Skip to content
Independent·Affiliate-disclosed·Spec-verified·Prices verified and dated
Home / Compare
Head-to-head buyer guide

Inergize Health Spire Apex vs Renu Therapy Cold Stoic 2.0

Specs, prices, editor verdict, and who should buy which, compared side by side.

By Ryan · Founder
Updated Sep 30, 2026

Lifespan Vault earns an affiliate commission when you buy through links on this page, at no extra cost to you. It does not change our rankings or our verdicts.

Quick verdict

Inergize Health Spire Apex (premium, $9,490) vs Renu Therapy Cold Stoic 2.0 (ultra premium, $9,499 to $10,019). Different tools for different jobs (see the per-product details below).

Compared on 8 shared specs · same category (cold plunge).

Inergize Spire Apex cedar and stainless steel cold plunge with reclined seat
Inergize Health

Spire Apex

Inergize's new flagship pairs the Spire's cedar-and-stainless shell with a 1HP chiller whose Ice-Making Mode the brand rates to 32°F.

PRICE
$9,490
View at Inergize Health →
Renu Therapy Cold Stoic 2.0 cold plunge
Renu Therapy

Cold Stoic 2.0

A horizontal plunge that chills to a manufacturer-stated 39°F and holds it forever - the closest production unit to a custom onsen.

PRICE
$9,499 to $10,019
SCORE
9.1 / 10
View at Renu Therapy →
The verdict

We have not scored these two head to head, so this page does not name a winner. The Inergize Health Spire Apex starts at $9,490 and the Renu Therapy Cold Stoic 2.0 at $9,499. The per-buyer recommendations below say who each one suits.

Side-by-side specs

SpecInergize Health Spire ApexRenu Therapy Cold Stoic 2.0
price$9,490$9,499 to $10,019
coolingchiller (1HP, manufacturer-stated 32°F floor)chiller
min temp f3239
capacity1-person (reclined seat)1-person
dimensions39.5″ × 28.7″ × 43.76″ (exterior)70″ × 33″ × 35″
water gallons~90 (per product page)95
power120V / 60Hz / 20A grounded circuit, 1,150W120V / 15A
construction316 marine-grade stainless steel + thermotreated red cedarplastic tub (Renu warranty class); breath deck in California Redwood, Pacific Cedar, Black Plastic or Brown Plastic
tub warranty months1260

Inergize Health Spire Apex also publishes: heating, max temp f, interior dimensions, seat height, weight empty lb, weight full lb, cooling rate, cooling capacity, ozone mg per hour, flow rate gph, noise DB, weather rating, lead time weeks

Renu Therapy Cold Stoic 2.0 also publishes: weight lb, chiller warranty months

Who should buy which

Pick the Inergize Health Spire Apex if

Buyers who want the coldest manufacturer-rated floor available in a cedar-and-stainless tub at this price, and who can wait out a 16-week preorder.

Skip if

You need delivery soon, you buy on warranty depth (Renu's 60-month tub coverage vs 12 here), or you can't run a dedicated 120V/20A circuit.

Pick the Renu Therapy Cold Stoic 2.0 if

Premium-aesthetics buyers who want the longest warranty in the category and a tub that reads as architecture.

Skip if

You're budget-constrained, want apartment-friendly install, or don't care about premium materials.

Go deeper

FULL REVIEW
Read the Inergize Health Spire Apex review →
FULL REVIEW
Read the Renu Therapy Cold Stoic 2.0 review →

Frequently asked

Which is better, the Inergize Health Spire Apex or the Renu Therapy Cold Stoic 2.0?

We have not scored these two head to head, so this page does not name a winner. The Inergize Health Spire Apex starts at $9,490 and the Renu Therapy Cold Stoic 2.0 at $9,499. The per-buyer recommendations below say who each one suits.

How much do they cost?

Inergize Health Spire Apex: $9,490. Renu Therapy Cold Stoic 2.0: $9,499 to $10,019. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

Inergize Health Spire Apex: Buyers who want the coldest manufacturer-rated floor available in a cedar-and-stainless tub at this price, and who can wait out a 16-week preorder. Renu Therapy Cold Stoic 2.0: Premium-aesthetics buyers who want the longest warranty in the category and a tub that reads as architecture.

Continue researching
Buyer guide
Best Cold Plunges
Chillers and tubs compared: Plunge vs Renu vs Ice Barrel.
Free guide · Weekly drop

The Longevity Gear Buyer's Checklist

The specs that actually decide whether a sauna, cold plunge, red light panel, or smart ring is worth it, plus the real price range for each. Get the free PDF, plus one weekly email on the gear worth buying.

If you purchase an independently reviewed product or service through a link on our website, Lifespan Vault may receive an affiliate commission.