THERMO 2000 BuffMax BUFF175A-3NPT-HRZ-HT ASME Buffer Tank (175 gallons)

175 US gallons of reserve, in a tank built to the ASME code

When an electric boiler or an air-to-water heat pump heats an entire building, the water loop needs a volume that absorbs swings in demand. The Thermo 2000 BuffMax BUFF175A-3NPT-HRZ-HT buffer tank provides 175 US gallons of insulated heating water, in a vessel built to Section VIII, Division 1, of the ASME Boiler and Pressure Vessel Code. Like the whole series, it combines buffer tank, storage tank and hydraulic separator.

The middle size of the ASME series

Thermo 2000 offers three ASME BuffMax tanks: 120, 175 and 200 gallons. The BUFF175A is the one we select when the loop calculation goes beyond the first size without justifying the largest. Take a multi-storey building in Montreal where each unit has its own thermostat, or a commercial building on the South Shore whose zones open and close with business hours. The reserve lets the source run longer cycles, while the four 3 in NPT connections, split two per side, isolate its circuit from the distribution circuit. These multi-zone loops, supplied by a low-mass boiler or a heat pump, are exactly what Thermo 2000 recommends the BuffMax for.

An 87-inch tank is planned before delivery

At 87 inches high and 32 inches in diameter, the BUFF175A does not fit everywhere. Before ordering, we measure the clear height of the mechanical room, the door widths, the stairs and the path from the truck. Lifting lugs make handling easier; once in place, the tank stands on adjustable legs. Supplied accessories: 1/2 in ball valve and automatic air vent, 2 1/2 in temperature and pressure indicator, immersion well and 3/4 in drain valve, in addition to three 1/2 in well connections on the tank.

On insulation, Thermo 2000 announces 2 inches of HFC-free polyurethane and heat loss limited to 1/2 °F per hour. The maximum working pressure is 125 psi, the ASME value published by the manufacturer.

Heating only, in a closed loop

The HT suffix means heating water. For a loop that also carries chilled water, you need an HC BuffMax, which is not built to the ASME code. The BXT option, which adds centre connections, is not available on ASME models. And the tank is never connected to domestic hot water or to an atmospheric system. If your specification requires a CRN number, note that the manufacturer’s documentation does not state one: we confirm it with Thermo 2000 before ordering.

What AirGreen does

1. Free on-site visit and estimate, in Montreal, Laval, Longueuil, on the North Shore or on the South Shore.
2. A written quote, with the size chosen and the handling plan.
3. Delivery, setting the tank and connecting the source side and the distribution side.
4. Filling, purging and commissioning the loop.

A family business established in Montreal for more than 15 years, AirGreen holds RBQ licence 5645-9605-01 in ventilation, refrigeration and electrical work. Thermo 2000’s warranty covers the tank for 5 years in heating applications and the mechanical parts for 2 years, under its terms.

Send us your building’s plans or specification: we validate the size and the access before sending you a written quote. Free estimate and financing available.