DuraVent FasNSeal – Horizontal Unit Heater Vent Kit

$455.11

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3” - FSCMKI03B (+$0)
4” - FSCMKI04B (+$34.23)
4” w/ condensate drain - FSCMKI04CDB (+$160.83)
Product price: $455.11
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SKU: FSCMKI03B Categories: , , Brand:

DuraVent FasNSeal Horizontal Unit Heater Vent Kit: four parts for a vent that exits through a wall

The DuraVent FasNSeal Horizontal Unit Heater Vent Kit is a set of four venting parts for a mid efficiency gas unit heater, the hanging heater found in a garage, shop, or warehouse. This kit takes exhaust sideways through a wall, not up through a roof. It includes an adapter to connect to the heater, an insulated sleeve for the wall opening, a 36 inch straight pipe, and a tee that finishes the vent outside. FasNSeal is DuraVent’s stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, built to carry pressurized exhaust and its acidic condensate outside.

Choose 3 inch, 4 inch, or 4 inch with a drain built into the heater adapter. Unless the heater has its own drain, a FasNSeal drain belongs as close to it as possible. The horizontal pipe rises at least 1/4 inch per foot away from the heater so liquid flows back toward the drain. A gasket and built in locking band seal each vent joint. Want a closer look at the outside end? See the DuraVent FasNSeal Termination Tee wall ending. The DuraVent FasNSeal Horizontal Unit Heater Vent Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

Details

SKU: FSCMKI03B | FSCMKI04B | FSCMKI04CDB

Applications

FasNSeal is for use with natural gas or propane Categories II, III and IV appliances or Canada’s Type BH Gas Vent Systems, having a maximum rated operating temperature of 480°F and a maximum positive pressure of 15″ (FasNSeal Flex 6″) water column. FasNSeal can be used on a wide range of applications, including: high efficiency gas boilers, furnaces, booster heaters, pool heaters, water heaters, unit heaters, or tankless water heaters.

Materials and Construction

3″–7″: 29-4C or 316L stainless steel .016″

8″–12″: 29-4C or 316L stainless steel .019″

14″–16″: 29-4C or 316L stainless steel .024″

Diameters

3″ – 4″

Listings

UL Listed to UL 1738 and ULC S636.

Instructions

Typical Installation

Refer to our Typical Venting Installation drawings to select the appropriate component parts for your installation.

FasNSeal

More Typical Installations

FasNSeal installation

Installation Key

1 Rain Cap
2 Storm Collar
3 Variable Pitch Roof Flashing
4 Vent Length
5 Adjustable Vent Length
6 Firestop/Flat Flashing
7 Horizontal Drip Tee
8 Elbow
9 Universal Condensate Drain
10 Appliance Adapter
11 Top Plate*
12 Male Flex Adaptere
13 FasNSeal Flex
14 Female Flex Adapter
15 Standard Tee

Commercial Applications

Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:

  • Engineering Services: Personalized system design services offer comprehensive CAD submittal drawing and complete bills of materials.
  • Custom Parts: If your project requires innovative solutions, contact Duravent for custom parts that meet your specific project needs.
  • FasNSeal W2: FasNSeal W2 is the ideal choice for commercial applications where there is a need for low clearances to combustibles.
  • Up to 16” Vent Diameters: Many commercial applications require large diameter systems due to the units size and output. Large diameters are available in single and double wall, featuring FasNSeal’s triple lipped directional gaskets and built-in locking band which provides a safe and convenient installation.

Product Resources

Catalogs

Submittals

Bulletins

Brochures

Spec Sheets

Educational Papers

FAQ

What is in the FasNSeal Horizontal Unit Heater Vent Kit?

A Universal Unit Heater Appliance Adapter, an Insulated Wall Pass Through, a 36-inch straight length and a Termination Tee, the parts to vent a mid-efficiency unit heater horizontally through a wall. The FSCMK04CDB version uses an appliance adapter with an integrated condensate drain. Choose 3 or 4 inch on the selector to match the heater’s flue collar.

Which unit heaters can use it?

Gas-fired unit heaters in Categories II, III or IV (or Type BH in Canada) that are listed for a special gas vent and rated within FasNSeal’s 480 F and 15 inches water column limits; mid-efficiency, positive-pressure units are the typical match. The heater manual gives the vent size, the maximum horizontal run and the termination clearances.

Do I need the version with the condensate drain?

If the heater has no internal condensate drain, DuraVent strongly recommends a drain as close to the flue collar as possible, which is what the CDB adapter provides; a drain is also required for every 30 feet of horizontal run. Form a trapped loop in the drain tubing, secure it with a cable tie and dispose of the acidic condensate per local code.

How should the horizontal run be sloped and supported?

Pitch it at least 1/4 inch per foot back toward the heater so condensate drains and keep the seams on the vent lengths facing up. Support the run with hanger straps, join sections with the built-in gasket and locking band tightened snug plus a quarter turn, and pass the wall with the insulated pass-through from the kit.

What clearance to combustibles applies?

Per the FasNSeal manual’s Table 2 by rated temperature: for a 3 or 4 inch single-wall vent rated 300 F an unenclosed horizontal run needs 4 inches of clearance, more if enclosed, and the clearance space must never be filled with insulation. Extra lengths, elbows and drains are in the FasNSeal category.

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

Please follow these very important steps when it comes to Freight Items that are damaged or missing
  • 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

Please follow these very important steps when Returning Items. Contact our team.
  • 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.

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