Hot Tub Buying Guide: Types, Features, Installation & Costs

Types of Hot Tubs

Acrylic (Hard-Shell)

The standard permanent hot tub. Molded acrylic shell on an insulated frame. Available in 2–8 person configurations. Multiple jet types and configurations. Built-in lighting, waterfalls, and Bluetooth audio. The most durable and feature-rich option. 15–20+ year lifespan.

Cost: $4,000–$8,000 (entry-level). $8,000–$15,000 (mid-range). $15,000–$20,000+ (premium).

Inflatable

Portable, inflatable tubs that plug into a standard 120V outlet. Quick setup (under 1 hour). Air jets (not hydrotherapy jets). Limited heating power and insulation. Good for renters, budget shoppers, or trying before committing to a hard-shell spa. 2–5 year lifespan.

Cost: $400–$1,200.

Wood-Fired

Cedar or redwood tubs heated by a wood-burning stove (submerged or external). Off-grid — no electricity needed. Simple, rustic, and natural. No jets (still water). Takes 2–4 hours to heat. Popular in cabins and rural properties.

Cost: $3,000–$8,000.

Key Features

Jets: More isn't always better. What matters: jet variety (rotating, pulsating, directional), placement (targeting back, shoulders, feet, wrists), and adjustability. 20–40 well-placed jets outperform 80 random jets.

Insulation: Full-foam insulation (best — fills the entire cabinet), partial foam, or reflective barriers. Better insulation = lower operating cost. Premium tubs have full-foam insulation.

Energy efficiency: Look for: full-foam insulation, a high-quality cover (4-inch tapered, with a good seal), efficient pump(s), and a circ pump (small pump for filtration that runs instead of the main pump). Energy Star certified tubs use $20–40/month. Poorly insulated tubs: $50–$100+/month.

Electrical Requirements

120V (plug-and-play): Plugs into a standard GFCI outlet. Limited to small tubs (2–4 person). Slower heating. Lower jet power. No electrician needed.

240V (hardwired): Required for most full-size hot tubs. Requires a dedicated 50-amp or 60-amp circuit from the electrical panel to a GFCI disconnect box within sight of the tub. Must be installed by a licensed electrician. $500–$1,500 for electrical work.

Installation

Hot tubs need a level, solid surface: reinforced concrete pad (best), paver patio on compacted base, or reinforced deck (consult a structural engineer — a filled hot tub weighs 3,000–6,000 lbs). Access for delivery: hot tubs are delivered by crane or carried through gates (most tubs fit through a 36-inch opening when tilted).

Maintenance

Test water 2–3 times per week (pH, sanitizer). Add bromine or chlorine as needed. Shock weekly. Drain and refill every 3–4 months. Clean filters monthly. Replace filters annually. Clean the cover with UV protectant.

Costs

Inflatable: $400–$1,200.

Entry-level acrylic: $4,000–$8,000.

Mid-range: $8,000–$15,000.

Premium: $15,000–$20,000+.

Electrical (240V): $500–$1,500.

Concrete pad: $500–$2,000.

Monthly operating cost: $20–$50 (efficient) to $50–$100+ (poor insulation).