Just 6 years and we got from a "Whole room water cooling" to a "Whole house water heating"

If Linus moves, he's going to have to leave a 400 page manual just to use the house.

Best part is missing: The plumbers face when the IT guys tell them their idea

I was a little concerned about the mixed reviews, but I used it last year and hooked it up again this year and it was great kzfaq.infoUgkx-izdrK3eF-HMvjzeBOxToD6Fx-4ulJUh . I couldn't get my 10' Intex pool above 76 degrees the year prior and last year I got it to 90 and had to put ice in it. This worked so well! I have just 1 mat hooked up to a 1,000 GPH Intex pump and it makes a significant reduction in the flow rate coming back into the pool, but that is to be expected with how far the water has to travel through the mat.

Jay's 2 cents: "I'm the king of water cooling" Linus: "hold my LTT store water bottle"

Linus is literally finding every way possible to write off things in his house and I'm living for it 😂😂😂

So there isn't a part 2 to this 6 months later? I wonder if that means it's going real well.

Imagine being the person coming in to buy this house in 20 years when Linus moves and having to wrap your head around all of this insanity.

Yvonne - ‘Linus, the pool isn’t warm enough!’ Linus - ‘Okay! Let me run some benchmarks real quick’

Energy companies hate this guy! One really difficult and complicated trick to make your hot things cool and cool things hot

Not sure if you plan to do this, but if you are already planning on cooling the solar panels, you might want to look at heating them during the winter as well with the server rack. This way when it snows, the heat from the cooling loop can melt the snow off the solar panels and continue to give some power.

Thx for the shout out my bro , technically having underfloor heating incased within a shotcrete pool shell may work , the geographic area , shotcrete mix , reactive soil composition and ground movement all plays a part in the decision process.

As an HVAC engineer and an energy engineer, this is one of the best videos I've seen in awhile. Great application of a heat exchanger. Large data centers use this tech for exchanging heat via a "water-side economizer" (i.e. running the evaporative cooling tower via the condensing water loop) when the chillers are off and the outside air temperature (usually controlled via a wet bulb temp enable setpoint) is favorable. Good stuff.

Being a contractor for Linus must be a surreal experience. I can see the morning meetings in front of my very own eyes "you know he's fucking crazy right, well, boss says he pays well so he gets to do whatever he wants"

Linus has transformed LTT into the perfect lifestyle company. "Honey, this house is way too big and expensive but I've got a great idea. LTT will pay to remodel our house! That's the upside. The downside...Jake and some of the other guys are squatting here for a while. OK, they might not leave". Finding legal ways to use company funds to buy stuff for your home and/or personal use is like a license to print money. Well done Linus, well done.

As an HVAC technician this video was very fun to watch! Seems like you guys had fun making your own two zone system ;).

Linus is just using the channel at this point to get the manpower to build his dream house and file it as a business expense while making the sponsors pay the labor-costs. That's the real galaxy brain move here xD

I love that Linus is just turning literally everything in his house into a business expense.

Great fun video. In Sweden and the rest of Europe there is a great deal of pressure to reuse server heat in multi MW data centers, EcoDataCenter use the heat for local town and making wood pellets!

This is a pretty brilliant idea. Every apartment complex with a pool should also have a colocation facility next door to keep the pool warm.

From doing unboxings in a dark NCIX office to heating a pool with the thermal power of several rack-mounted gaming PCs... Linus has come a long way.

Linus, I just want to thank you. I showed my wife this video and she thinks that my home improvement ideas are way less crazy now. You are a true hero and have saved my marriage.

As a former district heating/cooling engineer, this makes me smile, even if it's not "perfect". Cool project!

0:53 WELL DAMN I MEAN WHEN YOU PUT IT LIKE THAT

You know what’s kind of amazing about this series? Whenever in the future that this house has new owners, if they need to do any repairs or upgrades to its infrastructure or design, they’ll have an entire series of videos that meticulously lays out all the details they’ll need to know. It would also be kind of amazing to give the new owners a flash drive of all the videos, plans, layouts, and other info that the owners and any contractor would need to make changes.

Linus is only limited by Jake's knowledge these days, nothing else is holding him back from doing whatever the hell he wants with his house xD

From watching what this channel used to be to where Linus is now, good for you man, you are living your dream!

the uni where i did my bachelors in germany (can be quite cold in the winter) heated two big faculties just with the heat from their massive computing cluster, very good design

Linus really decided to use a nuclear cooling solution for his server rack.

As an engineer, the issue isn't coming up with ideas, it's about making them simple enough that maintenance isn't a pain. If something fails during Canada's cold winter... well, we're going to get a good video!

This doesn’t give the result expected. I’ve had a small pool (211 ft3) that uses a dedicated 3000 watt heater. During the night it was a able to maintain the temperature and sometimes increase it slightly. With this size of pool, the heat of those few servers will (which is probably far less than 3000 Watt) will not really help. I have also built a solar heater for this pool, that was much more effective.

love how youtube has me repeatedly watch this video, getting me excited that I'll get to see the final result. Nope, once again tricked into the watching the planning video.

Every time I see it, I have to say something about it: Your radiant heat contractor really did an incredible job on that panel. Don't wanna even think about what they charged, but the thing is gorgeous.

Never thought about building my whole house as a tax write off for a KZfaq channel. Well played sir, well played.

I did this on a pool 15 years ago for a geothermal heating system that maintained the Heating and Air Conditioning in a home in Texas.

As a pool boy and PC enthusiast, this is by far the most satisfying video you've ever made for me. The recycling of energy is enough to get me!

The heat exchangers also work with air conditioning, you can shut the fan on the condenser off and pump the hot refrigerant to the heat exchanger, heating the pool and making the air conditioning more efficient. You know, just in case you want to add more heating elements to your pool.

Im happy to see Jake and His Husband building their new home. It's wholesome 😊 Edit: Holy shit, MOM IM FAMOUS!!

This Linus renovating house arc is lasting longer than I expected

Already do this. I use my computers as a heat load for the AC to dehumidify the house during the summer. In the winter they provide a heat loop for the rest of the house. The system works great.

Remember to take account temp gradient of around 10C over fluids and please use a industrial grade pump and maybe double it with auto switching. Install pump after servers for minimum operation pressure for server cooling loop. I do heat recovery systems for work.

I am SUPER CURIOUS to know if Linus is able to just write off his house as a business expense at this point.

Reminds me of when I used to work at McLaren's Technology Centre, I believe that's how they dissipate their heat from the building, they have a man made lake next to the building which acts as a big watercooler essentially!

3:30 - 3:43 Genius. That "What!?" made me laugh way to much!

I love how a tech tips channel has turned into Home Improvements. I need more!!!

Normally i would install that as a snow melt system for drive ways and side walks but the the pool heat idea is fantastic use

I have a heat pump for my geyser. I just attached the evaporator to PC radiator and works like a charm. The evaporator sucks the heat from outside and the condenser dumps that heat into the geyser. Thus it's transfering the PC heat into the geyser

you will need an expansion tank. to keep it closed loop you can get a proper one that uses a rubber membrane and a hollow section of the tank to allow for the expansion of the water (or oil if you want to cut down on leak issues with the computer, evaporation, and corrosion), though a simple bucket will work (though it won't really be a closed loop at that point). also you will need an over-pressure valve for emergencies, though it is pretty handy for maintenance if you have to drain the system and/or fix things.

Every year for the past like 6 or 7 years you guys have done something absolutely crazy like this. Something unthinkable and ingenious. And I always think "there is no where to go from here" *...and then you go there...* So keep it up, guys. I hope you guys never stop making videos.

im glad someone like you is out there doing projects like this.

06:28 The moment you realize that first Jake, then the Gremlin and then YOU laugh maniacly. xD

Me: I will sleep early tonight so i'm not late for work Also me at 3am: Watching linus heat a freakin pool using heat from his servers

It’s becoming such an overengineered house…and I love it 😅 Linus, remember the 1st LTT house and the whole room water cooling: Don’t forget to put filters into your return pipes, as soon as they enter the house, and also before each servers cold water feed, to avoid clogging all cooling blocks again 😄

In todays episode of “Linus has an idea so grandiose and unique that he makes his contractors question their existence”

the timmy's cup at 5:57 truly candian lmao

I am so in love with this project.

This is incredible. I think maintenance is going to be the the biggest issue over the years - but man, the exchanging and sharing of heating and cooling here is pretty damn awesome.

For those curious, fluid heat exchangers are how nuclear reactors can make ridiculously hot water and steam without putting radiation into the steam used to spin the power generators. The radioactive coolant stays in tubes and they shove them into big boiler tanks to boil that water to steam. Source: been a nuclear systems mechanic for 6 years

Actually same idea was implemented in early 80s as upgrade of Swimming stadium Podolí in Prague (Czech Republic) which was built in 60s for recreation and mainly for olympic games. Nearby about 1 km away is location Kavčí hory where are located Czech television (Česká Televize - ČT) studios and HQ, whose equipment (server rooms, TV studios equipment) even today produces a lot of waste heat, which is cheaper to dispose into 3 large pools (outer 33 and 50 meters and inner one 50m long) and save same natural gas for heating those pools. Those pools have usually 25 - 27 °C , so it is actually great coolant for ČT studios

I work in R&D in the pool equipment industry and I watched this with my colleagues. Was a lot of fun. Can't blame the contractors for getting confused, lmao! Btw if you wanted to, you can always use glycol as a primary circuit media for the heat exchanger as it's inert and have great properties for temperature transfer.

I'm confident this will go as well as the whole room water cooling project from years back

This reminds me of what the Romans used to do. Either we've gone full circle or Linus is a time traveler.

This works almost exactly like a chiller system (with extra steps). Our server room has In Row Chillers and we have a chiller on the roof, the beauty of your system is its heating your pool while chilling your server room; but its basically the same exact concept. Also, I remember reading an article where Microsoft sunk a football field server farm in the ocean for cooling and also generating electricity; at first I thought that is where you were going with it.

As a building automation engineer this was refreshing to see with all the energy optimizations and things going on - a few things that came to mind is that u may have to get a pump with atleast 2 possible speeds, when both of the cooling circuits are open, you might want to run the pump at higher speed than with just one (this might not be neccesary but could be more efficient in dissapating heat from the servers) - also 1 handvalve for both of the circuits for balancing the flow between the two - also optional, but could prevent a situation where both electric valves are open but the water would still flow only through one of the loops (if the 1 loop has significantly more restriction than the other - if this happens it'll probably be the pool due to longer piping compared to the radiator) even if it isn't needed in the end, wont hurt to add them, just leave them completely open. Could also help in maintenance to be able to close them

Jake should be the Chief of Engineering for LTT at this rate. He always does amazing things.

Its crazy how long and how consistently LTT stays on another level

This is awesome! I do feel it's the kind of thing you'd want to check over at least once a year though lol!

I like how linus understands that were just going to skip the sponsors so he made it a perfect 20 seconds so i can just double tap and skip it perfectly without missing any content

I've always wanted to build a house with systems like this. I'm living vicariously through these videos

Wait until Yvonne wants a waterbed... Linus: [Excited] "Honey, I have a crazy idea. Just hear me out..." Yvonne: "You want to heat the waterbed using water on a loop from the server room?"

I was waiting for this video!!!!! Please make more content like this!!!

Great concept, but before doing all this you should do some overall calculations and see if the overall heat output of the room is even enough to make any difference in such a large pool. Love your videos and love how year after year you evolve into crazier and cooler ideas!

"We don't want to loose thermal energy to the environment around us" Linus going above and beyond for a suboptimal heatspreader, so yes they told you right

this has to be the biggest brain moment i have ever seen, why buy a hot tub when you can make one while cooling your rig at the same time

Alternative concept: Get a silo full of ceramic, and store heat from the machines in there, have that ceramic silo be part of the heating loop. Same principle as a storage heater. Since the storage heater is only being used to heat water in the heating system, you can triple down on insulating it so the heat stays in for longer.

In Sweden, the National Supercomputer Centre captures all the heat generated, approximately 1 MW, and transfers it away into the district heating system. This district heating system is a centralised heating system for the town, such as apartments.

I’m astonished Linus hasn’t scared away any contractors with these ludicrous projects

this is absolutely crazy AND I AM HERE FOR IT.

There are lots of hvac for homes that removes the heat from the home just like this but we go straight down not side to side for the plumbing like ya did in the pool. After a few feet the ground is a constant temperature all year around

Similar approach to Hotspot Energy's A/C to pool heat exchanger. We put one in this year and our house's AC dumps the heat into the pool water vs the outside air.

TLDR: Watch your cooling loop fluid levels carefully and take whatever action needed quickly. Good luck 👍 This is a fantastic idea, I do have concerns because I’ve been a part of pool building and plumbing since I was 5 years old. If in the future you have issues and you start to notice ‘coolant (or whatever fluid you are going to use in this loop)’ loss; cut your losses on whatever is under the pool and do the same concept on whatever the most accessible side of the pool / deck is. I say this because I’ve seen olympic size pools either sink into or lift out of the ground from leaks that put hydraulic forces under the pool, lifting it up (cracking the deck & expanding the rebar) or slowly hollowing out a void under the pool until it sinks bit by bit (sometimes taking the corner of a house with it on the slow journey) I love this idea though, mad props, hope it works for years to come!

This is cool, the principle of it kinda reminds me of the heating/cooling system in Norway's New National Museum, which opened last week and I was an HVAC engineer on. Combining several heating and cooling sources and controling them to achieve a given temperature set point in any given area is quite a job :D If this is going to work properly, Jake's got some work cut out for him to program this. I love the solution here :D Remember to fit a frequenzy regulated pump, so that you can have the system flow regulated, so not to need shunts to regulate the heat running in the system. It seems like your pool contractor is quite old school tho, because using flow heat exchangers is quite common in newer pools connected to heat pumps and server rooms. I was just recently involved in a project where they used server room heat to heat the warm water in an office building and ventilation heating in conjunction with a sea water heat pump to control the heating and cooling in the building. In the winter you can also run the heat from the server room through your roof panels to aid snow melting. Also, to make the system more efficient, a heat pump between the pool and server room, is a good idea. ;)

In Göttingen Germany GWDG company create 3,4 MWh electricity from Server room heating. Also heat the building and the garden.

Remember to always run higher pressure on the system/side that you absolutely dont want to get comtaminated. A good idea to use PWM or frequency converter on the pumps to save energy

It is a really cool project indeed Linus. But I've studied this kind of water cooling system for energy efficiency in school (I'm a renewable energy engineer), and my concern is that maybe the energy required to actually move around all that water and the control system (valves, etc.) is actually much more than the energy (heat) that is generated from your mechanical room and your solar panels (these ones don't generate that much heat, I've studied that, and you will lose a ton of heat in the transport of the water). And, to heat so much water like in your pool you need too much energy. So you will end up heating just 1 or 2 degrees in your pool :/ My advice is maybe first to calculate roughly how much heat you're going to generate from solar panels and mechanical room, and then compare it to how much you need to actually heat all that water in your pool. You'll see that you need so much more heat. And that can kind of heat can be achieved (sustainably) with solar heaters for pools. These systems are very reliable and cheap. I suggest you look into these pool solar heaters systems, and maybe implement a heat exchanger there (at the inlet of the solar pool heater). It would be cheaper and surely it would maintain your pool warm :D Sorry for my bad English haha. Greetings from México! If somebody sees this, pls like it so that Linus sees my thought :)

Considering the size of the pool and the thermal mass it represents, I would just run the computers' heat through the pool 24/7. You will barely even scratch a degrees of difference in the pool water.

I love how the most replayed parts of an LTT video are right after the sponsor. WE ALL SKIPPING THAT LOL!

In essence, a geothermal heat pump system. But extracting the waste heat from your electronics which you want cool and moving it to the cold pool that you want to heat. I don't know if the pool will get appreciably warmer, but the mass is there to cool the racks if you do it right.

This gives me whole room watercooling vibes and I for one am glad it's coming back!

I'm feeling like eventually since the server room is at the bottom of the loop it will inevitably catastrophically fail in the most Linus way possible and flood the rack.

Heat pump hot water heater in that room would do pretty well. It's basically just an air conditioner for the equipment while heating your water with the server waste heat.

As a mechanical contractor I would have loved to get my hands on a project like this, nice job thinking outside the box.

8:28 - That's a nice Renault shirt

5:20 Jake rethinking his life choices that led him to this moment. He'll have a hell of a resume though

Linus is playing Oxygen Not Included IRL here, love it

I saw somebody do this with a render farm. Water-cooling header for the computing hardware dumped heat into a swimming pool. Efficient re-use of waste heat.

As a automation engineering student this project makes me so excited and I'm curious to see how well you're capable to implement your idea in the whole sistem

Brilliant way of being able to write off the remodeling of your home as a business expense.

Hilarious I can hear the airshow in the show while its happening over my head at this moment. lol

I'd pump the hot air through pipes at the bottom of the pool and return it to the servers. Takes less energy and is extremely simple. With proper piping, you won't even need heat exchangers. You can combine it with fresh air intake. Doesn't need expensive and complicated parts. During winter, fan/air pump speed can be lowered to keep more energy in-house.