The SMART Water-Glycol Pump System is designed for projects where supply and exhaust air streams are too far apart for passive energy recovery. Ideal for distances greater than 200 feet or for facilities requiring two-season recovery, it provides reliable energy transfer regardless of air stream location.
Coilmaster’s SMART Water-Glycol Pump System combines pump skid, coils, and air sensors into a fully integrated package that ships pre-engineered and factory-assembled. Installation requires contractors to pipe between coils and skid and wire the power supply, air sensors, and Building Management System (BMS). They also perform standard hydronic tasks including startup and installing insulation.
The system accommodates ethylene or propylene glycol mixtures, or water with corrosion inhibitors in warmer climates. It also outperforms most glycol systems, delivering sensible effectiveness greater than 50% on a six-row system at 500 FPM—meeting ASHRAE 90.1 Section 6.7.7.3 requirements for Laboratory Exhaust Systems.
A pumped water-glycol loop transfers energy between separated supply and exhaust air streams. Water glycol pumps circulate a heat-transfer fluid between coils, allowing the loop to recover energy even when the air streams are located in different areas of a facility. For layouts where passive energy recovery doesn’t make sense, the HRM-P™ SMART system provides an integrated, pre-engineered approach for distances greater than 200 feet and projects requiring two-season recovery.
Effective pump selection accounts for the full system. Engineers should carefully evaluate airflow, coil face velocity, required sensible effectiveness, the distance between coils, entering air and fluid temperatures, available pressure, and pumping requirements. Glycol type and concentration are also crucial; propylene glycol and ethylene glycol offer freeze protection, while corrosion inhibitors protect system metals.
Glycol mixtures are more viscous than water, especially at low temperatures. Added resistance can increase pressure drop and pumping power, so water-glycol pumps need to be selected against a pump curve that reflects the design fluid and temperature. Concentration, pH, and inhibitor levels should also be monitored throughout operation.
Pump type is dependent on the duty. Centrifugal pumps commonly suit high-flow circulation, while positive-displacement pumps handle higher pressure and more viscous fluids. Glycol transfer pumps move fluid between containers or systems, while circulation pumps keep fluid moving through a closed loop.
The HRM-P™ package brings the pump skid, coils, air sensors, and controls into a coordinated system. Factory integration eliminates the need to source and match separate components in the field; the controller modulates valve positions and pump speeds across heating, cooling, economizer, and frost-control modes. A 10-inch touchscreen displays system operation, while BACnet or Modbus connectivity enables BMS communication through MSTP or Ethernet.
Coilmaster ships the HRM-P™ SMART package pre-engineered and factory-assembled. Out in the field, contractors pipe between the coils and pump skid, then complete power and control wiring, air-sensor connections, and BMS integration. They also handle the insulation, hydronic startup, and other standard hydronic work.
Early coordination establishes piping routes, power access, and control points before installation begins. This is invaluable for retrofit projects and facilities where the supply and exhaust air streams are separated by long distances.
What fluid mixtures does the HRM-P™ SMART system support?
The system supports ethylene glycol, propylene glycol, or water treated with corrosion inhibitors in warm climates. Make sure the concentration matches the project’s operating temperatures and freeze-protection requirements. Fluid compatibility, concentration, and inhibitor condition should all be reviewed as part of routine maintenance.
How does the HRM-P™ support ASHRAE 90.1 requirements?
A six-row system operating at 500 FPM provides over 50% sensible effectiveness, meeting the requirements identified for laboratory exhaust systems in ASHRAE 90.1 Section 6.7.7.3.
What installation work is completed in the field?
Contractors complete interconnecting piping, power and control wiring, air-sensor and BMS connections, insulation, and hydronic startup. Most system components arrive assembled on the factory-built skid, reducing the coordination required at the jobsite.
Provide your project airflow, temperatures, coil geometry, glycol requirements, and distance between air streams with our engineers. We’ll help you review HRM-P™ configurations, technical specifications, and quote requirements for your application.
The system controller modulates valve positions and pump speeds to optimize performance in heating, cooling, economizer, and frost-control modes. A 10” touchscreen provides clear visualization of system operation for maintenance teams. For remote interfaces, the controller can communicate with your BMS via BACnet or Modbus and using MSTP or Ethernet. It can also operate independently with full automatic control.
Designing a system is easy: provide airflow rates, design summer and winter conditions, unit geometries, desired supply conditions, and the distance between air streams. Our Applications Engineers will deliver an optimized selection.