STERLING HSB08411 Hot-Water Unit Heater | Montreal, Laval, Longueuil, South Shore & North Shore

A mid-sized unit heater for garages and commercial spaces

The HSB08411 in a few words

The Sterling HSB08411 sits in the middle of the HS series. This horizontal unit heater hangs from the ceiling, receives the hot water from your electric boiler or air-to-water heat pump and blows 1,400 CFM of warmed air, at 900 FPM at the outlet. With 200°F entering water, 60°F entering air and a 20°F drop, Sterling publishes 61,000 BTU/h, and 54,900 BTU/h at reduced speed (1,100 CFM).

It is also the first size in the series with a 1/12 HP motor. It runs on 115 V, single phase, 60 Hz, single speed, and the manufacturer describes it as totally enclosed with thermal overload protection. It suits a municipal garage, a commercial space opening onto a delivery dock or the maintenance shop of a property portfolio.

One unit or several smaller ones: how we decide

In a good-sized garage or commercial space, two approaches often look equal on paper. A single HSB08411 simplifies the piping and the electrical connection. Two smaller units spread the air better in a long or cluttered room. We decide after the visit, from the floor plan and a heat-loss calculation.

Either way, water temperature remains the starting point. Sterling publishes the factors to apply to the 200°F rating: 0.857 at 180°F, 0.715 at 160°F, 0.571 at 140°F, 0.429 at 120°F and 0.286 at 100°F. An electric boiler or air-to-water heat pump that supplies cooler water will therefore give less heat per unit, and the calculation accounts for it.

On the loop side, the HSB08411 needs 6.1 GPM with a 20°F drop, for a pressure drop of 0.24 ft H2O. The coil accepts hot water or a propylene glycol solution, and it is rated up to 150 PSI (1,034 kPa) on hot water.

What our installation covers

The documents we verified do not list the box contents. Our quote therefore includes everything needed: hanging rods, isolation valves, air purging and control. Our technicians hang the unit level, connect it to the loop, make the 115 V electrical connection, then start it up and check the flow.

AirGreen is a family business established in Montreal for more than fifteen years, holding RBQ licence 5645-9605-01 (ventilation, refrigeration and electrical). We serve Montreal, Laval, Longueuil, the North Shore and the South Shore.

Let’s compare the options for your space

Ask for a free on-site estimate: in a written quote, we present the single-unit or multi-unit option, with the water temperature used. Financing is available.