# Mestek, Inc.: Hamilton Engineering Torus Indoor WB1501 certified (Commercial boilers)

**Launch Signal Score:** 25/100

| Field | Value |
|---|---|
| Manufacturer | Mestek, Inc. |
| Brand | Hamilton Engineering |
| Model | Torus Indoor WB1501 |
| Model number | HTH 01501 A |
| Category | Commercial boilers |
| Certified | 2026-08-04 |
| On market | 2026-03-16 |
| Markets | United States, Canada |

## Why this score


Source: U.S. EPA ENERGY STAR certified products data (data.energystar.gov) (https://www.energystar.gov/productfinder/product/certified-commercial-boilers/details/4682306). Last refreshed: 2026-11-04T21:42:02.081Z.
From EPA's ENERGY STAR certified-products data as published; ENERGY STAR is a U.S. EPA program and this site is not affiliated with EPA. Manufacturer-level data. Informational only.