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Velocity Boiler Works PHX400V (Phantom-XL)
Velocity Boiler Works · PHX400V
Velocity Boiler Works PHX400V (Phantom-XL) appears in the U.S. EPA ENERGY STAR "Certified Commercial Water Heaters" dataset, which lists products whose manufacturers have certified them to the program's specification (record 4480981, certified 2025-07-31). EPA publishes these rated values for the listing: Type Gas Tankless; Fuel Gas,Propane; Vent type Direct Vent; Storage volume (gal) 4; Vent size (in) 4; Input rate (thousand Btu/h) 399; Thermal efficiency TE 0.98. The listing records ENERGY STAR certification and the rated values the manufacturer reported to EPA. It is not a determination that any building, installation or design complies with a code.
✓ Verified 2026-10-03
Specs on this page were checked against ENERGY STAR Certified Commercial Water Heaters (data.energystar.gov/d/xmq6-bm79) on 2026-10-03.
Specifications
| Fuel | Gas,Propane |
| Type | Gas Tankless |
| Vent type | Direct Vent |
| Vent size (in) | 4 |
| Storage volume (gal) | 4 |
| Thermal efficiency TE | 0.98 |
| Input rate (thousand Btu/h) | 399 |
Certifications & Standards
ENERGY STAR 4480981 Certified commercial water heater, 2025-07-31
Sustainability
No sustainability metrics on file for this product.