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DuraVent PelletVent Pro Wall Thimble Air Intake Kit: outside air and exhaust share one wall opening
The DuraVent PelletVent Pro Wall Thimble Air Intake Kit is a sleeve that carries pellet stove vent through an outside wall. An inlet in one corner supplies outside air for the stove’s fire through that same opening. You won’t need a second hole. PelletVent Pro is DuraVent’s double wall pellet stove vent: a corrosion resistant stainless steel inner pipe inside a galvalume outer pipe, sold in 3 and 4 inch sizes. The sleeve fits walls 4 to 8 inches thick and keeps the vent 1 inch from anything that can burn.
The kit includes 10 feet of flexible hose, clamps, and an insulation ring to block drafts around the pipe. Choose a 3 inch sleeve with 2 inch hose, or a 4 inch sleeve with 2 or 3 inch hose. Match the sleeve to your vent and the hose to your stove’s air connection. Only metal hose connects to the stove, never plastic. Prefer a separate screened air opening? See the DuraVent PelletVent Pro 2 Inch Fresh Air Intake Kit. The DuraVent PelletVent Pro Wall Thimble Air Intake Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3PVP-WTI | 4PVP-WTI | 4PVP-WTI3
Applications
PelletVent Pro® is a venting system designed for stoves and inserts that use wood pellets and oil fuel. It is also built to vent biofuel products such as corn, switch grass, cherry pits, soybeans, coffee husks, sunflower hulls, walnut shells and wheat, to name a few. (Rated for continuous use flue temperaftures up to 570°F.)
Materials and Construction
Laser-welded, double-wall pipe with a .012″ inner wall of 444 stainless steel and a .018″ laser-welded galvalume outer wall. Painted black exterior available. Primary metal-to-metal connection seals joint. Encapsulated o-ring provides a secondary seal.
Clearances
1″ clearance to combustibles in the USA and Canada for appliances using corn and other biofuels, wood pellets or oil.
Shrouds
UL Listed with Duravent shroud specifications.
Diameters
3” and 4”
Listings
c-UL-us Listed to UL 641 (MH8381 and MH14420).
ULC Listed to ULC S609, ULC/ORD C441 (CMH1439 and CMH1440).
Instructions
- Factory-Built Chimney Relining Supplemental Installation Instructions for PelletVent®
- PelletVent Pro® Installation Instructions
- PelletVent Pro® Installation Instructions (French)
- PelletVent Pro® Installation Instructions (Spanish)
- Two Piece Clean-Out
Typical Installation
Refer to our Typical Venting Installation drawings to select the appropriate component parts for your installation.
- The inner pipe diameter should match the outlet size of the appliance. For installations that require 4″ vent and the appliance has a 3″ outlet, use an Increaser Adapter 3″-4″.
- Check the appliance manufacturer’s installation instructions to confirm which types of vent configurations are permitted (i.e. horizontal, vertical, chimney reline, etc.). Also, check for any venting restrictions such as maximum horizontal run, minimum and maximum vertical rise, maximum offset, etc.
- Be fire safe! Maintain the minimum clearances (air-space) between the vent pipe and nearby combustibles, as specified in the appliance manufacturer’s installation instructions. Use proper support and bracing. Follow local building codes and have your venting system inspected.
| Installation Key | |
|---|---|
| 1 | Vertical Cap |
| 2 | Storm Collar |
| 3 | Flashing |
| 4 | Cathedral Ceiling Support Box |
| 5 | Straight Length Pipe |
| 6 | 45° Elbow |
| 7 | Appliance Adapter |
| 8 | Flex Length |
| 9 | 90° Elbow |
| 10 | Horizontal Cap |
| 11 | Wall Thimble |
| 12 | Celling Support Firestop Spacer |
| 13 | Tee w/Clean-Out Tee Cap |
| 14 | Wall Strap |
| 15 | Attic Insulation Shield |
| 16 | Prairie Termination Cap |
Planning Your Installation:
| 1 | Refer to the Typical PelletVent Pro Installations diagram, on the opposite page, to be familiar with some of the standard PelletVent Pro installations and the required component parts. |
|---|---|
| 2 | For a horizontal termination, you will need a Wall Thimble and a Horizontal Cap. The cap must be installed with a 6″ clearance to the outside wall (refer to appliance manufacturer’s installation instructions for other clearances). |
| 3 | For a vertical termination, you will need a Cathedral Ceiling Support Box or Flat Ceiling Support, Attic Insulation Shield (if passing through an attic), Flashing, Storm Collar, and Vertical Cap. |
| 4 | Determine the length of PelletVent Pro pipe required. For a vertical termination, measure the pitch of the roof and select the proper flashing. The required minimum height above the roof is 12″. |
| 5 | Pellet stove inserts in masonry fireplaces will require a flex pipe to snake the vent past the smoke shelf. For transition from PelletVent Pro to an existing DuraPlus, DuraPlus HTC, or DuraTech Chimney, a Chimney Adapter is available. |
| 6 | For vertical rise of PelletVent Pro on the outside of the house, Wall Straps should be used at 4′ intervals to provide proper support. |
| 7 | Important! Check to be sure that the appliance and the venting system are in compliance with all minimum clearance to combustible requirements. |
The following design recommendations are a general guideline to assist in the design and selection of venting components for your installation. Always follow Duravent Installation instructions before installing your chimney system (found with the cap or support box).
- Size the vent to meet the appliance manufacturer’s specifications.
- Avoid long runs and excessive use of elbows. Refer to the appliance manufacturer for minimum rise and maximum run configurations for the venting system.
- Use an Appliance Adapter to ensure a proper connection to appliance. Seal adapter to appliance with high temperature sealant.
- Use a Single Tee with Clean-Out Tee Cap to facilitate easy cleaning. It is recommended to use a tee off the back of an appliance.
- In the United States and Canada, maintain the minimum 1″ clearance (air space) from vent pipe to combustibles. Use proper support and bracing. Follow local building codes and have your venting system inspected. Be fire safe!
Product Resources
Catalogs
Bulletins
- 01. PelletVent Pro® Harman Adapters Bulletin (2020-08-03)
- 02. Product Discontinuation Notice Bulletin (2019-11-25)
- 03. New PelletVent Pro® Tee Bulletin (2018_02-28)
- 04. New PelletVent Pro® Tee Bulletin (French) (2018-03-25 )
- 05. Oil Sizing Chart Bulletin (2017)
- 06. Ravelli Adapter for PelletVent Pro® Bulletin (2015)
- 07. Ravelli Tee Adapter for PelletVent Pro® Bulletin (2015)
- 08. PelletVent Pro® Horizontal Cap Bulletin (2014)
- 09. Black Paint Bulletin (2014)
- 10. PelletVent Pro® Prairie Cap Bulletin (2012)
- 11. Harman Adapter for PelletVent® Pro Bulletin (2011)
- 12. Recommended Touch-Up Paint for Duravent’s Black Finished Products Bulletin (2011)
Brochures
Sales Sheets
Educational Papers
Videos
PelletVent Pro® Tee: New Double Spring Button Design Video
PelletVent® Horizontal Installation Video
PelletVent® Installation Guide Video
FAQ
What does the Wall Thimble Air Intake Kit do?
It brings outside combustion air to the pellet stove through the existing wall thimble, so you do not cut a second hole in the wall. The kit includes an insulation ring that reduces air infiltration where the pipe passes through the thimble, a 10-foot length of 2-inch flex hose and clamps. It is patented and can be used in the US and Canada.
Which size option do I need?
Choose the vent size first: 3-inch for a 3-inch PelletVent Pro thimble, or 4-inch for a 4-inch thimble. The 4-inch kit is listed with either 2-inch or 3-inch flex, so match the flex to the stove’s air-intake collar. All three versions are on the selector above; the stove manual gives the collar size.
How is this different from the Fresh Air Intake Kit?
The Fresh Air Intake Kit terminates the intake at its own screened opening anywhere the flex reaches; this kit uses the wall thimble that the exhaust already passes through. Choose this one to avoid a second penetration, the other when the intake needs to be somewhere else. Both give the stove outside air rather than room air.
Does using this kit change the termination clearances?
It can. DuraVent’s instructions say that with the Wall Thimble Air Intake Kit the installation may be considered direct vent under NFPA 211, which allows the exit terminal 6, 9 or 12 inches from a building opening depending on the appliance input, with the terminal and intake at least 12 inches above grade. Check with your local building official first.
Does the thimble still need sealing?
Yes. Caulk the vent pipe to the thimble with 500 F RTV silicone as the PelletVent Pro FAQ requires, and the insulation ring in this kit closes the gap around the pipe against drafts. Keep 1 inch of air space between the vent and combustibles; the thimble’s framed opening is 7-1/2 by 7-1/2 inches for the standard thimble.
Is outside combustion air required for a pellet stove?
Not by this kit, but many stove manuals and some codes require it, especially in tight or manufactured homes, and it stops the stove competing with the house for air. Read the stove manual first. The exhaust side still needs its own PelletVent Pro pipe, thimble and cap; this kit only handles the intake.
Shipping / Freight / Return Info
Same-Day / 24 hour shipping
Same-Day/24 hour shipping - If we have the product in stock, we can ship same day if ordered before 12pm Monday - Friday (CST).Freight Claims Policy
- Open and inspect the order while the delivery driver is present. If delivery driver does not provide sufficient time to do so, please notate the delivery receipt.
- By signing the delivery receipt without noting any damage or missing items, you confirm that your order arrived complete and in excellent condition.
- Record any damage or missing pieces directly on the delivery receipt.
- Do not discard damaged item(s) or any original packaging. For severe damage, write “Refused due to damage” on the delivery receipt and contact us immediately.
- Report any damage within two business days, including delivery details and photos showing the issue
- Damaged item(s) must be returned within 30 days. Failure to return them will result in a charge to the original payment method.
Return Merchandise Authorization Policy
- Submit your return request within 30 days of delivery.
- You will receive an email within 1-2 business days confirming whether your return request has been approved or denied.
- Please also note that a 20% restocking fee may apply to approved returns
- If approved, you will receive an itemized Return Authorization, return shipping labels (if requested), and detailed instructions within 1–2 business days
- From the date this email is received, you will have 14 days to return the product.
- Once our distributor receives and inspects the returned item(s), your refund will be issued within 1–2 weeks
- Items returned outside of this process or time frame are not eligible for a refund.
Customer Reviews
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What Our Customers Say
D
A sauna turns your garden into a spa oasis. We debated it for a while, but after renovating our house, we pulled the trigger and bought a sauna from Norse Steam and Maya. She was always super responsive and helpful throughout the process. Don't kid yourself, getting a really nice sauna is not that easy. Sizing and heating need to be figured out, as does the building, but we have always had a helpful partner on our side. She never upsold us on anything we didn't need, and we got some nice freebies when the sauna was delivered. And now we can really enjoy every moment in our garden.
KF
I'm really happy with my sauna purchase. Maya gave above and beyond excellent customer service. She wasn't pushy and gave impressive followup after the delivery to make sure everything was just right.
DE
I enjoy my FD2 Sauna with Red Light, Infrared and radiant heat. Use it 5x a week and my post workout soreness is minimal and sleep great. Maya at Norse Steam was excellent to work with.
B
We purchased the 3-person sauna for our outdoor garden. We chose the cube sauna for the aesthetic and could not be happier.
I assembled by myself except for the 2 large panels (requires a few people). Instructions were good - took me two partial Saturdays to complete and a few hours to unpack and organize in advance of assembly. Had my elec. add a NEMA enclosure on the back for the controller and power for lights and a 2nd panel for the wireless control.
Customer service was excellent
MP
Awesome Sauna and Awesome Company and Experience purchasing it from Maya!
After much research I chose the Finnmark FD-2 and it has met and exceeded all my expectations! Easy to assemble and it functions great - just as advertised. I highly recommend it for home use!
EA
Recently purchased the Finnmark one person after much research. Extremely happy with it and the ordering process. Maya was very responsive and helpful during the process and keeping us updated while we waited for shipment. There were several places I could have ordered this, but i chose Norse Steam based on the communication and customer service which was fantastic. The shipment was also excellent. The setup was pretty seamless for two people - but the best part is the sauna experience 10/10
G
Maya is amazing - super helpful and responsive. Looked at many stores, these guys have the best prices and service. Highly recommend
GR
Norse Steam, and specifically Maya, were extremely helpful as I was making the decision for our Sauna. I was able to get all of the necessary details to make a decision as construction was happening in my backyard to make space for it.
We absolutely love the CL7G. It is extremely comfortable for 6 people (can fit more less comfortably). The Thermory Spruce and Aspen in the interior smells great. The lighting is lovely. We paired the CL7G with the Harvia Spirit 10.5kw.
RS
Had great experience shopping at Norse Steam for the new heater. They had very good deal, with rocks. Customer service was good, and responded very fast with my questions. Received the heater, and it looks good, and the quality seem to be great. Will install soon, and am very excited to start experiencing sauna the way it ment to be
O
positive purchase experience - Harvia Legend 150 SL woodstove
thanks Norse Steam for flawless transaction - I got instant replies on my questions, received competitive price on the wood stove and got it delivered within two weeks!
Can highly recommend Norse Steam for others.
JR
Smoking Hot Tub!
I got the Norse Steam SaunaLife wood-fired hot tub, the S4N model, and its been seriously great. It heats up quicker than I expected, usually around an hour and a half, and once its hot, it stays that way for a good long while. The wood-fired system is simple to use, and honestly kind of fun.
The tub itself feels solid and well put together. The thermo-spruce exterior looks beautiful in person, and the fiberglass interior is smooth, deep, and easy to clean. Its the kind of setup that just works without a bunch of fuss, which I really appreciate.
Also, the team at Norse Steam was genuinely great to work with. Super helpful, quick to respond, and made the process really easy from start to finish. It felt like they actually cared that I was happy with it. The tub has totally become a go-to way to unwind, and I wouldnt change a thing.
S
Maya was so knowledgeable and responsive
Maya was so knowledgeable and responsive. She helped me understand the product options and found a fantastic solution that fit our needs. Her follow through was very helpful and made us comfortable with our decision. We are extremely happy with the end result!
W
Great service
I recently purchased the Harvia Club sauna equipment, and I am thoroughly impressed with both the product and the customer service experience. The heaters robust performance and durable stainless steel construction make it ideal for larger sauna spaces, providing consistent heat and a relaxing environment. Its compatibility with advanced controls ensures a personalized sauna experience every time.
The customer service team was exceptional, prompt, knowledgeable, and helpful throughout the purchase process. They ensured smooth delivery and provided clear guidance on installation and operation. Overall, I highly recommend Harvia Club for anyone seeking premium-quality sauna equipment backed by excellent support!
BT
Great Sauna & Purchase Experience
Great experience purchasing Finnmark FD-2 from Norse Steam. Good communication and easy to assemble. Temperature increases quickly (30 minutes or less to 140) and maintains well. So far this has been a great purchase.
M
Great sauna and great customer service
We purchased the Finnmark SD-1 sauna. Maya was extremely helpful with the purchase. We had an issue with the sauna not reaching the maximum temperature, and Maya connected us with the appropriate technician that explained how to correct the issue. The sauna now heats to the maximum temperature (170 degrees) in less than an hour, and it is a great unit. We are very happy with it, and we would definitely purchase from NorseSteam if we needed any other items.
JK
Sauna Review
I recently purchased a sauna from Norse Steam, and I couldn't be more impressed with the entire experience. From start to finish, their customer service was exceptional, and Maya deserves special recognition for her outstanding support!
Maya was incredibly knowledgeable and patient, answering all my questions about the sauna features, installation process, and maintenance. She went above and beyond to ensure I selected the perfect model for my home. Even after the purchase, Maya followed up to make sure everything was running smoothly and that I was satisfied with my sauna.
The sauna itself is top-notch beautifully designed, durable, and easy to use. It's clear that Norse Steam takes pride in the quality of their products and their commitment to customer satisfaction.
If you're considering a sauna, I wholeheartedly recommend Norse Steam. With their excellent customer service and high-quality products, you're in great hands. Thank you, Maya, and the entire Norse Steam team for a fantastic experience!
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