Most facility managers comparing the Philips HeartStart FRx and ZOLL AED Plus pick the wrong device for one reason: they buy on sticker price, not on rescue physics. The FRx costs $1,944 retail, and the AED Plus costs $2,021 — a $77 gap. The 5-year ownership cost gap is closer to $400, and the rescue-performance gap is larger than the price gap on every metric except weight.
The honest answer to “which one wins” depends on whether children may be present and whether the rescuer will receive real-time CPR coaching. Both devices hold current FDA 510(k) clearance (Philips K043002, ZOLL P020011), and EMS agencies deploy both. Both are rated for lay-bystander use under all 50-state Good Samaritan protections (AHA).
Quick answerThe FRx wins for schools, daycares, and any mixed adult-and-child facility — the Infant/Child Key is the cleanest pediatric workflow in the AED market. The AED Plus wins for gyms, athletic facilities, trained-team workplaces, and outdoor deployments — Real CPR Help® feedback shows measurable improvements in compression depth on adult patients, and the 5-year CPR-D-padz cuts consumable costs by roughly 60% over 5 years.
Head-to-head spec comparison
| Spec | Philips HeartStart FRx | ZOLL AED Plus |
|---|---|---|
| Retail price (2026) | $1,944 | $1,799 |
| FDA 510(k) # | K043002 | P020011 |
| Pad shelf life | 2 years (SMART Pads II) | 5 years (CPR-D-padz) |
| Battery life | 4 years | 5 years |
| Pad replacement cost | ~$60 | ~$130 |
| CPR feedback | Voice + metronome only | Real CPR Help® — depth + rate |
| Pediatric mode | Infant/Child Key (cleanest workflow) | Pedi-padz II (separate pad set) |
| IP rating | IP55 | IP55 |
| Weight | 3.5 lb / 1.6 kg | 6.7 lb / 3.1 kg |
| Warranty | 8 years | 7 years |
| 5-year total ownership cost | $2,200–$2,800 | $2,000–$2,400 |
The pediatric decision decides the buyer
For schools, daycares, family fitness centers, and any facility serving children under 8 or under 55 lbs, pediatric capability is non-negotiable per American Red Cross and American Academy of Pediatrics guidance.
The FRx workflow is one step: insert the Infant/Child Key into the device, and the FRx automatically reduces shock energy to pediatric levels. No separate pad cartridge to track. No swapping pad packages mid-rescue. The AED Plus uses Pedi-padz II — a separate pad set that must be physically swapped on the device. Under stress, swap workflows fail more often than key workflows.
For a 60,000 sq ft K-12 school with 4 AEDs and 6 staff sharing pediatric training responsibility, the FRx removes one failure point. That’s why our school AED guide ranks the FRx as the standard pick for K-12.
The CPR feedback decision decides the rescue
The AHA 2020 Resuscitation Guidelines explicitly endorse real-time CPR feedback devices as improving compression depth and rate quality during cardiac arrest events. ZOLL’s Real CPR Help® uses an accelerometer in the CPR-D-padz to measure compression depth in real time and prompt the rescuer audibly (“Push harder” / “Good compressions”).
The FRx provides a metronome — useful for rate, useless for depth. For an untrained rescuer working on a muscular adult patient (gym member, athletic injury, construction worker), depth coaching closes a measurable gap that voice prompts alone cannot. Sudden cardiac death is up to 17× more likely during vigorous exertion in habitually inactive individuals (NEJM 2000, Albert CM et al.) — the population most likely to need depth coaching is the same population most likely to receive a rescue at a gym.
5-year total cost flips the price advantage
The FRx’s $77 retail advantage disappears in year 3. Standard FRx pads expire every 2 years at $60 per replacement — that’s 2 pad replacements over 5 years ($120). Battery replacement runs ~$100 every 4 years ($100 over 5 years). Add a $149 cabinet, and the program totals roughly $2,313 over 5 years.
The AED Plus uses ZOLL’s CPR-D-padz, which carry a 5-year shelf life — the longest in the AED industry. Over 5 years: zero pad replacements unless used in a rescue. The battery is rated for 5 years. Add a $149 cabinet, and the AED Plus program totals roughly $2,170 over 5 years.
Real-world deployment scenarios
Scenario A — 8,000 sq ft elementary school, 1 AED
K-12 facility, ~400 students, 30 staff, gym + cafeteria. Pediatric capability required. Staff turnover ~20% annually so training continuity is moderate. Recommendation: Philips HeartStart FRx with Infant/Child Key. Lower failure rate during pediatric activation, lighter unit (3.5 lb vs 6.7 lb) for hallway transport, 8-year warranty covers the typical school capital-equipment depreciation cycle.
Scenario B — 12,000 sq ft commercial gym, 1 AED + future fleet expansion
Adults only. Trained staff (3 personal trainers + 2 front desk). Pool deck onsite. Recommendation: ZOLL AED Plus with CPR-D-padz. CPR feedback on muscular adult patients is the highest-impact feature for this population. 5-year pad life cuts maintenance overhead. IP55 supports pool-adjacent humidity.
Pros and cons
Philips FRx wins on
- Pediatric Infant/Child Key — cleanest in the industry
- 3.5 lb weight — easier to retrieve and carry
- 8-year warranty (longest in tier-A class)
- Lower retail price by $77
- Familiar to school + facility teams (largest school install base)
AED Plus wins on
- Real CPR Help® depth coaching
- 5-year pad shelf life vs FRx’s 2 years
- 5-year battery vs FRx’s 4 years
- ~60% lower consumables labor over 5 years
- Lower 5-year total ownership cost ($143 less)
Verdict by use case
Schools · Daycares · Family Fitness
Philips HeartStart FRx
The Infant/Child Key + 3.5 lb weight + 8-year warranty matches the operating realities of a K-12 or family-facing facility. Read the full FRx review →
Gyms · Athletic Facilities · Trained Teams · Outdoor
ZOLL AED Plus
Real CPR Help® on adult patients is genuinely better. 5-year consumables cut a major maintenance pain point. The price difference pays back in year 3. Read the full AED Plus review →
Frequently asked questions
Which is cheaper to own over 5 years — FRx or AED Plus?
The AED Plus is roughly $143. Five-year pad life on CPR-D-padz means zero pad replacements vs two on the FRx (at $60 each), and the battery cycle is 5 years vs FRx’s 4 years.
Can the FRx be used on children without the Child Key?
No. The Infant/Child Key reduces shock energy to pediatric levels. Without it, the FRx delivers adult-level shock energy. For any facility serving children under 8, the Child Key must be installed at all times.
Does the AED Plus need separate pediatric pads?
Yes. Pedi-padz II must be physically swapped onto the device for pediatric use. This is a slower workflow than the FRx’s Child Key.
Which AED is approved for outdoor use?
Both. Both carry IP55 ratings (jet water resistance). Both ship with optional carry cases. For sustained outdoor weather exposure, HeartSine 360P (IP56) is a better choice.
Are both FDA-cleared as of 2026?
Yes. The FRx is cleared under K043002. The AED Plus is cleared under P020011. Verify current status in the FDA 510(k) database before any purchase.
Which one is recommended by the AED Best Brands editorial team?
The FRx is the 2026 Best Overall Editor’s Pick because it serves the widest population (mixed adult + pediatric environments). The AED Plus is the 2026 Best CPR Feedback pick because it provides a measurable rescue performance edge on adult patients.
How to decide in 60 seconds
- Will children under 8 ever be present? → Yes: FRx. No: continue.
- Will rescuers be trained or untrained? → Trained: AED Plus. Untrained: continue.
- Is the facility high-SCA-risk (gym, athletic)? → Yes: AED Plus. No: FRx.
- Single-AED program or 5+ unit fleet? → Single: FRx. Fleet: AED Plus (5-year consumables math wins at scale).
Run the math for your specific facility
Get the 60-second AED recommendation matched to your environment, training level, and budget. Free, no email required.
Sources
- American Heart Association — CPR + AED guidance
- NEJM 2000 — Albert CM et al., vigorous exertion + SCA (17× risk)
- American Red Cross — Pediatric AED guidance
- FDA 510(k) clearance database
- Philips Healthcare — HeartStart FRx 861304 product documentation
- ZOLL Medical Corporation — AED Plus CPR-D-padz product documentation
Educational comparison. Pricing reflects 2026 authorized US distributor reference points and varies by vendor + bundle. Specs are accurate as of publication date and may change with manufacturer firmware updates. Not medical or compliance advice. If you are witnessing a medical emergency, call 911 immediately.
