Furniqro FHSPD108S Whole House Surge Protector for 108,000 Amps, Ultimate Surge Protection, Whole Home Surge Protector for Indoor/Outdoor Use, 120/240V

Why I added this surge protector to my service panel

After a rough season of storms, I wanted a first line of defense for the entire house—something to handle the kind of transient spikes that a plug-in strip can’t catch. I installed the FHSPD108S in my main panel to see how a compact, high-capacity whole-home unit fares in a typical 120/240V split-phase setup. The short version: it’s straightforward to install, takes little space, and offers a lot of capacity on paper for not much fuss.

What this unit is—and isn’t

The FHSPD108S is a Type 2-style whole-home surge protective device designed for 120/240V, 60 Hz systems. It sits at the service panel (or near the service disconnect) and clamps high-energy spikes before they propagate through branch circuits. The enclosure is compact and labeled for indoor or outdoor use, with simple LED indicators to show protection status. It’s compatible with any brand of load center and breakers, which is handy if you’re not married to a single ecosystem.

Like most residential SPDs at this class and price point, it doesn’t offer advanced diagnostics, remote alarm contacts, or field-replaceable modules. It’s a set-it-and-keep-an-eye-on-the-LEDs kind of device—exactly what many homes need as a baseline.

Installation: refreshingly simple

I installed the FHSPD108S on a dedicated two-pole breaker in an existing 200A panel. The process felt familiar:

• Shut off the main, verify no voltage, and remove the dead front.
• Mount the unit outside the panel on a knockout (or on a nearby surface) and route the pigtails cleanly.
• Land the two hot leads on a two-pole breaker, with neutral and ground on their respective bars.
• Keep conductors as short and straight as possible—this matters for clamping performance.
• Restore power and verify the LEDs indicate protection is active.

A few notes from my install:

• Lead length: The unit ships with long pigtails, which provides placement flexibility, but you should trim them down. Excess lead length adds impedance and can degrade performance during a surge event. I kept runs under about 12 inches and avoided tight coils.
• Breaker placement: I used the closest available two-pole space to the service lugs. Being near the main feed reduces wiring impedance and improves response.
• Indoor/outdoor: The enclosure feels robust enough for either. If you’re mounting outdoors, use appropriate fittings, respect drip loops, and follow your local code for weather exposure.
• LEDs: After energizing, the LEDs were bright enough to see with the panel door open, which makes quick visual checks easy.

If you’re not comfortable working inside a live panel—even with the main off, the service lugs are still energized—hire a licensed electrician. Also make sure your grounding electrode system is up to code; no SPD can make up for poor grounding.

Build and design

This unit is compact, with a clean, utilitarian look. The wire gauge is appropriate for its category, and the pigtails are flexible enough to route cleanly without strain. The enclosure is stout and doesn’t feel flimsy. There’s no screen or button to fuss with—just LEDs, which I prefer for a “set and forget” device.

The simplified labeling makes connection obvious. If you’ve installed other SPDs, you’ll be right at home; if you haven’t, the wiring diagram is straightforward. You’ll still want to pay attention to breaker rating, torque specs, and routing, but nothing here feels fussy or proprietary.

Performance in practice

There isn’t a realistic, safe way for me to conjure a direct lightning strike to “test” this device in-situ, and surge events are by nature unpredictable. What I can say is that:

• With proper installation, SPDs like this one are very effective at clamping the common, high-energy spikes caused by utility switching, nearby strikes, and large motor loads cycling on and off.
• The 108,000-amp rating gives comfortable headroom for residential use. Ratings aren’t the whole story, but they’re a useful proxy for capability when your installation fundamentals are solid.
• Day to day, the LEDs are the only “interaction” you’ll have. If a bank sacrifices itself after a severe event, the indicator will alert you, and you’ll know it’s time to replace the unit.

I haven’t seen nuisance tripping or compatibility issues with AFCI/GFCI breakers in my panel. As with any SPD, keeping lead lengths short and ensuring the service bond and grounding system are tight is key to getting the performance you paid for.

How it stacks up

Compared with big-brand residential SPDs (think common 50–100 kA units from the usual electrical names), the FHSPD108S offers:

• A compact footprint that’s easy to position near the main lugs.
• Broad load-center compatibility, avoiding brand lock-in.
• A high surge rating for its size class.

Where it trails pricier models is in advanced features. There’s no audible alarm, no replaceable cartridges, and no remote contacts. If you’re managing a facility that needs remote status or you want modularity for faster field service, you’ll want to look higher upmarket. For a typical single-family home where you just want robust protection and a simple status check, this is right in the sweet spot.

Practical tips for getting the most out of it

• Keep the leads short and straight. Trim the pigtails and avoid loops; if you can, twist the two hot conductors together on the way to the breaker to slightly reduce inductance.
• Use a nearby two-pole breaker. The closer you are to the service feed, the better.
• Verify grounding. Ensure your ground and neutral bars are correctly bonded at service only, and that your grounding electrode system (rods, clamp, water bond where applicable) is sound.
• Label it. Add a panel label so anyone working in the panel knows there’s an SPD installed.
• Pair it with point-of-use protection. A whole-home unit is the first line; sensitive electronics still benefit from quality plug-in protectors with proper UL listings.

Reliability and maintenance

The unit’s maintenance is minimal: periodic visual checks of the LEDs. After major storms, I take a quick look; if a light goes out, consider the module compromised and schedule a replacement. This is a wear item by design—SPDs absorb surges over time—so planning to replace it at end-of-life, or after a known severe event, is prudent.

Because the device’s effectiveness depends so much on installation quality, I appreciate that the documentation emphasizes proper grounding and installer familiarity. If you’re using a pro, make sure they’re comfortable with surge protective devices and NEC requirements for SPD placement.

The bottom line

The FHSPD108S is a practical, compact whole-home surge protector that’s easy to live with. It installs cleanly, plays well with a variety of panels, and offers a comfortable surge rating for residential service. The lack of bells and whistles is arguably a strength here: fewer things to configure, fewer points of failure, and a clear visual status.

Would I like to see more diagnostics or a published third-party listing front and center in the spec sheet? Sure. But judged on the fundamentals—capacity, compatibility, installation, and day-to-day experience—it checks the right boxes for a house that needs solid, first-stage surge protection.

Recommendation: I recommend the FHSPD108S for homeowners and electricians looking for a straightforward, high-capacity whole-house SPD with broad compatibility and a small footprint. It’s easy to install correctly, provides a meaningful layer of protection against everyday surges, and keeps monitoring simple. Just pair it with good grounding and quality point-of-use protectors for sensitive electronics, and it’s a strong value in a whole-home protection strategy.