The right components make the difference between a high-performing outdoor heating system and another struggling to maintain efficiency; and as such, outdoor wood boiler systems are no exceptions. In the outdoor boiler systems, PEX stands out as one of the most important components. However, do you know what PEX means? And why is this material so much popular and so much needed in the hydronic outdoor heating world?
This article discusses PEX in detail, telling you what it is, its benefits, applications of PEX, and reasons why it is a first choice in outdoor heating solutions.
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What Does PEX Stand For?
PEX can be defined as Cross-Linked Polyethylene. As explained in this article, The cross-linked polyethylene is a plastic pipe that changes its form by cross-linking processing, which will improve the performance characteristics. It would change the molecular structure of polyethylene, thus making it more potent, durable, flexible, and temperature resistant.
There are three types of PEX, classified according to their manufacturing procedures, which are:
- PEX-A: Produced via the peroxide method, this version is the most supple and kink-resistant.
- PEX-B: They’re made through the silane method working pretty well, and also proved to be a really affordable means.
- PEX-C: Formed through electron beam major method, a little more rigid, but does its job for specific applications.
Although all three types are used in plumbing systems and heating systems, PEX-A and PEX-B are widely acceptable for outdoor heating applications due to their vertical flexibility with thermal performance.
Why PEX Is Ideal for Outdoor Heating Systems
Outdoor wood boilers work by heating water in an outdoor unit, then pushing it through a closed-loop hydronic system into your home or any other structure. Wetting is a big deal for PEX tubing in such systems:
Withstands Extreme Temperatures
PEX withstands the very high temperatures generated in outdoor wood boilers which makes it the preferred material for hot water transfer.
Freeze and Burst Resistant
PEX is flexible enough to allow for some expansion if water should happen to freeze inside, thereby alleviating the possibility of burst piping-a very important consideration in regions with cold climate.
Strong and Long Lasting
Pex tubing has a long life, as it is resistant to corrosion, scaling, and pitting, although it is also not susceptible to damage by aggressive water conditions.
Easy to Work With
Pex tubing itself is lightweight and much easier to work with over long distances and in trenching than rigid metal or PVC pipes would be.
Energy Efficient
When used with proper insulation, PEX minimizes heat loss, thus lowering fuel consumption and creating more stable indoor temperatures.
Oxygen Barrier vs. Non-Oxygen Barrier PEX
There is a significant difference, which you must understand, before making the choice about PEX tubing that is required by your system being oxygen barrier or non-oxygen barrier PEX.
- Oxygen Barrier PEX: The oxygen barrier type is recommended for closed heating systems, for example, outdoors boiler attaching. The oxygen barrier will, therefore, prevent entering oxygen into the system, protecting metallic parts from rust and corrosion.
- Non-Oxygen Barrier PEX: Only for drinking water systems and should not be used in heating systems with metal components because it allows easier entry of oxygen which produces very hectic conditions for corroding metallic parts.
OutdoorBoiler.com has PEX tubing specifically designed for the outdoor boiler system with a longer lifespan oxygen barrier that the whole heating system is going to enjoy. Check them out on the PEX page.
Insulated PEX: The Gold Standard for Outdoor Applications
Outdoor applications are provided with another protection barrier that is added to these insulated PEX tubes; this type of PEX is engineered to have extra insulation layers for reducing heat loss and protecting against underground conditions.
The insulation typically comprises:
- closed cell foam layer for thermal resistance
- an outer jacket resistant to moisture and soil
- high-quality PEX tube with an oxygen barrier at the center.
With the addition of insulated PEX, the heat losses occurring during the passage of water from the boiler to your home are minimized to the maximum, leading your heating system a bit closer to ann efficiency.
Installation Considerations
In terms of installing PEX for an outdoor boiler system, here are some excellent practices:
- Trenching: The tubing must follow the frost line so that it does not freeze. That depth varies by region.
- Slope and Drainage: Trough cuts into the ground to have a slight slope, so water doesn’t pool around the tubing.
- Backfilling: Backfill with soft soils or silt and sand around the tubing as punctures cause damage and freeze-thaw cycling.
- Protective Conduit: Sometimes, a PVC conduit is installed to house tubing for extra protection under the floor.
- Right Dimensioning: Use proper diameter tubing, which corresponds to the flow requirement of your heating system.
Consult experts at OutdoorBoiler.com and ensure a safe and suitable installation. Reach them through their Contact us page for personalized support.
Maintenance and Longevity
Mostly, PEX tubing demands no maintenance and therefore you need to check your outdoor boiler system periodically for any sign of wear, leakage, or insulation damage. The expected lifespan of PEX piping ranges from 25 years to 50 years if it has been properly installed and applied with good materials like those from OutdoorBoiler.com.
The oxygen barrier and the heavy-duty design greatly reduce scaling, rusting, and other types of trouble that usually plague metal piping systems. Under the majority of the instances, maintenance work will deal with boiler and pumps rather than PEX lines.
Common Questions About PEX in Outdoor Heating
1. Is PEX Safe To Use Underground?
Yes, PEX has been approved for underground applications, but it is strongly recommended to use insulated PEX to prevent heat loss and physical damage.
2. Can PEX freeze?
PEX will not freeze as typically as rigid piping, but that doesn’t mean it won’t freeze. Always bury it below the frost line and insulate it properly.
3. What size PEX do I need for my outdoor boiler?
Most common sizes for outdoor boilers are 1-inch or 1.25-inch diameter. The size will depend on the heating load and how far it is.
4. How far can I run PEX tubing from my boiler to my home?
PEX can have a run of up to 300 feet or even more, but it must be properly sized and insulated for the long-distance run.
Conclusion: Why PEX Is a Smart Investment for Outdoor Heating
When it comes to hydronic outdoor heating systems, PEX tubing is not only a convenient option but a wise, long-term investment. Its flexibility, durability, temperature resistance, and easy installation make it ideally suited for the demands of outdoor boiler installations.
By using PEX with an oxygen barrier, you ensure that your system is not vulnerable to corrosion, while insulated PEX prevents costly heat loss—two of the many features that greatly enhance efficiency and longevity. At OutdoorBoiler.com, products are designed with performance and reliability to maximize homeowners’ benefit from their heating systems.
Whether you are installing a new outdoor boiler or upgrading an old system, one of the most crucial decisions you will make is selecting the right variety of PEX tubing. The experts at OutdoorBoiler.com offer a comprehensive range of premium PEX products, technical assistance, and personal guidance throughout each step of the way.
Do not accept anything less than comfort and heating efficiency. Head to the PEX section of OutdoorBoiler.com to check out your options, and contact us via the Contact Page for advice specific to your needs. Go high-performance PEX!” You will notice the difference this heating season!
Lois Lane is a professional blogger and a seasoned Content writer for wellhousekeeping.com. With a passion for simplifying complex Home Decor topics, he provides valuable insights to a diverse online audience. With four years of experience, Lois has polished his skills as a professional blogger.
