6-36 Ton Hitachi SmartFlex™ VRF Systems

Rated highest for energy efficiency

Hitachi SmartFlex™ VRF systems rank impressively high in the ratings that matter most for VRF technology

Hitachi SmartFlex™ VRF systems rank impressively high in the ratings that matter most for VRF technology: simultaneous cooling and heating efficiency (SCHE) and integrated energy efficiency ratio (IEER). The traditional measure of HVAC equipment, energy efficiency ratio (EER), measures system efficiency at full load. Using EER ratings may be appropriate for equipment that operates in a traditional cycle (fully on or fully off), but it is not appropriate for properly sized VRF systems, Since VRF systems have the ability to spend the vast majority of time at part load, reaching full load only on the hottest or coldest days. Hitachi SmartFlex™ VRF systems thereby excel against truer measures of efficiency and the following should be considered when evaluating solution choices:

  • SCHE applies to VRF systems with energy recovery features. It is defined as the ratio of a system’s total capacity (heating and cooling) to the effective power consumption. Hitachi SmartFlex™ VRF systems carry SCHE ratings as high as 32.2.
  • IEER expresses cooling efficiency based on weighted operation at various part-load conditions. Hitachi SmartFlex™ VRF systems carry IEER ratings as high as 26.5.
  • The Coefficient of Performance (COP) ratio expresses the efficiency of a heat pump while in heating mode. COP rating according to AHRI is calculated at two different ambient temperatures, 47°F and 17°F. Hitachi SmartFlex™ has COP 47°F and COP 17°F values up to 4.25 and 2.78, respectively.

The cost-effective, energy-efficient choice

VRF systems effectively address the ongoing challenge of climate control in buildings - balancing comfort and efficiency - by delivering just the right amount of heating and cooling to every space using no more energy than necessary. VRF technology achieves this balance by using DC inverter scroll compressors to save energy and avoid the wear and tear of frequent cycling. These compressors improve air conditioning efficiency by modulating refrigerant delivery to each specific zone to meet demand. 

Key Benefits

  • Exceptional efficiency with an average of up to 39% energy savings for some applications compared to conventional HVAC systems.
  • Flexibility to specify a customized modular system to the exacting requirements of each project, with options that include heat pump and heat recovery systems and a host of fan coil options.
  • Freedom for designers to choose ducted systems with short or long runs, or non-ducted systems that require much lower clearance between building floors (and reduce construction costs as a result).
  • Impressively quiet comfort, with control to deliver precisely the correct amount of heating or cooling to each zone.

Taking technology to the next level of performance

We now offer a full line of Change-Over Box options. These include: Single-Port Change-Over Boxes in two sizes and Multi-Port Change-Over Boxes with 4,8 and 12 ports for ultimate flexibility in system design.

Our Change-Over Boxes offer:

  • Built-in simplicity. The Change-Over Box directs refrigerant to the desired zone and indoor unit(s). Since our design does not produce and condensate, no drain or condensate considerations are required.
  • Quieter operation. Each box has a minimum number of valves that are engineered to minimize noise and condensation. This increases placement flexibility.
  • Reliable performance. Valves in Change-Over Boxes work according to the cooling and heating demand of each zone. For added reliability, they are protected with a fine mesh strainer in the refrigerant circuit. Plus, an optimized box design enables easy service access if required.