Description
The Comfort-aire MBP120AKC30E01S is a 10-ton, 13.7 EER water source heat pump package unit built for commercial buildings that already have a hydronic loop — think multi-tenant office buildings, hotels, and schools where individual zone control matters. If your job requires a belt-driven, horizontal configuration with right return and back supply, this unit is spec'd exactly for that layout. It runs on 230V three-phase power and ships in new condition, ready for a qualified commercial HVAC crew to set and connect.
Key Features
- 10-Ton Capacity: Handles large commercial zones — 8,000 to 12,000+ square feet depending on load — without chaining together smaller units.
- 13.7 EER Efficiency: Delivers solid energy performance for a water source system, which helps keep operating costs reasonable on buildings where this unit runs year-round.
- Belt-Driven Blower: Lets you adjust airflow by changing the pulley ratio, so the installer can fine-tune CFM to match the actual duct system instead of being locked into a fixed speed.
- Horizontal Configuration — Right Return / Back Supply: Fits the specific duct orientation common in above-ceiling and mechanical-closet commercial installations without field-fabricating a transition.
- Water Source Heat Pump: Moves heat to and from the building's hydronic loop rather than outdoor air, so efficiency stays stable regardless of outdoor temperature swings.
- 5-Year Compressor Warranty: Covers the most expensive component for five years, which meaningfully reduces your long-term risk on a large commercial installation.
Is this the right unit for your project?
This unit is sized for large commercial zones — typically open-plan offices, hotel floors, school wings, or similar spaces in the 8,000–12,000 square foot range, though actual sizing depends on the building envelope, occupancy, and ventilation load. A 10-ton WSHP is a significant commitment; undersizing a zone leaves occupants uncomfortable and overworks the compressor, while oversizing causes short-cycling and humidity problems. Run a proper commercial load calculation before spec'ing this unit — rule-of-thumb square footage estimates are a starting point only.
Water source heat pump vs. air source package unit
A water source heat pump like the MBP120AKC30E01S pulls heat from a condenser water loop maintained at a relatively stable temperature — typically 65–95°F — so efficiency stays consistent through winter and summer. An air source package unit pulls heat from outdoor air, which means efficiency drops on the coldest and hottest days when you need it most. The trade-off: WSHP systems require an existing hydronic loop, a cooling tower, and a boiler to reject and add heat to the loop. If the building already has that infrastructure, a WSHP almost always wins on operating cost. If it doesn't, the infrastructure cost makes air source the more practical choice.
Where it fits best
- Multi-tenant office buildings with existing condenser water loops
- Hotels and hospitality properties using room-by-room zone control
- Schools and universities with central plant hydronic systems
- Large commercial spaces requiring horizontal above-ceiling unit placement
- Renovation projects replacing existing WSHP units in the same footprint
Why water source heat pumps work the way they do
A water source heat pump doesn't generate heat — it moves it. In heating mode, it extracts heat from the condenser water loop and delivers it to the space. In cooling mode, it dumps the space heat back into the loop. Because the loop is kept at a controlled temperature by the building's central plant, the unit operates at a stable, predictable efficiency year-round. That's the core advantage over outdoor air systems: the heat source and heat sink are always at a reasonable temperature, so the compressor never has to work as hard at the extremes. For buildings with many zones — where some rooms need heating while others need cooling simultaneously — the loop actually benefits from that diversity, because one zone's rejected heat becomes another zone's heat source.
Installation & what else you’ll need
The MBP120AKC30E01S requires 230V three-phase power — confirm the panel and disconnect are sized correctly before the unit arrives on site. You'll need a licensed commercial electrician for the electrical connection and a licensed HVAC contractor for refrigerant-side and hydronic connections. Plan for supply and return water connections to the building's condenser loop, properly sized for a 10-ton unit. The belt-driven blower will need duct connections matched to the right return and back supply configuration — verify your existing ductwork or fabricate transitions before setting the unit. A commercial thermostat or building automation system compatible with water source heat pumps is required for control. Factor in isolation valves, flow regulators, and flexible duct connectors as part of a complete installation.
Frequently Asked Questions
What is the capacity of the Comfort-aire MBP120AKC30E01S?
The MBP120AKC30E01S is a 10-ton water source heat pump, which equals 120,000 BTU per hour of cooling capacity. At that size, it's built for large commercial zones — multi-tenant offices, hotel floors, school wings — not residential or light commercial applications.
What does EER mean on a water source heat pump, and is 13.7 good?
EER (Energy Efficiency Ratio) measures cooling output in BTUs divided by watts of electricity consumed at a single test condition. A 13.7 EER is a solid rating for a 10-ton commercial water source unit, indicating efficient operation when the condenser loop is maintained at design temperatures.
Does the MBP120AKC30E01S require three-phase power?
Yes. This unit runs on 230V, three-phase power only. Single-phase power will not work. Verify your building's electrical service before ordering — retrofitting three-phase power to a building that doesn't have it is a significant added cost.
What kind of building needs a water source heat pump instead of a regular package unit?
Buildings that already have a central hydronic condenser water loop — maintained by a cooling tower and boiler — are the right application for a water source heat pump. Hotels, office towers, and schools commonly use this setup. If there's no existing loop, a standard air source unit is usually more practical.
Why is the blower belt-driven on this unit instead of direct-drive?
A belt-driven blower lets the installer adjust airflow by swapping pulleys, which is useful on commercial jobs where duct systems vary widely. Direct-drive motors run at fixed speeds, so they can't be field-adjusted. For a 10-ton unit serving a large zone, that flexibility can matter when balancing airflow.
What warranty comes with the Comfort-aire MBP120AKC30E01S?
Comfort-aire backs the MBP120AKC30E01S with a 5-year compressor warranty. Verify full warranty terms and registration requirements with Comfort-aire directly at the time of purchase, as coverage conditions and parts warranty details are manufacturer-confirmed.
White Paper
- Comfort-aire MB Series Product Catalog (Part 1 of 2)
- Comfort-aire MB Series Product Catalog (Part 2 of 2)
- Comfort-aire MB Series Spec Sheet
- Comfort-aire MB Series Installation Manual (Part 1 of 3)
- Comfort-aire MB Series Installation Manual (Part 2 of 3)
- Comfort-aire MB Series Installation Manual (Part 3 of 3)
