Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils

Stainless Steel Coil Heat Exchanger for dutch tub

On sale! Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils,it is a core component to DIY or Commerical-build a wood burning hot tub,made from 100% stainless steel grade 304.

Short Description: Wood fire burning hot tub coil heater, heating coil kit for outdoor unit hot tub.They are always used to heating the water in tank,barrel,tub or swimming pool by burning wood pieces.It is the key part and accessory if you want to DIY building or commerical making a wooden fired hot tub in backyard.

Outstanding Feature: No need electricity or gas, heat water just by burning wood,then enjoy a good outdoor bath…

Material: Stainless steel grade 304,food grade.

Place of origin: Supplier by China Manfacturer direct-sale

Order or Inquiry on “SS Coil Heat Exchanger Coil Heater


A video on “SS Coil Heat-Exchanger for dutch tub,Wood fired hot tub heater coils”

This video was recorded by one of our customer from Australia who brought coil heater from Smartclima.

Models on “SS Coil Heat-Exchanger for dutch tub,Wood fired hot tub heater coils”

Coil Dimension:
Tube size:Tube diamater 25mm * 1.5mm wall thickness
Size of coil part: Dia.35 * 30 height (cm)
Horizontal tail pipes: 46cm
Tube end:Threaded
Circles:8 circles.
Supporter(in Option 1B) height: 25cm(if you require other height,please let us know when place order).
Notice:The below pictures are just for reference
Package:1 unit / package.

Type A Option 1A&1B:
Heater Coil  only (Type A Option 1A);
Heater Coil  +Supporter+ Fire holder (Type A Option 1B)

Hot tub heater coil option 1A coil only
Hot tub heater coil option 1B coil kit

Type B Option 1A&AB:
Heater Coil  only + Control valve (Type B Option 1A) ;
Heater Coil 
+ Control valve +Supporter+ Fire holder (Type B Option 1B)

This is coil heater type B option 1A wood fired tub coil heater type B option 1B

Instruction: For type B coil kit comes with a brass control valve with in-water quick connector.  The brass valve is used to let you control the water temperature in tub:when feels water is too hot,just shut off the valve,and the water stop flowing immdiately to prevent water temperature from rising. The quick connector is used to let us connect water pipe to water source fauce.After irrigate the water to a suitable height( usually need to be over than the upper pipe port),just shut off the small valve.

Type A  Option 2A&2B:
Heater Coil + Detachable Flanges (
Type A Option 2A);
Heater Coil  +Detachable Flanges + Supporter+ Fire holder (Type A Option 2B)

wooden fired tub heater coil option 2Awooden fired hot tub heater coil option 2B

Type B  Option 2A&2B:
Heater Coil + Control valve +
Detachable Flanges (Type B Option 2A);
Heater Coil  +Control valve + Detachable Flanges + Supporter+ Fire holder (Type B Option 2B)

wood burning tub coil heater type B option 2A

DIY wood burning hot tub`s parts coil heater type B option 2B

Type A Option 3: Coil Kit,Comes with accessories(See below description):

Stainless steel hot tub coil kit option 3 Stainless steel heat exchanger coil for wooden fired hot tub option 3

The option 3 kit includes:
  • SS coil,used for heat the water in tub;
  • Stainless steel flange,to install the coil onto the tub;
  • Smoke Guard,prevent smoke blow to the person in tub;
  • Wind Guard,prevent fire heat blow to the air.This guard is helpful to keep heat and improve coil working effience;
  • Wood Basket/holder,to hold burning wood under the coil,hold fire;
  • Water flowing stopper.When the heater coil is working,maybe you will feel the water in the tub is hotter and hotter,and then you want to prevent the water into the coil from heating.Then,you can use this accessory-water flowing stopper,very easy to use and stop the water flow into the coil immediately.A very useful item.
  • Ground stand.(If no special requirment,will delivery height 250mm).

Type B Option 3: Coil Kit,Comes with accessories(See below description):

DIY wood burning fired hot tub part coil heater type B option 3

Type A Option X: Heater coil + Flexible extending hose + Attached flange valve,(options:  fire holder; ground stand)

Option X comes with tank/tub/barrel connector kit as following,and use high-temperature-standing hose to connect heater coil and tub. This design is widely used when DIY your wood burning hot tub. The connecting kit has ball valve,when the water in tub is over heat,you can close off this valve,easy to use.

wood burning coil heater with connector fired heating coil for hot tub with connecting tube

tub tank or barrel connector

The connector has two size 25mm and 32mm, to connect coil with different pipe diameter:25mm and 32mm.

Type B Option X: Heater coil + Control valve + Flexible extending hose + Attached flange,(options:  fire holder; ground stand)

DIY hot tub part coil heater with valve

 Details for “SS Coil Heat-Exchanger for dutch tub,Wood fired hot tub heater coils”

Want to DIY a Backcountry Hot Tub? These heater coils are for you to DIY a firehot tub project in your back garden.

Wood Fired Thermosyphon Heater,hot tub heat exchanger,burning a fire with wood outdoor in coil,as the best important part designed especially for  dutch tub,Pool Heater ,and wood fired outdoor hot tub,burning a fire in the coil to heat cool water,used as heat exchanger,utilizing thermodynamic nature circulation cycle principle to heat the water in the tub,circulate the water through the coil(water comes in at the bottom of coil,heats up,and thus absorb heat energy from hot coil tube,and then flows out at the top back into the tub),thus also named Hot tube heater coil.

Made from polished stainless steel food grade 304 with high heat exchanging effience and perfect heat transfer efficiency performance,stability material properties.Has excellent temperature resistance , can prevent Frost Crack evaporator in the low temperature ,will safely working at minus 270 Deg C to 400 Deg C.Maximum Working Pressure:4.5Mpa,can heat more than 200gallon water.

Used for water tub for having a outdoor bath.The heater coil is usually used for DIY your own backcountry camping hot tub,dutch tub water heater,then have a bath,relax yourself!




stainless steel polished-pipe

hot tub tread with cover protector

Water flowing stopper for heater coil

Advantage of fire hot tub heater coil :
1.The heater spiral coil is made of seamless stainless steel(304) tube,can stand high pressure.
2.Sanitary&Healthy.As the material is Food Grade stainless steel 304;
3.Long service life.As the heater coil is made from quality stainless steel tube,it is anti-corrision,and thus,it is the best choice for the ourdoor enviroment;
4.Not heavy,it is easy to transport and is good choice for camping experience;
5.For manufactuing,we can process it into any shape and size by your design.Customized dimension is accepted.
6.Nice looking,the surface is polished and reached food grade standards.
7.Smooth inner surface and the water can circulate in the coil,small pressure-drop;
8.Has excellent temperature resistance , can prevent Frost Crack evaporator in the low temperature ,will safely working at minus 270 Deg C to 400 Deg C.
9.With stainless steel flanges to attach onto the hot tub;
10.With all accessories for you to build a complete hot tub.
11.Give you a good outdoor bathing experience,enjoy your spare time.

Feature :
[1]Stainless steel have strong material strength ,the tensile strength is better than other materials ,
[2]Stainless steel heat exchanger have many advantages ,such as strong pressure ,stability material properties ,high heat transfer efficiency ,wouldn’t contaminate medium and without refrigerant leakage .
[3]Stainless steel has excellent temperature resistance , can prevent Frost Crack evaporator in the low temperature ,will safely working at minus 270 Deg C to 400 Deg C.
[4]Stainless steel has good mechanical properties and good hot work ability for stamping and bending ,no heating treatment hardening.
[5]Can attach to Fiberglass Soaking Hot Tub,portable waterproof cloth tub,old traditional tin tub,wood tub,and other bath tub.
[6]principle:The basic coil was housed in a heater where firing, fire inside of coil produce heat,and exchanges heat to the water recycling inside the tube;Can use it in a straight sided bath tub;

Application :
Used as hot tub heat exchanger.If you want to build a backcountry camping hot tub,this Stainless steel spiral coil is is the best choice.This coil heat exchanger is widely used for you to DIY build an outdoor hot tub for having a nice bath outdoor and used as Wood Burning Pool Heater.It is the best part for you to DIY your own wood fired hot tub.

wood fired coil heater

 How to order “Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils”

  • The fire hot tub coil is available for retail and wholesale;
  • The item takes large packing dimension,therefore,takes much volume weight.The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
  • Accept bulk order with Container delivery;
  • Pls indicate us the quantity you need,so that we can calculate the shipping charges;After you confirm the price,we`ll send the invoice via Paypal for you to pay.We also accept payment method of Western Union or Bank wire;
  • Please contact us to email: [email protected]
  • To today,we already sold out more than 1500pcs Stainless Steel Coil Heat Exchanger for dutch tub,and get 100% positive feedback!  
Order or Inquiry on “SS Coil Heat Exchanger Coil Heater


 General Knowledge on “Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils”

principle Wood-Fired-Hot-Tub-workingThe Firehot Coil Heat Exchanger works depending on the principle of natural hot circulation.  Natural hot circulation refers to: in a closed system,depending on density difference between hot and cold water,to form circulating liquid to drive an energy transmission. In the dutch tub coils,the cold water flows in from the bottom tail pipe,and goes up in form of spiral state,during this process,absorbing fire heat to let the water inside gradually become hot,and finally flows into the tub.During this cycle,the water in the tub becomes more and more hot…For DIY your own outdoor hot tub,please refer to this article.

The wood fired Hot Tub,used as hot tub heat exchanger, was just to utilize the Coil Heat Exchanger works depending on the principe of natural circulation to warm water to have a bath.

Without electricity or gas, some persons can enjoy bathing together in a Wood-Fired Hot Tub in free and relax yourself at most.

This simplicity still appeals to many people. But also the rituals around it, like gathering the wood, burning the wood, regulating the stove and the heat, mixing the water up front. And then enjoy the rising steam and noises from the heater…….

In that respect a Wood fired Hot Tub is a total different product compared with the Jacuzzi from today which is working on electricity.

What is a Wood fired Hot Tub? A Hot Tub generally consists of the following components:

A heater / stove (made of stainless steel) being a sort of metal container below the water in which you can burn the wood. This heater has 2 openings that are above the water, 1 for air and landing with a wooden lid with wooden handle, and 1 for smoke exhaust. All our stoves are made of 2-3 mm stainless steel.

A chimney connected to the air pipe of the stove. This is a long metal pipe with a cap that serves as a spark arrestor.

A protective panel around the stove protecting you from burning on a hot stove.

Benches all around, so you can sit and relax. On request benches are removable for cleaning purposes.

Drink holders depending on the model attached to the cap of the stove, sometimes attached to the exterior. You can keep your drink or snack at a place holder.

A ladder, to be able to take place in the wooden bathtub.

A lockable wooden lid, Wood-Fired Hot Tub at the end when you can not use it. This prevents such leaves may fall, or insects get in the water.dutchtub-works

A stop so you can dirty water drains and evt. aanluitmogelijkheid one can achieve in the stormwater or sewer for dirty water.

Stainless Steel Coil Heat Exchanger for dutch tub is the rings around the Tobbe Tobbe which you can sue. Suppose that Tobbe has shrunk slightly in dry weather, you can tighten the straps slightly. On the stove side you can usually tighten the straps. This is a great product!

 Helpful articles or resource on “Wood fired hot tub”

Enjoy outdoor hot bath

Want to enjoy an outdoor hot tub with a wood fire coil heater (as picture shows)? For many people, this is a romantic, luxurious and inaccessible lifestyle. However, this is possible to DIY a hot tub like this and it is not difficult. So in the following article, we will share more comprehensive steps for DIY a wood burning hot tub. Hope it is helpful to everyone.

First, prepare the following materials and tools:
A bathtub. You can get a bathtub from various channels, you even can also use an old bathtub to retrifit it, or you can use wood pieces to build a bathtub yourself.

Some copper pipes and stainless steel tubes and water tank connectors.The diameter of copper tube should be bigger than 19mm in order to have a good heating speed.

Prepare a drill for drilling holes on the bathtub.Alternatively, you can add an optional drain plug to the side of the bathtub near the bottom so that you can easily drain water as needed.

The following steps you can follow:
1. Choose where to build the bathtub.From the simplest perspective, you must decide where to build the bathtub. If unsure, look for an area that will not affect the house or its light at all, preferably near to water.

2. Prepare the ground.Once you decide where to build your bathtub, you need to level the ground and remove things like spikes that could damage the bathtub. Then place the bathtub on that flat ground.

3.Make a heating coil. You can use copper tube to bend to be coil to heat the water in the bathtub. Or you can buy a good Stainless Steel Coil Heat Exchanger for dutch tub  directly from Smartclima, it has a more reasonable design, it heats up faster, and it looks more beautiful.

4. Drill holes on the tub or tank.Use a drill to make holes next to the bathtub or water tank. The size of the hole should match the size of connection kit. The position of the hole should be determined according to the position of the inlet and outlet pipe of the heater coil.

5. Add accessories. Put the water tank connection fitting through the hole and sealed it with a silicone sealant. Then connect the heating coil and bathtub connector with a high temperature resistant water pipe.The ends of your own heating coils may be slightly bent, so trim them before inserting them into the accessory. Put some bricks under the coil heater so that the height of the coil is consistent with the height of the bathtub hole.

Done. Then fill the bathtub with water and burn wood in the coil. Note that the height of the water in tube should be higher than the opening hole in the bathtub, this can greatly shorten the heating time.

Improvement ideas:

It is recommended to use plastic bathtubs or wooden bathtubs, as this will help to save wood.
Creating a stove-like enclosure around the coil will make the system more fuel efficient and help draw the smoke out of the barrel.
If the cost allows, it is recommended to increase the number of coils, which will speed up the heating.
It is recommended to use larger diameter copper and stainless steel pipes to increase the heating rate.

108 Inquires to Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils

  1. Hi,
    I would like to get an offer for Option 1B including Option X (hot tub clamp connector with valve diam. 25mm + rubber hose2m)

  2. Hallo könnten Sie mir gewerblich einen Preis katalog zukommen lassen und Versandkosten nach Deutschland. Vielen Dank schon mal vorab. Karsten Moschner

  3. Hello,

    Could you please send me a catalogue with prices of all the options and eventually freight to Colombia, South america?

    I am mainly planning to buy 2 of option 1A or 1B.

    Thanks for your prompt reply.


  4. Hello I am interested in the Option 1A. How much does that run and how do I go about making a purchase?

  5. I would like to prices and estimated delivery time to Toronto Canada on the heat coils – all packages please.
    Pam Gawn

  6. Please can you send me a full price for coil and all the fittings please and the price to send it to the United Kingdom. Many thanks

  7. Good day
    I’m based in the uk and looking for prices and delivery for the 1A and 1B stainless steel hot tub heating coils.

    Kind Regards

  8. ’m interested in buying one of these heater coils please tell me the total cost including shipping to Belgique

  9. I’m looking to convert a 5 person hot tub to wood fire. What is the price for the largest coil shipped to Canada?

    Thank you.

  10. Good Evening

    What is the best price for 1B stainless coil (to fit to a 1000 ltr tank, need pastic fitment also to tank In and out.

    Fire stand
    Stainless steel stand
    plastic in and out connectors to tank
    Flange on coil
    possible 2 short lengths of plastic pipe

    PLUS to you sell ex display at all. Thank you. Please peruse over enquiry. LUCU.

    • Hello,

      Im intrested in heater option 3, butt then with connerctors for an platic tub for trees. I understand that you have thees kind of conrectors so i can drill holles my self. What are the costs including shipping to the netherlands(Holland).
      I like to hear from you,

  11. How much for a stainless steel DYI heater exchange coil shipped to the United States Sandy, Ut 84094

  12. Hi I would Luke to find out your prices on hot tub heating coils
    Not sure which one yet can I have a price on them all?
    And lead times?

    Many thanks

    James lyons

  13. Hi! I am inquiring about to purchase option 2 or 3b. To be mailed to North Carolina, USA.
    Can you please give pricing?

  14. Bonjour,

    J’aimerais commander un échangeur serpentin en inox mon volume d’eau à chauffer est de 885L dans une cuve en acier galvanisé pouvez-vous me communiquez vos tarifs et délais SVP pour une livraison à Pornichet (44380) en FRANCE.
    Vous en remerciant par avance
    Dans l’attente de vous lire

  15. سلام آیا بعد از گرم شدن آب در کلکتور نیاز به پمپ داریم که آب گردش کند یا خیر

  16. Please quote me on a coil heater 45mm pipes with all extras, flanges etc etc, delivery to cape town south africa

  17. Hello,

    I had a few questions about the coil… I have been researching now over a month.
    I seen this method of using coil. Is this a stainless steel coil? Do you sell pre-made copper coil?

    Also I was thinking of buying a Wood fire hot stove…. would I need a coil then?

  18. Interested in a coil with straight ends, no threads or flange, with supports, bottom fire screen and smoke shield sized to heat a 300 gallon stock water tank. What would the price and shipping be to Cincinnati, OH, USA, 45174.


  19. Dear

    I’m interested in your solution option x to build it into our hot tub system

    Is it possible to get more info in your prices, delivery time and shipping costs (Belgium)

    Based on your information and our calculations, the following setup would be needed:
    – coil 32mm tube, 9 circles, Coil Dia.350mm
    – supporter
    – fire holder
    – smoke and wind guard
    – hot tub clamp connector.

    Thank you to inform me.

    Ewout Van den Broeck

    • Hello,Ewout.Noticed your message and happy to cooperate with you.And email with price for the coil heat exchanger kit was already replied to your mail address.Pls check your inbox. Thank you.

  20. HI,Smartclima! I want to resell your products in US,mainly in my Amazon shop. I made particular investigation on wood burning hot tub,especially the heating coil.Finally,I`m lucky to find Smartclima,it seems a brand,and seems having very professional experience on manufacturing wood fired hot tub accessories.My plan is to order more than 10units(coil) every time,could you give me a good discount?At present,I`m running 3 shops on Amazon and 1 shop on ebay.

    • Hello,Simon,
      It`s happy to receive your message.And of course,we can give you good discount in bulk order to let you have profit when reselling.More details and price sheet will be sent to your email address,please notice to check.

  21. Hi I would like a specification and price for a coil to heat a 1000 ltr tub Your option 3 please

    i have no issue with space of smoke as i am on a coastal location by the sea i intend to use salt water so the grade of stainless steel should be suitable

    I would like a coil that will heat the tub as quick as possible

    delivery to Ireland post code T45 CC67


    Sidney Mc Elhinney

  22. Hi, Could you please quote for me:Stainless Steel Coil Heat Exchanger for Dutch tub – buying option 3. Delivered to Canberra Australia post Code 2615.It seems charming that to heat my tanks water by burning wood only.I want to make an outdoor hot tub myself. thanks

  23. Hi,
    I’d like to purchase a stainless steel coil heater delivered to Toronto, Canada. What is the cost?And is it possible to equip with stove and chimney?

  24. Hello,

    Could I please get the price of Option 3 for the heating coils? that is going to used for a wooden barrel. Thank you for your time.

    Gail Hillsgrove

  25. Hello, I am curious about the price and timing for the heater coil option 2 and option 3. We have a dutchtub Knockoff with the flanges but had the coils freeze and rupture. I live in Colorado…Thanks Pete

  26. Hey there, I’m interested in buying a heater coil for my hot tub! I have a hand-made copper one that I use, but if I can find a good source of professionally made ones I can start selling the tubs. Let me know prices and delivery times!

  27. David Kotevski
    Hi I need a purpose built larger heat exchange coil, with more turns and possible with a wider diameter and thicker gauge pipe. Has your company got the facility to make such variations to to the product. What is your maximum coil diameter size and what is the maximum coils of circle. Could you please let me know.


  28. I`m from Germany,and my coil heater arrived last month,and I used it with my own tub together to DIY built a wooden fired hot tub.Seems very nice and good looking. Thanks for Smartclima`s excellent coil,it is so good quality!

  29. Heater coil (Option 1) arrived yesterday and I’m really pleased with it. Communication from Johnhua was excellent throughout, air delivery to the UK was really fast considering it came all the way from China. No problems with customs or extra charges and tracked all the way to my door. Delivery guy thought I had ordered bagpipes.

    The reviews on this website really helped with my decision to buy so I felt I should share my experience. I’ll be installing this on an above ground swimming pool to supplement an electric heater, it’s 10.7m3 capacity so I’m not expecting anything close to hot tub temperature, but if I can get 4-5C increase over a few hours I will be delighted. Fingers crossed.

  30. I would like to inquire the price for option 1 coil and option 3 coil to send to The Netherlands in Europe.
    I am looking for a coil to heat 1000 liter Tub.
    very much obliged.

  31. Hello , l would like to get a cost to purchase a heater coil kit and have it shipped to Alberta, Canada .
    Thx , Clint

  32. Hello,
    I am interested in Your Buying Option 3 or eventually Buying Option 2.
    I want to heat a 1700 liter hot tub from 5 Celsius to 37 celsius in around 3 hours.

    Is it may be better to use 2 smaller heat exchanger parallel instead of one large.

    What will be the overall cost including shipping to Austria?

    best regards

  33. Hi,

    I have a 2.5m3 wooden hot tub, that i want to heat with a 22kw woodburner with backboiler, I would like to pump thru 22mm pipe to your coil immersed in the water, the water is 1000mm deep. what size of coil would you recommend and the price of the coil delivered to northern ireland

  34. Hello! Im interested in purchasing a coil for a stock tank diy hot tub set up. Are you still selling these?
    Do you have any suggestions for which set up to purchase? It looks like flanges and a bottom tray for the fire might be good to have.


    • Dear Irene. We have 3 options for you to choose. Option 1 coil only, option 2 coil and flange,and option 3 coil kit .When you choose option 3,please indicate us which height of support leg you need. For more details,our people will contact you by email. Thank you.

  35. Hi!

    I have pool with 2000 liter.
    What coil do you have for that one?
    And what length and diameter options do you have on the coil? Do you have 32mm? What material do you use? What is the weight?
    Please let me know of cost for coil and shipment cost and lead-time to Stockholm, Sweden?

    I also wonder how much is a ready to use “dutch”tub for 4 person and shipping to Stockholm, Sweden.
    Many thanks!

    • Hello,Lasse,
      Ok,will communicate by your private email.We are happy to help you to built hot tub system with our coil heater.

  36. Hello,

    I would like to know the price and delivery costs in sending a heater coil for options 1,2 and three to Poland.

    Kind regards,

    • yes,we have 32mm tube coil. For heating much water in hot ,we suggest to use 12circles with 32mm SS tube.

      Thank you.

  37. Hi,

    I’m interested in purchasing heating coil for my hot tub. What is the price range (including shipping) to Poland? What king of information do I need to supply to build a coil for me?


  38. I’m after a quote for 1 coil for heat exchanger to be made and shipped to Australia. I’m located in Victoria and would require door to door postage as part of the quote.the application is water heated from engine exhaust at maximum 2000psi for carpet cleaning machine. pump rated at 15 litres per minute.
    dimensions are slightly flexible, 4 layer coil, height between 320 & 350mm, 3/8 stainless tube with 100mm legs at same end to future fit compression fittings.
    approximate centre tube diameter of each coil. 49.5mm, 78.5mm, 107mm, 135.5mm. this should be approx. 30-35metres.
    The housing will be 1555 diam x 430mm long.

  39. Hi, could you please send me pricing on the coil heat exchanger for a Dutchtub and also with all the accessories.
    Kind Regards
    Simon Bradley

  40. Due to the current state of things over here all my fun little projects have been put on hold now.
    Sorry about messy you around like this, it actually came out pretty cheap to make the entire hot tub using your coil and good quality hard wood, which is annoying.

  41. Hello,I`m DIY building my outdoor hot tub in the back garden.Your coil seems very helpful.But I still need you to help me customize a heater coil which suit to my tub.Contact me,please

  42. I couldn’t express how much I like this coil. The tube is polished,looks very nice,and I feel the water inside can flow smoothly and “happily”. Ago,I had some troubles because of direct flames which burn my clothes when mixing up my potions. But now,with the indirect flame and wind and smoke shield, I can wear cloth leisurely,no worry other thing.

  43. Hi, what is the price (+ shipping to new zealand) for option 2 with the additional support for the heater coil.

  44. About 10days ago,I got two coils from Smartclima.Arrived very well,no any broken.The coil is polished,looks very nice.I am DIY building my own wood fired hot tub in back garden.The coil heats up the water in tub very hot and very quickly. I`m pleased with this purchasing experience.Thank you very much.

  45. Please advise quote price for
    Stainless steel Coil Heat exchanger for wood fired hot tub

    Also include delivery quote to Melbourne Australia

    Many thanks

    Jenny Chapman

  46. Last week,the coil kit was delivered to my house.Have set it up and it is working well.
    There seems to be a slow leak out at the bottom,I know it was caused by my clumsy installation.But no problem,I already fix that and seal it with silicon. Overall,it is a good item.
    I have friends asking me where I got it from,and I already introduced your website, so you might get more orders. ?

  47. I ordered one of these heat exchange units delivered to Seattle, US for a custom tub I am building. The price was competitive and delivery was timely. Thank you!

    • Glad to know you enjoyed a good purchasing experience.thanks for your comment.if you can share the customed hot tub here,will be very thankful.

  48. Hello,arrived the heater coil yesterday,same as described on the web.A little pity that there is a small scraping on the tube,I think it is caused during transport,but no problem for the using.Good product and great service,I`m satisfied with the purchasing experience.Thank you.

  49. The exchanger arrived a few weeks ago.
    Just wanted to say many thanks to you – it looks very good.
    I will send a picture of it when I build the hot tub.

  50. Rather than purchasing a pre-made firehot bathing tub, I want to DIY my own bath tub with your heating coil and solid wood.I think it is simple and cheap cost.Could you help me?

  51. hello,I`m building my hot tub.The project need coil of stainless steel tubing inside fire wood to heat the flowing water.I need it to include wood basket and SS grade 304 flange fittings which are cast into the tub. I looked into the dutch tub coil and also viewed your website,I found the two are very similiar.Could you quote us the price for above to UK?Thank you very much.

  52. Want to enjoy a hot bathing in cold winter evening and so Interested in purchase the coil kit to Construct a low cost hot tub with wood fire. Please advise price.

  53. Hi,I gout yout stainless steel heat exchangers coil samples.I`m pleased with them . Could your company make similar ones to a different size, to order ?
    I have joined the two I purchased from you and using them in an indirect heating system I have built to heat a swimming pool using a wood burner. I am thinking of perhaps marketing my prototype wood burner boiler and would need a purpose built larger heat exchange coil, with more turns and possible with a wider diameter. Has your company got the facility to make such variations to to the product I have purchsed from you?

  54. Hello, please send me total cost for Stainless steel coil heat exchanger with delivery to Czech Republic? Thank you.

  55. I live in the Germany and I want to build a wood fired hot tub.Already have wooden tub,and I want to purchase stainless steel coil heat exchanger from your company.Can you sell the coil with two 1″ flangers?Because I already installed corresponding flanges onto my tub tank.If that is ok,I want to buy more.Thank you.

  56. I’m interested in buying one of these heater coils please tell me the total cost including shipping to Australia.



  57. I an interested in the stainless steel heater coild cost and the cost of shipping to Texas, USA.

    Thank you,


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