Save THOUSANDS Replacing Your Gas Furnace Yourself. 

Thank you so much Dave for posting this video. So glad to see an HVAC tech like yourself that isn’t anti-DIY. I was never good at sheet metal work until I started watching your videos. Thank you again.

Installed my own furnace, and found it to be surprisingly easy. The exhaust vent to the chimney was the hardest part. You can do it!!

Hi Dave! 2 years ago installed my furnace. I did even a graph with natural gas pressure value to CO level in exhaust - to setup a proper gas pressure - my optimal pressure was 3.38 (instead of 3.5 recommended). This year I guess surplus Lennox SL18XP1 5 ton 15.5 seer AC to replace my old 20 yo 10 seer Goodman. I like your trick to retrieve R22 inside the unit.

Let me just tell you as a far way friend you are the man and keep going.all the good honest people will support you regardless the haters that they will be affected by your videos because they can't scam and rip many people.

You rock, Cleaned and replaced almost everything on 22 yr old furnace and upgraded the duct work and it works better than it did when it was new. Thanks for the info and the confidence inspired!

I moved furnace from crawl to closet and from 80% to 92%. 50% of duct work, line set, condenser and all. All for around $3,500. Appreciate your videos.

I did install for 2 years great video remembering the job the bad thing was those tightly crawl spaces hated it those installs

wanted to say I and appreciate you and people like you because you have save me a lot of money. Thanks.

What a great tutorial video. Keep up the great work. Very thorough. Good clean install. I look forward to watching each of your videos.

Window spline tool to brake the sheet metal nice. Heads up that sheet metal is sharp be extra careful when working with it.

Another great video! I had a hvac system installed by Logan a/c & heating in Columbus, Ohio they didn't do anything what you have done. They did terrible work! They didn't seal nothing! All seams leaked air... etc.....

Great video! I have lots of respect for anyone who can do this. Even though I'd like to try it, I don't have enough confidence in doing the job correctly.

Awesome review, thanks Dave! At the end it looks like you checked the manifold, and flow pressures with a manometer. A short tutorial on that portion of an install would be really helpful. You did show the charts, but a lot of people probably wouldn't know how to use it properly. Thanks again for all the great tutorials! Happy New Year!

I really appreciate you being opened to showing your knowledge on install thank you brother don’t worry about what none of these selfish men say

Awesome info for DIYer with a will to study the details. Thanks for covering this arena of harder to find specific. Like your style of Sharing Info. ...and Teaching. Thanks 🙂

Thanks so much for taking the time to share your step by step install with us DIY guys , sooo much appreciated , so few professionals would do that. I have seen your a/c install videos but question if I should do that because of all the tooling i would need to buy along with the talent to use correctly. Offering assistance is over the top kind and so helpful !

Nice install. It reminds me of my residential HVAC days. I'm strictly commercial HVAC now. Glad to see someone showing the proper way to install the equipment. Like how you made the duct fitting vs just throwing in a flex connector.

Dave, great video and your workmanship is absolutely A1!!! Keep up the great work!! Wish you were in my area!!

I'm a DIY person and I hate paying for work. Just keep in mind most places won't sell you HVAC equipment. Goodman is about the only brand that you can buy online but here is their warranty policy: "No warranty coverage is offered on Goodman brand equipment purchased by consumers over the Internet, including web-based auctions, telephone or other electronic means, unless the unit is installed by a dealer adhering to all applicable federal, state, and local codes, policies, and licensing requirements".

You are one of the best instructors, thank you very much for your teaching video.

thank you good sir.!! not in the market to replace one but very good education.

I've learned alot on this channel as a home owner and someone who has been working in the maintenance field for 15 years. Just do your disclaimer in all your video discriptions and let people decide if this is for them or if they want to hire a professional.

I've learned a lot from you about aspects of this work. But I have another concern about the over-tightening of steel pipe and fittings. This pipe is threaded on a taper. Over-tightening steel pipe into brass fittings could split the fitting. Thank you, sir, for sharing your knowledge. Regards.

Amazing professional working. Thank you

Awesome video! Looking forward to the next one.

I didn't see any blue sealant on one of the sides of the gas elbow in the furnace. I will be using this video to help with my own install in my house. Thank you!

Merry Christmas dave, HI! how are you doing. I whach you clip all the time, your do awesome show and explains very well and clearly, I love what you do. You are do great works 💪

Excellent video, thank you for sharing keep the good work!

Thanks for sharing your tips and knowledge on DIY install. I will look for a professional to do brazing and pressure testing and to sign off on the install for warranty reasons. My question is on sizing. I have a 20 year old home that has the original 3 ton AC / 100000 btu gas furnace in Minnesota. The system runs almost continuously on the coldest and hottest days but has always been able to maintain set temps. Most charts on sizing say I should have a 4 ton system. Should I upgrade the size of my system? Also, do you recommend a 1 or 2 speed system? I’m seeing lots comments here by professionals talking about the expensive tools and involved techniques for tuning. I worked with the professional on the install on my last home and the only specialized tools he used were the pressure gauges for checking pressures and the torch for brazing lines. That system has been running flawlessly for 10 years.

Thanks! I'll use this video to create a check list for the person who will replace my old furnace. Never know, they might forget a step or two 😂.

Great DIY video Dave. Yeah. I for one will have a professional change my furnace out.

Excellent presentation. Very helpful demo. I would hire you based on this. And I might even undertake the project, given that I have a reasonable hands-on background and most tools already. Keep up the great work. 👍

Excellent ! Awesome workmanship!

Nice job, you were clear on the safety points and explained what you were doing and why.. Well done

Really Happy to learn from you man thank you!

At 7:00 and doing everything perfect, including what I always do is test the non-contact tester against a live wire to make sure it works instead of assuming it works. 53:59 if your supply plenum, return plenum and cabinet doesn't have a hole for a manometer, nobody has ever checked static pressure.

I put attention in all of your process and when you disconnect the Y1 you said w1. Hope not affect people to reconnect their wires. Good video

Great video that shows so many steps and details! I found you through a podcast. I’ve had nothing but trouble with our Goodman units. They are only 4 years old. If I had the money I’d rip em out and replace them.

Great video with really thorough detail!!

Love ALL your videos Dave! Only problem is that I can't find a supply house who will sell to someone w/o a pro HVAC contractor account that's not established!

Great video! thank you for the efforts

Used Goodman and they are work horse that required very little maintenance. Very reasonable priced filters too. Carrier on the other hand....

Very informative, thank you for the video. Question should the water heater also have a drip pipe?

This guy is a great teacher

Nice install

Nice! I just bought a magicycle ocelot with similar specs for $1000 so i think that one is a great deal.

Thanks Dave another good one.

Thank you very much this video was very informative and helpful for me

Man that's a nice install! I get it....your a journeymen so it should like a pro install. I hope mine don't look too ghetto!

I said thank you very much and appreciate it✨ please keep up the good work ✨I hope you make more video n I learn a lot from your video ✨

Thanks for this video!! I just got a estimate for $18,000! I don't have that kind of money. So I'm going to do it myself. Very helpful video! Subbed!

Awesome job and awesome vid! Thank you fir this series sir! I appreciate the information sooo much! Can't wait to watch the other two vids in series. More and more, you instill confidence me bud! Keep them coming. BTW....my compliments to your camera man...er woman. Yall are a great team!

Thanks so much I really like you video. Thumps up all the way.

Great video, and great job!

Very good video thank you very much for sharing as Wife and I if we win the place are getting a larger house for the growing family and the place has a 20+ year old furnace that I am sure needs to be replaced with a much more efficient model ... this will save us some big bucks as I am comfortable doing this sort of thing myself after reading up and learning the gotcha's ...

To install AC and Furnace your self it's a dangerous job without school or without lisence because theses jobs supplies with gas and electricity, however everybody want to save money when Doing Right life is good but remember SAFETY FiRST. thanks for DiY video 😊

instead of a flat piece of piece of sheet metal to reduce the filter rack opening, possibly the flat piece with a ~1 inch flange bent up 90 degrees for screw attachment to cold air return? Good demonstration.

Thanks once again bro if a have to watch your videos a million time I will see then Thanks to these videos I become an expert you are the best

You guided the coil box over the front edge of silicone with your left hand quality workmanship good seal.

My furnace is from 1980s. Replaced blower about 10 yrs ago and a thermistor a few years ago. It's on borrowed time. I want to replace myself but part I'm not sure about is the sheet metal work

Thank you for this video, my furnace is 22 years old. It works fine, but the air duct input is made not on the side, but at the back of it, and as a result, the air filter must be removed in the summer otherwise the air conditioner coil will be frozen and the filter itself in the winter is always clogged at the bottom, so I have to rotate it by 180 degrees after 3 month or so in the winter. Eventually, I want to get the same mid-efficiency furnace and connect it to the same liner I have installed. What was the reason you removed that old furnace - did it fail? Are these mid-efficient furnaces still available nowadays? Where can I get one? Also, can you comment on what you measured with that HT-1890 manometer and what you adjusted?

You sir, are the hero we need but don’t deserve. Love your content for us DIY’ers. Also, love all the HVAC guys hating on you 😂. Now they can’t price gouge everyone. Power to the people!

It would be nice to see a Goodman gas furnace review by one of your customers!

No flex line to furnace or water heaters in Michigan must be black hard pipe … I also have my HVAC guys mastic inside seams so no air leaks also tape outside seams on return, coil and takeoffs

This is a very useful video.

The old unit you took out did not look bad. The A coil looked pretty good yet What was wrong with it that it needed replacement? Good clear explanations of what was being done and why

Great video!

This was excellent

Hey man great install only thing I would do differently is put a trap on the gas line but otherwise great job bro

Thanks for continuing to post these DIY videos! Keep them coming!

Can you please explain more on the static pressure test . Why and how

Very nice work

I’ve seen firsthand what home ownership can do with items DIY projects as for furnace installation!! And what I seen was an installation that would Kill the whole family in the first hour of operation

Don't know bout those lever locks. Hard to teach a hard headed old dog a new trick. But to support you, I may buy a small box just so I can say I tried them!

I researched gas furnaces for DIY installation in early 1990's. I purchased one of the Goodman line of gas furnaces for lower cost initial purchase and future parts availability and lower cost parts. I note your choice of Goodman these days. DIY these days = financial self defense from the unscrupulous when an honest trades person/contractor is not to be found.

Channels like this are an invaluable resource for homeowners! Haters gonna hate. I see lots of HVAC guys checking a channel geared specifically to homeowners and being backseat drivers thinking they're rocket scientists. The fact of the matter is repairing and replacing HVAC systems if leaving it ALL to the "professionals" like SO MANY things has become cost prohibitive for a lot of people. Videos like this share info and can also lead people to NOT taking on such a job for themselves. It's a great research resource while determining if you (as an individual) have the mechanical ability and common sense to even consider doing it yourself. The Monday morning quarterbacks want to act as though safety is the ONLY concern which, it NEVER is! You can't change stupid and there would always be people biting off more than they can chew regardless of videos like this being there showing how simple a large part of a job like this is. $10-15k for a new system installed by "professionals"?! I can see people NOT replacing a system due to cost and dying of carbon monoxide poising. I think all homeowners should know more about maintenance, repair and replacement of essential home systems than most do. It's our right and responsibility! That's a great tip about pulling a permit and having it inspected as well! Haters gonna hate and who the F🖕CK cares?! Great video and channel! Thanks bro

Informative , I appreciate

Thank you for your videos. I decided to replace my evaporator myself instead of paying a tech $5,000.

I'm glad I found your channel. Good instruction. Is it worth getting a 96% efficiency rather than a 90% or so furnace?

goodman unit I bought had bad flame sensor. I replaced cheapest part two $5 no call backs slc

Where do you buy the new furnace and what's the most reliable furnace (consumer report) for year 2023? Thanks!

Came for the hate comments. Don't disappoint! Nothing less than a full on linguistic thrashing will do, now get on it! 😃 God forbid somebody learns how to save themselves some money with these solid videos.

Good job David

I LOVE running a compressor to its death, little does it know this was (its) Last time running... my perfectionism side drove me to fix "it's"

The guy I worked for always used the gas-rated yellow Teflon tape for gas pipes. We saw one case where a new gas valve failed because the excess pipe dope squeezed out inside the pipes fouled the screen on the intake side. That's not criticism of you necessarily, I'm just telling what I've seen. Good job adding the bushing. I'm going to assume the pre-made BX cable has the required red hat inside. That only leaves the ground in the handy box that holds the switch. All junction boxes and other metal enclosures must be mechanically bonded to ground with a green grounding screw. The painted surface of the furnace and even conduit and BX are not robust enough to ensure good grounding. I thought of a way to look at it that may help you see. Periodically in the past, people have been electrocuted and the investigation found the fault to be unprotected wires that have worn through because of sharp edges and vibrations or whatever. It may take decades for the damage to happen but happen it does and the consequences can be very grave indeed. So the code errors on the side of caution and requires bushings everywhere every time no matter how improbable the chance. Bonded grounds too. If a wire comes loose and touches a metal enclosure that is properly bonded to ground then the breaker trips because if it doesn't the enclosure will be hot. Possibly this will go undetected until one day when someone servicing the unit for some completely unrelated issue goes to turn it off. I suggest you add green grounding screws to your kit along with the screws that have the short pigtail attached to make jumping through the hole easier. And the red hats for when you encounter old BX then need 'em. And a supply of the new style handy boxes with the raised and threaded hole for the ground screw to just swap out those old ones that do not have the hole nor threads and certainly not space at the back for the ground screw to poke through. It's just quicker to use a new style handy box than making the old ones work.

Thanks!

Thinking of doing this myself since my furnace is 20 years old. Ebay sells them. Just choosing the right time of year before it fails when you NEED IT. 😬 Already did my gas water heater a few years ago.

Hi Dave, can you cover heat pump technologies in water heaters and furnaces in some episode? I'm a residential designer and this area looks exciting from a layman's perspective. I'm trying to make sense of the prevailing winds in this area. I love your channel!

Do you have a video / plan to have one on installing an air handler in the attic? I feel this is the most difficult part of an air conditioning replacement. - I appreciate your AC install video though!

Dave: around the @10:50 mark you misspeak on the terminal designations and color codes. I’m sure it was just an error from being distracted by the camera, but at the very least you should put a correction on the screen during that part. W1 is not a call for cool. Y1 is a call for first stage cool. W1 is a call for first stage heat. And G from your thermostat to your furnace will bring on the furnace blower during a cool call. G call on heat isn’t necessary on a furnace because the furnace board controls the blower relay as part of the order of operations for safety reasons.

Every time I get another house or move, the 1st thing I do is change the switch to an outlet and put a plug in on the furnace. I know you're not supposed to but when you live in areas that can get -50c why would you risk having no heat in a power outage. This way I can run my generator and power up the furnace in an emergency. Seems like this should be a standard installation in very cold climates.

I did not know that you can store all the freon in the condensing unit. Mind blown!😵

Great content. This install was very straight forward. It’s nice to not do a lot of duct modifications on installs.

I have two questions Dave! Sweet video btw! 1. Is it extremely difficult to move the furnace up into the attic instead of having it in the basement? My guess is ductwork will be a pain.... and 2. is this process similar with an electric furnace replacement? I don't have gas in the house

I bought an old house has a basement furnace. I haven't used it yet because the summer, but A thermostat on a home furnace; is that supposed to go to 5,000 degrees, you think? This one does

Hi Dave, I like all your videos. I'm struggling with my furnace. Do you have any idea why the heater doesn't stop even when I turn off the thermostat? It keeps working until it melts the furnace wires. I've already changed the high limit switch and the control board also the thermostat,i hope you respond me. Thanks

Safety glasses and adjustable wrench works better other way round.

How do you dispose of the FREEON after you capture it in the condenser? Great video man.

Thank you

Beautiful. A question on the liquid line set. My run length is a bit over 17 feet give or take a foot, how much is acceptable over that to connect? 20ft new lineset be ok? I can probably move the new condenser a foot or two away. And I saw a formula for adding more refrigerant somewhere.... The unit is charged for a 15 ft lineset BTW