System Installation

A radon system is simple in principle and easy to do badly. A pipe that sags, a fan bolted in a bedroom closet, an unsealed sump pit (the hole in the basement floor where a pump removes groundwater), or a vent that dumps exhaust under a window will all pass a quick glance and fail the house. This page is about the craft. It covers where the pipe goes, how the fan is chosen and mounted, what gets sealed, and what we leave behind.

Where the pipe goes

Exterior route

The most common choice in York County. The pipe exits through the rim joist (the wooden band where the house frame sits on the foundation) or foundation wall, runs up a side or rear wall, and the fan mounts outside at about waist height. It is the least invasive route and the easiest to service. We pick the wall that keeps it out of the main view of the house, keep the run plumb, and can supply pipe painted to match the siding.

Interior route

For homeowners who want nothing visible outside, the pipe can rise through a closet, a garage, or a utility chase into the attic, where the fan lives, and vent through the roof. It costs more and takes longer, and it is the cleanest-looking result there is.

What we weigh

The shortest sensible run, how the house looks from the street, freeze exposure on north walls, distance from windows and doors, and where the fan can sit without being heard. We talk this through with you before a single hole is drilled.

The fan

Fans are sized to your slab and soil, not picked off a shelf. Tight clay soil under a large slab needs more suction, while gravel under a small slab needs less airflow and a quieter unit. We use sealed, weather-rated inline fans built for continuous duty. By standard the fan is never mounted in or below living space, so that any leak on the pressure side of the fan exhausts outside the house. Outdoors or in the attic, it runs at about the volume of a refrigerator.

Sealing and the details

• Slab collar. The suction point (the hole where the pipe draws from the soil) is sealed with a poured or gasketed collar so the fan pulls from the soil, not the basement.
• Sump lid. An airtight, clear lid you can still see and service through, with grommets for the pump cord and discharge.
• Cracks and joints. Major floor cracks and the floor-wall joint sealed where they matter.
• Crawlspace membrane. Heavy sheeting sealed to the walls and piers when there is exposed soil.
• Firestops and labels. Holes through floors and ceilings are sealed with fire-rated material, and the system is labeled with the install date and our number.

Electrical

The fan needs a dedicated outlet or a short new circuit with a disconnect within reach of the unit. Where a new circuit is required we coordinate a licensed electrician so the work is permitted and inspected, and the cost is on your written estimate before we start.

The gauge

Every system gets a U-tube manometer, a simple fluid gauge, on the pipe. Two columns of colored fluid sit level when the fan is off and offset when it is pulling. Glance at it once a month. If the columns are level, call us. We can also add an audible or app-connected alarm if you would rather not remember to look.

Standards we follow

Installations follow the ASTM E2121 standard for radon mitigation in existing homes. Every technician is trained and certified for radon mitigation and holds the certification Pennsylvania requires to test or fix radon in a home. Where a municipality requires a permit for the electrical or the penetration, we pull it.

Maintenance and lifespan

There is nothing to oil or clean. Check the gauge monthly, retest every two years, and expect the fan to run ten years or more before it needs replacing. When it does, it is a bolt-on swap and we stock the common models.

What we leave behind

A running system, a sealed slab, a labeled fan and gauge, floors and finishes as we found them, and a folder with the diagram, the fan model, the warranty, and your post-mitigation result. A few days after the install we return to place the follow-up monitor, and you get the new number in writing. Read about how mitigation works.

Common questions about installation

How long does it take?

Usually one working day. Interior routes and mixed foundations can run into a second.

Can you fix a system someone else installed?

Yes. We diagnose, reseal, re-route, or replace fans on existing systems, and we test afterward to prove the change worked.

Do I have to be home?

For the start and the walk-through at the end, yes. In between you are welcome to go about your day.