Let’s Talk About Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12
The Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12 isn’t exactly the kind of tactical gear I typically review, but having dealt with enough off-grid cabins and remote hunting lodges, I know the importance of a reliable and properly installed furnace. This flue assembly from Intertherm is designed to vent exhaust gasses and supply fresh air to furnaces in mobile homes and manufactured housing. Its adjustable length and specific roof pitch make it a niche but vital piece of equipment for maintaining a safe and efficient heating system.
My need for this type of product stemmed from a consulting gig I took on to help upgrade the heating system of a hunting cabin. The existing flue was corroded and poorly installed, leading to concerns about carbon monoxide. I was specifically looking for a replacement that could handle the 4/12 roof pitch of the cabin and offer some flexibility in height adjustment to ensure proper draft.
Upon unboxing the Intertherm 903665A, I was immediately struck by the sturdiness of the materials. The metal felt thick and durable, and the overall construction seemed robust. The adjustable sections moved smoothly, suggesting a good level of precision in the manufacturing process.
Compared to some generic flue kits I’ve seen, the Intertherm assembly felt significantly more substantial. Generic kits often use thinner gauge metal and lack the specific 4/12 slant, making them unsuitable for many installations. I ultimately chose the Intertherm because of its known brand reputation and the specific match for the required roof pitch.
My first impression was one of cautious optimism. It looked like a well-made piece of equipment, but the proof would be in the installation and performance. I was excited to see if it could solve the issues we were experiencing at the cabin.
Real-World Testing: Putting Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12 to the Test
First Use Experience
The initial test took place at the aforementioned hunting cabin, nestled in the rugged terrain of the Appalachian Mountains. Installation was straightforward, although you’ll want a good understanding of roofing and flue systems. The adjustable length was extremely helpful in achieving the correct height for optimal draft, especially considering the varying snow loads common in that area.
The assembly was tested in cold, windy conditions, representative of typical winter weather in the mountains. Performance was immediately noticeable; the furnace drafted much more efficiently, and there was no backdraft or noticeable leakage. Ease of use during installation was a big plus.
One initial surprise was how well the flue blended with the existing roof. The design wasn’t obtrusive and didn’t detract from the overall aesthetic of the cabin. No issues were experienced during the first firing of the furnace.
Extended Use & Reliability
After a full heating season, the Intertherm 903665A has held up remarkably well. There are no signs of rust or corrosion, even after exposure to harsh winter conditions. The adjustable sections remain secure and haven’t loosened over time.
Durability has been exceptional; the heavy-gauge metal has withstood heavy snow loads and strong winds without any deformation. Maintenance has been minimal, mainly consisting of visual inspections for debris buildup. Cleaning the flue annually is also recommended for optimal performance.
Compared to the previous, inadequate flue system, the Intertherm assembly has been a significant upgrade. It outperforms the old system in every aspect, providing better draft, increased safety, and improved energy efficiency. It has given me peace of mind knowing that the heating system is operating safely and reliably.
Breaking Down the Features of Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12
Specifications
- The Intertherm 903665A Roof Jacks Flue Assy is specifically designed for use with Intertherm M1 Series Hot Surface Ignition Furnaces, M1 Series Gas Gun Furnaces, and M5 Series Oil Gun Furnaces. Always check manufacturer recommendations for compatibility with other models.
- It features an adjustable extension range of 35″ to 63″. This provides flexibility in achieving the correct height above the roofline for proper draft.
- The assembly is designed with a 4/12 slant (pitch). This is crucial for proper alignment with roofs of this particular slope.
- The primary function is to provide fresh air for combustion and vent flue gasses. This ensures safe and efficient furnace operation.
- It’s constructed from durable metal. This is vital for withstanding harsh weather conditions and resisting corrosion.
These specifications matter because they directly impact the safety and efficiency of the heating system. The correct roof pitch ensures proper venting, while the adjustable length allows for optimal draft. Durable materials guarantee longevity and reliable performance.
Performance & Functionality
The Intertherm 903665A excels at its job, providing reliable venting and fresh air intake for the furnace. The 4/12 pitch is precise, and the adjustable length makes installation much easier than with fixed-length flues.
A key strength is its ability to maintain a consistent draft, even in windy conditions. A potential area for improvement might be a more detailed installation guide included with the assembly. Overall, the performance meets and exceeds expectations for a flue assembly in this class.
Design & Ergonomics
The build quality is excellent. The materials feel substantial and well-constructed.
The design is utilitarian but functional. There is a slight learning curve for those unfamiliar with flue system installation, but it is not overly complicated.
Durability & Maintenance
The Intertherm 903665A is built to last. The heavy-gauge metal should provide years of reliable service.
Maintenance is straightforward, primarily involving visual inspections and occasional cleaning to remove debris. Regular cleaning will ensure optimal performance and prolong the life of the flue.
Accessories and Customization Options
The Intertherm 903665A comes as a complete assembly, including the roof jack and adjustable flue sections. There aren’t many customization options available for this type of product.
While the Intertherm assembly is designed for use with specific Intertherm furnaces, it may be compatible with similar sized vent pipes from other brands. Always consult with a qualified HVAC technician to ensure compatibility before making any modifications.
Pros and Cons of Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12
Pros
- Adjustable length (35″ – 63″) for flexible installation.
- Precise 4/12 slant for accurate roof alignment.
- Durable construction for long-lasting performance.
- Ensures proper draft and safe venting of flue gasses.
- Easy installation (for experienced installers).
Cons
- Price is relatively high compared to generic flue kits.
- Limited compatibility; primarily designed for Intertherm furnaces.
- Installation requires some experience with roofing and HVAC systems.
Who Should Buy Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12?
The Intertherm 903665A Roof Jacks Flue Assy is perfect for homeowners with mobile homes or manufactured housing utilizing Intertherm M1 or M5 series furnaces. It’s also ideal for HVAC technicians seeking a reliable and properly sized flue assembly for these applications.
Those without experience in roofing or HVAC installation should skip this product and seek professional installation. Attempting to install it without proper knowledge could lead to safety hazards.
A must-have accessory is a high-quality roof sealant to ensure a watertight seal around the roof jack. Additionally, carbon monoxide detectors are essential for any home with a fuel-burning furnace.
Conclusion on Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12
The Intertherm 903665A Roof Jacks Flue Assy 35″ 63″ Slant 4/12 is a well-built and reliable component that is essential for safe and efficient furnace operation. While the price is higher than generic alternatives, the quality and specific design features justify the cost.
The adjustable length and precise 4/12 slant make installation easier and ensure proper venting. The durable construction provides peace of mind, knowing that the system will perform reliably for years to come.
I would personally recommend this product to anyone needing to replace a flue assembly on a compatible Intertherm furnace. Don’t compromise on safety; invest in a quality component like the Intertherm 903665A. Ensure the safety and efficiency of your heating system today; get the right flue for the job!