've found and a few solutions. 1. Size naturally makes it vulnerable to clogged sponge filter, which causes a slurping sound. Cleaning and regular maintenance helps prevent this. Don't clean your indoor coils while letting it drain into pump, also have found pan tablets clogs spnge filter. Keep extra filters on you. 2. Lack of required maintenance ( which could be way more often than people realize) can lead to a dirty water (float) sensor and unit will keep running. Everytime this has happened cleaning it has only fixed it once. The other times it just kept pumping regardless of cleaning. 3. Anti-Siphon valve ( lil green thing on yellow tube) is not made for length we think it can accommodate (Also it drips water a little but it doesnt seem to be an issue). This leads to slurping and sucking after pump has stopped. At first i thought it was a dirty filter, then dirty water sensor continuing pump after empty. Then realized there was a siphoning effect pulling water thru pump after it disengaged. I later found out, thru refco's competent tech support, that the pump tubing was ran too far vertically after too long horizontally. Basically cut downflow part of tube as short as possible to reduce siphoning effect. It worked. Would like to add, competent is a a huge compliment when i think of tech support. 4. Obviously make sure drain line doesn't sit flat against bottom, either cut at slant or notch it. All in all this lil pump opens up options as it has a very powerful pump for its size and it looks good. But always gravity drain if possible Hope this helps

Great explanation for static pressures 💯👍

thanks for the video...

Are the valves free? Or you have to buy separately

Thank you!

Great video. I have a Goodman 4ton modulating 120,000 btu furnace. I have 3 cfm output on panel that range from 1670-2200 cfm. My furnace is located in basement, I have a 16’ trunk on left side of house and a 36’ trunk going to the right side of the house. When I start to build off the plenum does the first run on both side have to equal and be around that range of cfm or does the longest run has to start off being that cfm range?

Nice illustration

Yes but it will not catch anything this proved nothing

But what merv is it

Spun glass are awful look the same coming out as going in.

is it still quieter if the condenser is above the split duct?

Nice thorough detailed video. Can you use Blue tooth to activate recirculation pump? say you take random time showers.

More static pressure, less CFMs. Love it.

does it get power by out door? unit

can i use ty branches with my Duct ?

I will be needing to replace a surviving 40 year old R22 system because my HVAC guy says he is not allowed to work on banned equipment anymore. His sales team wants me to hurry up and buy an R410a system before 1/1/25 because the prices on the R454b systems will be at least 25% higher. I am disturbed that he wants me to buy another banned system that he won’t be able to work on. From my research on what to buy I came across some disturbing information. I am pretty sure DuPont is not aware of it yet, but their R454b refrigerant is already on the radar scope in Europe for the forever chemical toxins known as PFAS that it contains. I do have complete confidence they will have a replacement coming before the R454b patent runs out though. It was also interesting to fine that R32 is outside the scope of the new environmental ban in Europe. Just search up R454b and PFAS. This a far too familiar scenario. Maybe some of the equipment manufacturers that really like this new and untried toxic R454b could have made better decisions. It would sure keep me from bearing the burden to make all the good decisions on which equipment to buy.

This is an amazing explanation. Really helpful. Thank you so much

I need to run about 27ft of 3/8 & 3/4 inch from second floor to first through the ceiling . The 3/8 is easy to run and even found a bending spring for that size to make life easier. But have not found a bending spring for the 3/4. Someone suggested I fill it with water or sand and close the ends to run it. Im not sure if that would be ok. I can flush it and dont need to install the actual units till a year after this rough in. Can you give me some suggestions? Thanks

Excellent explanation! I will need to rewatch several times though for it to sink in. But seriously thank you! Because as others have said, this is the best out there to do with static pressure.

Can you do a multi zone?

It would be useful to test a 4 inch deep merv 8

They are super quiet, except in my case I have some squeaking and squawking going on from an apparent vacuum issue. Line goes up into ceiling with a 10 ft horizontal run before it drains. Would like to see a comparison between this and the Combi unit they have. What I see happening if the power goes out, that line continues to drain and overflow that little tray. Mine continues to drip for like an hour before it stops. Just wondering if that’s an issue with the way the Combi is installed instead. Look forward to your response.

I don’t suppose you guys offer a duct design service cheap? Mine is simple. Ranch, crawl, center furnace, left right 5 take offs each side. 1500 sqft 3 ton. I’m looking for round main trunk lines. Easier for me. I’ve learned a bunch, but I’m not looking to find out I screw up something simple. I don’t even need a cad drawing. Plenum size Starter from plenum size Then how often to reduce. Currently have a rusted out system, and I don’t trust it was done right when first done. 5 take offs all on one side no reductions. Long story.

I was most concerned about the coil drop since cleaning the A coil is a huge job. And I would like to share what I have done to measure the coil drop, which is very easy to do. You do not need to drill anything and you do not need to buy the special probe either. Just use the screw hole by taking out a screw. To measure underside of the A coil, I unscrewed one of the easily accessible screws from the triangular A coil cover blocking the underside. To measure the top side of A coil, I unscrewed one of the A coil housing cover screws and measured there. In both cases, I pressed the open end of tubing from the manometer ($35 from Amazon) right against the screw hole tight and read the meter. In my case, I measured 0.16 (top side) and 0.25 (underside) which gives me drop of 0.09 WC. I was afraid my A coil would be clogged up a lot after 26 years of use without cleaning at all but this measurement tells me it is wide open for which I am so happy not having to do the big job of disassembling the whole A coil and cleaning it up and reassembling it. Just for sanity check, I also bought Anemometer ($16) from Amazon and it measured anywhere from 550-800 ft/m air speed out of all the vents which seem very reasonable based on what others measured on brand new system. This sort of confirms that my A coil is pretty clean even after 26 years of use without cleaning at all, which is quite surprising. I did not even replace the filter either. I simply vacuumed the filter every year. I hope I am not dreaming.

What is a good furnace and ac combo? I’ve had a few companies come out and tell me different things. One doesn’t like napoleon the other likes only Armstrong products? They all dislike Bosc? What would you recommend?

Be careful we used a cheap merv 1 and it clogged our system inside the unit with hair, dust, dirt etc. Costs us 170 to get it cleaned we also have pets so get a thicker filter then merv 1 if you have pets etc

My mind is blown. I had no idea and I really thought i was doing the best thing getting the more expensive filters. Im going to upgrade (to the cheaper filters lol) this weekend and I will report back! Thanks for making this educational video for us uninformed homeowners!

I normally get the filtrate 1900 thinking is supposed to help with allergies at home. I recently saw a video where it mentioned the stress it can put on the system and possibly ruin it later on. I’ve been using the filtrate 1900 for 5 years now and so far no problems. I heard about filters that hospitals use and can help with the air flow. My unit is a 2ton. What type of filter would you recommend for my system that wouldn’t put much stress on it? Like what would you recommend the best MERV would be for my system?

Great video. Thanks for the insight

So how does it know when the temp outside gets below whatever setting you choose to kick on the furnace?

Have you ever taken the cover off one of these once it’s mounted? I can’t get that thing off.

Question I've asked on similar videos that hasn't been answered. I previously lived in the NE and had systems with just one filter at the furnace. Now live in the SE with a home on a slab. I have five separate filters in the ceiling in a 2200 SF home. Only the two in the most lived in areas really ever get the least bit dirty. Am I okay using higher rated filters to get things like the pollen we have here out of the air and to keep the return ducts cleaner.

Yep, best explanation out there. You got a like and a subscriber. Great content!

Man, you should start a department in your business where you consult homeowners. I'm no HVAC pro, but I know my system isn't configured right because the has has an 800 sq ft addition and they didn't add new returns or change the AC unit. Every time I get a contractor out they just say, "That oughta be fine." I keep expecting someone to do measurements and calculate airflow, but not a one has yet. I know it's not right, but don't know enough to guide the conversation on the phone and weed out the guys that won't know any better.

Can you make a comparison video yellow jacket vs Navac and CPS Black Max ??