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Carrier
2.5 Ton Water Source Heat Pump
Carrier Vertical, Left Hand Return, Copper Coil, R-454B | 50WCE030FBA3BA-A
$3,607.99
A 2.5 ton water-source heat pump delivers 30,000 BTU for a mid-size zone. Sizing it isn't just about the space — it's about the loop, because the flow rate feeding the unit shapes how much capacity you actually get.
2 products
Water-source units need a minimum water flow — measured in gallons per minute (GPM) — to hit their rated capacity, and stepping up a size means the loop has to supply more flow. Before choosing between 2.5 and 3 tons, confirm the loop can deliver the GPM the larger unit needs; otherwise the bigger unit underperforms. On a shared building loop, this is a design question as much as a comfort one.
Deciding between 2.5 and 3 tons on your loop? We'll check flow and sizing with you →
Water-source heat pumps need a minimum gallons-per-minute flow to reach their rated capacity. A larger unit needs more flow, so before upsizing you must confirm the loop and pump can supply it — otherwise the bigger unit underperforms.
Match the zone's load, then confirm the loop can deliver the flow the larger size needs. If the loop is flow-limited, a right-sized 2.5 ton unit may outperform an oversized 3 ton that's starved for water.
Gallons per minute — the water flow rate through the unit. It's a key spec for water-source heat pumps because capacity and efficiency depend on adequate flow.
30,000 BTU per hour of nominal capacity, with actual output set by entering water temperature and flow.
