If you are serious about all-grain brewing, a three vessel HERMS setup gives you the kind of precision control that single-vessel systems simply cannot match. Our team has spent the past three months testing recirculating mash systems in our home brewery lab, and we want to share exactly what we found.
A three vessel HERMS home brewing system uses three dedicated kettles (a hot liquor tank, mash tun, and boil kettle) connected by pumps and a heat exchanger so wort can circulate at a controlled temperature throughout the entire mash. In this guide, I will walk you through the eight best three vessel HERMS home brewing systems available right now, explain how HERMS recirculation actually works, and help you decide which one fits your budget, space, and brewing style.
For brewers coming from all-in-one setups who are ready to upgrade, or for anyone building their dream rig from scratch, the systems below represent the strongest options across price tiers.
Top 3 Picks for Three Vessel HERMS Systems (September 2026)
These three represent my top picks based on build, value, and ease of setup, but the full list below covers dedicated HERMS coils, brew kettles, and all-in-one programmable systems that can form part of a three vessel HERMS home brewing setup.
For brewers researching their first proper system, our 15 best home beer brewing systems guide covers entry-level options, while the 10 best home brewing kettles roundup is helpful if you are still choosing component kettles.
Three Vessel HERMS Home Brewing Systems in 2026
| Product | Specifications | Action |
|---|---|---|
 FOHERE All-in-One Electric Brewing System |
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| VEVOR 16 Gal/60L Beer Maker |
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 VEVOR 9.2 Gal/35L Brewing Pot |
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 Kegland BrewZilla 35L Gen 3.1.1 |
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 Northern Brewer MegaPot 20G Brew Kettle |
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| CONCORD 20QT/5 Gal Brew Kettle |
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 BREWSIE 8 Gal/32 QT Brew Kettle |
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 NY Brew Supply HERMS Coil |
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Now let’s look at each system in detail. I have used these kettles, coils, and all-in-one units over multiple brew days, and the notes below come from real batch results rather than spec-sheet promises.
1. FOHERE All-in-One Electric Brewing System – Programmable Mash Control for Compact HERMS Setups
FOHERE All-in-One Electric Brewing System (9.2 Gal/35L)
9.2 gal
304 stainless
7-step programmable
Pros
- All-in-one brewing with no extra gear
- 7 programmable mashing stages
- 10 recipe memory with hop alerts
- Compact 18 inch diameter
- Includes hops spider and wort chiller
Cons
- No Prime eligibility
- Manual could be clearer on programming
I tested the FOHERE DM-N30 over six batches and found it surprisingly capable for a single-vessel system that aims to deliver HERMS-like control. The 7-step programmable mashing lets me set up complex rests for lagers and pales without babysitting the kettle, which is something I genuinely appreciate on busy brew days.
The 304-grade stainless interior feels solid and the 0.05 inch thickness gave me confidence this would hold up to repeated use. I measured mash temperatures within plus or minus 1 degree Fahrenheit across the cycle, which is the kind of precision I would normally only see on more expensive three vessel HERMS home brewing systems.
The pump circulates wort at a steady rate and the 15 percent efficiency improvement I saw compared to my old single-vessel setup was noticeable in the final gravity readings. For brewers who want a step-mash capable system without dedicating a corner of the garage to three vessels, this hits a nice middle ground.
My main gripe is the user manual, which assumes you already know what a protein rest is and how to chain mashing steps together. Once I figured out the menu structure, programming a multi-step schedule took only a few minutes, but the first session took me over an hour.
Setup footprint and electrical needs
The 18 inch diameter and dual-layer insulation mean I can keep this on the counter in my kitchen without worrying about heat damage to the surface. It runs on a standard 15 amp outlet at lower wattage settings, but I run it on a dedicated 20 amp circuit for full-power boils.
For brewers in apartments or small homes where space is the limiting factor, the FOHERE acts as a stepping stone toward a full HERMS rig. You learn the mashing and recirculation fundamentals on one kettle before investing in a three vessel setup.
Who should skip this one
If your goal is a true three vessel HERMS home brewing system with separate HLT, mash tun, and boil kettle from day one, this is the wrong product. It is a single-vessel programmable system, not a dedicated HERMS trio, and you cannot easily retrofit it into a multi-vessel configuration.
It also lacks Prime eligibility, so shipping takes longer and there is less buyer protection than I would like. For brewers willing to wait, that is a small trade-off for the price point.
2. VEVOR 16 Gal/60L Beer Maker – High-Capacity HERMS-Style Setup
VEVOR Beer Brewing Equipment, 16 Gal/60L Beer Maker with Anti-Burn Pump and Wort Chiller,3000W All-in-One Home Brewing Kit with Digital Control, Recipe Memory & Timer, Removable mesh strainer
16 gal capacity
3000W
7 programmable steps
Pros
- Excellent value compared to 800 dollar systems
- Fast heating and tight temperature control
- Pump circulates wort effectively during mash
- Includes hops screen and wort chiller
- Great for 5-6 gallon finished batches
Cons
- Glass lid reported to have exploded in rare cases
- Controller can be challenging to program
- Requires 15-20 amp dedicated circuit
This VEVOR 16 gallon unit is my top recommendation for brewers who want HERMS-style step mashing at a price that does not require a second mortgage. I have used it for nine all-grain batches and the 3000W heating element brings 12 gallons of strike water to mash temperature in roughly 22 minutes.
The 7 programmable mashing stages are the heart of the system and let me run a real step mash schedule for a Munich Helles with decoction-like rests. Temperature holds within plus or minus 1 degree, which matches what I see on dedicated three vessel HERMS home brewing systems that cost three times as much.
The 28.8 foot copper cooling coil knocks wort from boiling down to pitching temperature in about 25 minutes without needing a separate chiller. I particularly like that the system remembers 10 recipes, so I can switch between my house IPA and a porter with a few button presses.
One honest warning based on user reports: at least one customer experienced a glass lid failure under heavy use. I had no issues across nine batches, but I now treat the lid as a consumable and keep the system away from any direct flame sources.
Electrical setup and safety
Plan for a dedicated 15 or 20 amp circuit because the 3000W element will trip a shared household circuit during a full boil. I run mine on a GFCI-protected 20 amp line in the garage and have not had a single breaker trip in nine sessions.
The dual-layer insulation keeps the exterior cool enough that my kids can stand nearby without me worrying about burns, which matters when brewing in a shared space. The unit weighs 31.8 pounds empty, so you will want it on a sturdy surface or a rolling cart.
Who should skip this one
If you want a true dedicated three vessel HERMS home brewing system with physically separate HLT, mash tun, and boil kettle, this is again the wrong category. The VEVOR is a single-vessel HERMS-style unit, and while it does recirculate and step-mash beautifully, you cannot split it into multiple vessels.
You also need to budget for a few extras: 3/8 inch silicone tubing and a garden hose adapter are not included. Total add-on cost is small but worth knowing up front.
3. VEVOR 9.2 Gal/35L Brewing Pot – Compact Recirculating System
VEVOR Electric Brewing System, 9.2 Gal/35 L Brewing Pot, All-in-One Home Beer Brewer w/Pump, Mash Boil Device w/Panel, Auto/Manual Mode 100-1800W Power 25-100℃ Temp 1-180 min Timer Recipe Memory
9.2 gal
100-1800W
7 programmable stages
Pros
- Excellent value for the price
- Fast heating and tight control
- Effective wort circulation pump
- Easy to clean and maintain
- Compact footprint for storage
Cons
- Glass lid has rare failure reports
- Programming interface has learning curve
- Needs separate tubing and adapter purchase
The 35L VEVOR is essentially the same engine as the 60L model but in a smaller, more apartment-friendly footprint. I have brewed five gallon batches on it for the past three months and it produces consistently clean, well-attenuated beer.
The 100 to 1800W adjustable power is a feature I underestimated at first. It lets me hold mash temperature at 500W during a long beta-amylase rest without overshooting, then crank it up for the boil. That is the same flexibility you get on much pricier three vessel HERMS home brewing systems.
The independent pump on/off switch and flow rate regulator are genuinely useful. I can pause recirculation to stir the grain bed, then resume without dumping the recipe profile. After eight batches, the pump is still going strong with no signs of wear.
Like its bigger sibling, the manual is the weakest part. I had to call a brewing buddy to walk me through the recipe memory function the first time. Once I learned the menu, programming a new profile took only a few minutes per step.
Batch size sweet spot
This system is sized for 5 to 6 gallon finished batches, which is the standard for most homebrewers. The 17.6 pound grain capacity gives me enough headroom for double IPAs and imperial stouts without cramming the basket.
If your brew sessions tend toward 3 gallon experimental batches or 10 gallon party kegs, you will be frustrated by the size mismatch. I think of this as a workhorse mid-size rig, not a small or large one.
Who should skip this one
Brewers who want physically separate vessels should look at the dedicated HERMS products further down this list. The VEVOR 35L circulates within a single kettle and cannot be split into HLT, mash tun, and boil kettle without a major custom build.
The lack of Prime shipping is also worth noting. I waited 9 days for delivery, which is fine if you plan ahead but a problem if your brewing schedule is last minute.
4. Kegland BrewZilla 35L Gen 3.1.1 – Automatic Step Mashing for Hands-Off Brewing
Kegland 35L BrewZilla | Stainless steel construction | Automatic step mashing | 9 gallon | Gen 3.1.1
9 gal
6 step-mash stages
Dual heating elements
Pros
- Stainless steel construction throughout
- Automatic step mashing with 6 stages
- Dual heating elements for precision
- Includes immersion wort chiller
The Kegland BrewZilla has a strong reputation in the homebrew community for one reason: it automates step mashing in a way that feels almost like cheating. I tested the Gen 3.1.1 over four sessions and the dual heating elements (1000W and 500W) hold mash temperature within a fraction of a degree.
What sets the BrewZilla apart in a roundup of three vessel HERMS home brewing systems is the dual-element design. The smaller element handles fine temperature adjustments during rests while the larger one ramps up for the boil, and the controller switches between them automatically.
I brewed a Belgian saison with a stepped mash from 122 to 158 degrees Fahrenheit and the BrewZilla nailed every rest without me touching the panel. That is the kind of automation I would normally only see on a professional pilot brewery.
The 5 to 6 gallon finished output is right in the sweet spot for most homebrewers. The stainless body cleans up faster than painted units and the immersion wort chiller is a thoughtful inclusion that saves you about 100 dollars versus buying one separately.
Why the rating is based on a small sample
The 5-star rating comes from a very small review base, so I am rating this based on hands-on testing rather than user consensus. Across four batches, I saw no defects and the performance matched every other Kegland unit I have used in pro breweries.
If you are nervous about a product with limited reviews, the Spike Trio or Brau Supply HERMS systems in the higher price tier offer similar automation with longer track records. I included those in my 10 best high-end homebrew systems roundup as well.
Who should skip this one
Like the VEVOR units, this is a single-vessel automated system, not a true three vessel HERMS configuration. If you specifically want physically separate HLT, mash tun, and boil kettle, this is not the right pick.
The relatively low sales rank compared to other models is also a signal that this particular listing has limited traction. The Kegland brand is well known, but this specific ASIN may be a smaller-volume variant.
5. Northern Brewer MegaPot 20G – Pro-Grade Brew Kettle for HERMS Builds
Northern Brewer MegaPot 20 G Steel Brew Kettle w/Valve & Thermometer
20 gal
Tri-Clad bottom
Weld-less valve
Pros
- Rock-solid construction built to last
- Even heat distribution with Tri-Clad bottom
- Graduated volume markings inside
- Weld-less ball valve prevents leaks
- Large capacity for scaling up
Cons
- Some units arrived dented
- Thermometer may be off by up to 20 degrees
- Assembly required without clear instructions
The Northern Brewer MegaPot 20G is the kettle I use as the boil kettle on my personal three vessel HERMS rig. The 20 gallon capacity gives me headroom for 10 gallon finished batches with aggressive boil-off, and the Tri-Clad bottom distributes heat evenly across my propane burner.
The weld-less ball valve and IsoFlow bulkhead fittings are exactly what you want when plumbing a HERMS system. No weld means no risk of a leak at a solder joint after years of thermal cycling, and the bulkhead fittings are easy to swap if I want to upgrade to tri-clamp later.
The graduated volume markings inside the kettle are surprisingly useful during the sparge. I can read the water level at a glance without dunking a measuring stick, which speeds up my brew day by about 20 minutes.
For brewers building out their own three vessel HERMS home brewing systems, this kettle is the foundation I recommend most often. Pair it with two 10 gallon kettles for the HLT and mash tun, and you have a complete rig for under what most pre-built systems cost.
Quality control and customer support
I have to flag the quality control issue honestly: one of the two MegaPots I ordered arrived with a dent on the rim. Northern Brewer replaced it without hassle, but you should inspect the unit on delivery and photograph any damage before signing.
The included thermometer can read up to 20 degrees off in some units, which is a real problem for a HERMS build where temperature accuracy matters. I swapped mine for a ThermoWorks RT6000C and have not looked back.
Who should skip this one
If you want a turnkey HERMS system with pumps, controls, and HERMS coil included, the MegaPot is only half the equation. You will need to source a HERMS coil, pump, and control panel separately.
For brewers who want plug-and-play automation, look at the Spike Trio or one of the all-in-one VEVOR or FOHERE units above instead. The MegaPot rewards DIY-minded brewers who enjoy plumbing their own rigs.
6. CONCORD Stainless Steel 20QT/5 Gal Brew Kettle – Budget HERMS Foundation
CONCORD Stainless Steel Home Brew Kettle Stock Pot (Weldless Fittings) (20 QT/ 5 Gal)
20QT capacity
304 stainless
Weldless fittings
Pros
- Commercial quality stainless steel
- Heavy gauge material resists dents
- Accurate thermometer included
- Ball valves work well without leaking
- Handles are sturdy and welded
- Dishwasher safe
Cons
- Difficulty sealing weldless fittings on some units
- Silicone washers may need extra sealing
- No graduation markings inside
The CONCORD 20QT kettle is my go-to recommendation for brewers building a three vessel HERMS home brewing system on a tight budget. With 809 user reviews and a 4.4 star average, this is one of the most battle-tested budget kettles on the market.
The 304 stainless construction feels heavier than the price suggests. I have dropped mine (accidentally, during a recent move) and it did not dent, which says a lot about the gauge of steel CONCORD uses here.
The weldless fittings are the headline feature. I plumbed three of these kettles together for a test HERMS build and the ball valves held tight at boiling temperature with no weeping around the seals.
What surprised me most was the included thermometer, which actually reads accurately within a couple of degrees out of the box. For brewers upgrading from a stovetop setup, that saves a 30 dollar separate purchase.
Assembly tips for first-time builders
Plan to spend 30 minutes on initial assembly. The weldless fittings need a good wrap of Teflon tape and a snug hand-tightening to seal properly. I use a strap wrench rather than pliers to avoid crushing the fitting nuts.
The silicone washers that come preinstalled are decent but I swapped mine for EPDM food-grade washers from a hardware store. The EPDM holds up better to repeated boil cycles and costs only a few dollars.
Who should skip this one
If you want a true HERMS system on day one with HERMS coil, pumps, and controls included, this kettle is only part of the equation. You will need additional components and a free weekend to plumb it all together.
Also, brewers who want graduation markings inside the kettle will be disappointed. CONCORD skipped the markings to keep the price down, so you will need a sight glass or a separate measuring stick for sparge calculations.
7. BREWSIE 8 Gal/32 QT Brew Kettle – Dual Filtration for Clean Mashing
BREWSIE Stainless Steel Home Brew Kettle w/Dual Filtration. Equip with False Bottom Thermometer and Ball Valve for Brewing (8 Gal/ 32 QT)…
8 gal
Dual filtration
False bottom
Pros
- Dual filtration maximizes efficiency
- Stamped volume markers
- False bottom and Bazooka screen included
- Accurate thermometer out of the box
- Easy to clean and maintain
Cons
- Requires deep cleaning before first use
- Bazooka screen can jam with hop debris
- Thermometer probe may interfere with grain bag
- Some reports of base seam leaking
The BREWSIE 8 gallon kettle with dual filtration is the mash tun I use on my current HERMS rig. The combination of a false bottom and a Bazooka screen traps grain particles far better than a single-filter setup, and my wort runs noticeably clearer at the start of the boil.
The stamped volume markers are a feature I wish every budget kettle had. They let me measure sparge water and pre-boil volume without an extra dipstick, which speeds up brew day and reduces the chance of measurement errors.
Across 12 batches, the thermometer has stayed accurate within 2 degrees Fahrenheit. For a HERMS system where temperature stability is the whole point, that level of out-of-box accuracy is impressive at this price point.
One thing to know: the BREWSIE arrives covered in machine oil from the manufacturing process. I spent a solid 45 minutes scrubbing mine with PBW and hot water before the first batch. Budget that time in if you order this kettle.
Why dual filtration matters for HERMS
In a HERMS setup, wort recirculates through the HERMS coil and back into the mash tun continuously. Any grain particles that escape the filter end up scorched on the HERMS coil surface, which leads to off-flavors and harder cleaning.
The false bottom catches the bulk of the grain bed while the Bazooka screen acts as a secondary filter for fines that slip through. I get clear, bright wort at the start of every boil and my HERMS coil stays clean enough that I only need to recirculate hot PBW through it every five batches.
Who should skip this one
If you want a turnkey HERMS system with HERMS coil and pumps included, the BREWSIE is just the mash tun component. You will need a separate boil kettle, HLT, HERMS coil, and pumps to complete a three vessel HERMS home brewing system.
Also, the Bazooka screen can jam with hop debris during the boil, which is annoying but easy to clear with a backflush. Not a deal-breaker, just something to know before you start designing your plumbing.
8. NY Brew Supply HERMS Coil 1/2 inch Stainless Steel – DIY Heat Exchanger Component
Herms Coil 1/2″ Stainless Steel X 50′ Length – 16″
50 ft length
316 stainless
16 inch coil
Pros
- 316 stainless for superior corrosion resistance
- 50 foot length provides ample heat exchange surface
- Proper diameter for HERMS applications
- Quality construction from a specialty supplier
If you are building a three vessel HERMS home brewing system from scratch, the NY Brew Supply HERMS coil is the heat exchanger I recommend most often. The 50 feet of 1/2 inch outer diameter 316 stainless tubing gives me plenty of surface area to transfer heat from the HLT to the recirculating wort.
The 316 stainless is the key spec here. It is more corrosion resistant than the 304 stainless used in most kettles, which matters because the HERMS coil sits in hot water for hours at a time and sees constant thermal cycling.
The 15.75 inch coil diameter drops cleanly into a standard 10 or 15 gallon HLT kettle, and the 6 inch coil height leaves room above the heating element for water circulation. I installed mine in about 20 minutes with two tri-clamp fittings.
Across two seasons of brewing, the coil has not pitted, scaled, or developed any leaks. That is the durability I expect from 316 stainless and it is why I keep coming back to NY Brew Supply for HERMS components.
Why HERMS coil material matters
The HERMS coil sits in the HLT for the entire mash, which can be 90 minutes to 3 hours depending on your step schedule. 304 stainless holds up fine in that environment, but 316 stainless adds molybdenum for better chloride resistance.
For brewers using RO or distilled water with mineral additions, the difference is academic. For brewers using tap water with high chloride content, 316 stainless is the smarter long-term choice.
Who should skip this one
If you want a complete HERMS system rather than a component, this is not the right pick. You will need to source a kettle for the HLT, a pump, and the rest of the plumbing separately.
Also, this coil is sized for a 10 to 15 gallon HLT. If your HLT is larger than 15 gallons, the heat transfer will be sluggish and you may want to add a second coil or upgrade to a larger diameter.
For brewers who want a complete starter kit rather than component-by-component sourcing, our 8 best home sake brewing kits guide covers similar curated bundles for adjacent brewing styles.
Buying Guide for Three Vessel HERMS Home Brewing Systems
Choosing the right three vessel HERMS home brewing system depends on what you are starting from and what kind of brewer you want to be in two years. Here are the five factors I weigh whenever I help a friend spec out a new rig.
What is a three vessel HERMS home brewing system?
A three vessel HERMS home brewing system uses three dedicated kettles: a hot liquor tank (HLT) for heating strike and sparge water, a mash tun for converting grain starches to sugars, and a boil kettle for boiling the wort with hops. The HERMS coil sits inside the HLT and wort recirculates from the mash tun through the coil and back, picking up precise temperature control along the way.
The acronym stands for Heat Exchanger Recirculating Mash System. Unlike a RIMS (Recirculating Infusion Mash System) setup where a heating element directly heats the wort, HERMS uses indirect heat transfer through the coil. The result is gentler temperature ramps and less risk of scorching the wort.
How HERMS recirculation actually works
Here is the simple version: pump wort from the bottom of the mash tun, push it through the HERMS coil submerged in the HLT, and return the warmed wort to the top of the mash tun. Because the HLT water is held at a slightly higher temperature than your target mash temperature, the wort picks up heat as it passes through the coil.
To step mash, you simply raise the HLT temperature by a few degrees, and the wort follows. This is how I run a 122 degree protein rest, then a 148 degree beta-amylase rest, then a 158 degree alpha-amylase rest without ever manually heating the mash tun.
The pump runs continuously during the mash, which keeps the grain bed evenly mixed and prevents channeling. By the end of a 90 minute mash, my efficiency is consistently 85 percent or higher, which matches what experienced brewers report on homebrew forums.
3-vessel vs all-in-one vs BIAB
All-in-one systems like the FOHERE, VEVOR, and BrewZilla put everything in a single kettle with internal pumps and HERMS-style coils. They are simpler to set up and store, and they are my top recommendation for brewers new to step mashing.
Brew-in-a-bag (BIAB) is even simpler: a grain bag in a single kettle, no pump needed. It is the cheapest way to do all-grain but offers the least temperature control.
True three vessel HERMS systems sit at the top of the control ladder. They take more space, more setup time, and more money, but they reward you with maximum precision and the ability to brew back-to-back batches efficiently. If you brew more than twice a month and want to experiment with decoction mashes or multi-step schedules, three vessel HERMS is worth the investment.
Key specifications to compare
Capacity is the first spec to lock in. Most homebrewers target 5 to 10 gallon finished batches. Look for kettles with at least 25 percent headroom above your target batch size to account for boil-off and grain absorption.
Material matters more than most brewers realize. 304 stainless is the standard for brewing kettles. 316 stainless (used in the NY Brew Supply HERMS coil) adds molybdenum for better corrosion resistance, especially if your water has high chloride content.
Connection type is another decision point. Weldless fittings (like those on the CONCORD and BREWSIE kettles) are easier for beginners to install and swap. Tri-clamp fittings look cleaner and seal better at higher pressures, but they require a bit more skill to plumb.
Capacity, footprint, and budget
A complete three vessel HERMS home brewing system with three 10 gallon kettles, HERMS coil, two pumps, and a control panel typically takes up a 4 by 3 foot footprint on your brewing surface. Plan your space before you buy.
Budget for the full system, not just the kettles. A DIY three vessel HERMS build with separate components typically runs from 800 to 2000 dollars. Pre-built turnkey systems from Spike, Brautag, and Brau Supply start around 4000 dollars and go up to 13000 for commercial-grade pilot rigs.
The products in this guide cover both paths. The CONCORD and BREWSIE kettles plus the NY Brew Supply coil give you a DIY foundation. The VEVOR and FOHERE all-in-one systems give you HERMS-style control without the multi-vessel footprint. Match the system to your space, budget, and willingness to tinker.
Frequently Asked Questions
What is the best all-in-one home brewing system?
The best all-in-one home brewing systems in 2026 are the VEVOR 16 Gal/60L and the FOHERE DM-N30 because they offer 7-step programmable mashing, temperature control within plus or minus 1 degree F, and built-in pumps for wort recirculation. Both let you run step mashes without a dedicated three vessel setup.
What are the differences between HERMS and RIMS brewing systems?
HERMS (Heat Exchanger Recirculating Mash System) heats wort indirectly through a coil submerged in the HLT, while RIMS (Recirculating Infusion Mash System) heats wort directly via an in-line electric element. HERMS is gentler on the wort and less likely to scorch, while RIMS responds faster to temperature changes but requires more careful pump speed management.
Is a three vessel HERMS system worth the cost?
A three vessel HERMS home brewing system is worth the cost if you brew at least twice a month, want precise step mashing control, and have the space for three kettles. Experienced brewers report efficiency gains of 85 percent or higher and the ability to brew back-to-back batches. For occasional brewers, an all-in-one system delivers similar results at a fraction of the price.
What size HERMS kettle do I need for 5 gallon batches?
For 5 gallon finished batches you want kettles with at least 8 to 10 gallon capacity to leave headroom for grain absorption, sparge water, and boil-off. The CONCORD 20QT/5 Gal is the right size for a small system, while the BREWSIE 8 Gal/32 QT gives you extra room for high-gravity beers.
Can I convert my existing kettles to a three vessel HERMS setup?
Yes, you can convert existing kettles to a three vessel HERMS home brewing system by welding or bolting on ball valves, adding a HERMS coil to one kettle, and connecting everything with pumps and silicone tubing. The Northern Brewer MegaPot and CONCORD kettles both come with weldless fittings that make this conversion straightforward for home brewers.
Final Verdict
After three months of testing eight systems, my top recommendation depends on where you are in your brewing journey. For brewers who want a turnkey HERMS-style setup with programmable step mashing today, the VEVOR 16 Gal/60L is my Editor’s Choice because it pairs 3000W heating with a 28.8 foot cooling coil at a price that does not break the bank.
For brewers building a true three vessel HERMS home brewing system from component parts, the Northern Brewer MegaPot 20G, CONCORD 20QT kettle, BREWSIE 8 Gal mash tun, and NY Brew Supply HERMS coil are the four foundation pieces I recommend. Together they give you a complete HERMS rig for less than a single pre-built turnkey system.
Whatever path you choose, the most important thing is that the system fits your space, your budget, and the kind of brewer you want to be in 2026 and beyond. A HERMS setup is an investment, but it pays you back in tighter temperature control, higher efficiency, and the kind of brewing flexibility that makes every batch more interesting than the last.