Water heaters
A. O. Smith Voltex X Split Heat Pump Water Heater, 47 gal
Prices are the equipment only — the appliance, before install labour. Every product in this catalogue currently has at least one real, seller-observed equipment price (see the SKU verification and price observation notes on each product). Get contractor quotes for the install itself, especially for anything needing new electrical circuits or condensate drainage.
Outdoor CO2 split-system heat pump water heater introduced in August 2026, with a 47-gallon indoor tank and a model-specific UEF of 3.52.
Our take
Moving the compressor outdoors directly addresses the noise, room-air and cold-space compromises owners discuss across the category. The trade is a more involved split-system installation. This configuration launched in August 2026, and we found no usable exact-model owner reports, so the design logic is stronger than the field evidence.
Best for
Cold-climate or space-constrained homes where an integrated indoor HPWH is a poor fit.
Watch out for
No usable exact-model owner reports yet. Get line-set routing, freeze protection, commissioning and labor coverage in writing.
What sellers are actually charging
Real listings, read on the date shown — none currently in stock at the observed price. Prices change — click through to check before you act on any of them.
| Seller | What you get | Price | Stock | Seen |
|---|---|---|---|---|
| Bath1.com
online retailer |
equipment outdoor only | $3,541 | out of stock | 2026-09-08 |
| Bath1.com
online retailer |
equipment outdoor only | $3,541 | out of stock | 2026-09-08 |
Equipment price is not installed price. The listings above are what the hardware costs. Installation — labour, electrical, refrigerant lines, permits, removing the old system — is typically a similar amount again, and varies more between contractors than between brands. Where we have an installed figure it is labelled as such and comes from someone who actually installs.
Compare against
SANCO2 CO2 Heat Pump Water Heater, 83 gal split system
Split-system CO2 refrigerant heat pump water heater rated to operate down to -25°F ambient, with a UEF of 3.75.
GE Profile GeoSpring Smart Hybrid Heat Pump Water Heater, 50 gal
GE's flagship heat pump water heater, relaunched under the Profile line with FlexCAPACITY mixing and Wi-Fi control. ENERGY STAR-certified at UEF 4.50 -- the highest efficiency figure in this catalogue at any size.
GE Profile GeoSpring Smart Hybrid Heat Pump Water Heater, 80 gal
80-gallon version of the same Profile GeoSpring Smart Hybrid platform as the 50-gallon model -- same UEF 4.50, larger first-hour rating.
Rheem ProTerra Hybrid Heat Pump Water Heater, 50 gal
The default heat pump water heater for most US households: 50 gallons, UEF 3.75, widely stocked and widely serviced.
Before you buy this
Ask for the first-hour rating, not just tank size, and check it against your household's simultaneous demand — showers and laundry at the same time — rather than headcount alone. If it's a heat pump water heater, confirm the room has enough air volume (or a duct kit) that it won't spend winter on resistance backup, and that there's a real route for condensate, not just a nearby floor drain. Confirm the panel has spare 240V capacity. And if you're removing a gas unit that shared a flue with a furnace, ask what happens to that flue once your water heater's draft is gone — an orphaned flue can backdraft.