K–12 & Higher Learning

A number of organizations have developed standards to improve the learning environment by developing guidelines for high performance schools that are well ventilated, acoustically sensitive, thermally comfortable and energy efficient—the U.S. Environmental Protection Agency, the Collaborative for High Performance Schools, NREL and USGBC to name a few.

However, ASHRAE has developed an Advanced Energy Design Guide to provide practical and realistic strategies for improving the learning environment, with off-the-shelf technologies, that is free to download and very accessible. It is written in a “how-to” format and its recommendations are based on modeling prototype schools (elementary, middle and high schools) in each of the climate zones (as defined in 90.1) for each of several different HVAC systems that are most commonly used, namely ground source heat pump with DOAS, fan-coil system with DOAS and VAV air handling system with DOAS.

Based on these simulations, the best way to achieve a 50% energy savings while improving the indoor environment for students and teachers in all climate zones was not limited to (but included): the use of ground source heat pump systems (GSHP), Dedicated Outdoor Air Systems (DOAS) and exhaust air energy recovery.

In order to achieve the 50% savings though, the energy recovery device needed to achieve a 60% enthalpy reduction for humid (A) or marine (C) climates where this is defined as a change in enthalpy of the outdoor air equal to (or greater than) 60% of the difference between the outdoor air and return air enthalpies. Or alternately, for dry (B) climate zones the requirement was for a 60% temperature reduction between the outdoor air and return air.

Venmar CES Dedicated Outdoor Air Solutions® are designed with high efficiency energy recovery technologies at their core and incorporate a variety of extremely efficient options and features to meet or exceed your design objectives.

Depending on your application, Venmar CES also has a variety of classroom ventilation equipment that is ideal for portable classrooms or retrofit applications.

Battle Creek Central High School – Battle Creek, MI

EnergyPack® Air Handlers with Ground Source Heat Pumps and Enthalpy Wheels/Plate Heat Exchangers

    Venmar CES Dedicated Outdoor Air System with Energy Recovery
  • A 250,000 sq. ft. high school renovation with a 160,800 sq. ft. expansion.
  • Involved 14 Venmar CES EnergyPack air handlers with integrated ground source heat pumps—some with enthalpy wheels and some with plate heat exchangers.
  • Air handler sizes ranged from 3,800 to 42,500 cfm. Largest AHU provided dehumidification in pool area and incorporated an aluminum air-to-air plate heat exchanger with AHRI Certified™ performance.
  • Heat pumps utilize ground water as the heat sink and provide the school with simultaneous heating and cooling throughout the year.

John E. Jaqua Academic Center – Eugene, OR

EnergyPack Rooftop Air Handlers with Water Source Heat Pumps and Energy Recovery

    Venmar CES Rooftop Air Handler
  • A 40,000 sq. ft. learning center for student athletes located at the University of Oregon in Eugene, Oregon occupied in 2010.
  • Unique building design incorporates a curtain wall of glass, with a 5-foot space between it and the actual building wall, which is also largely glass.
  • Neutral ventilation air is supplied to the space by Venmar CES rooftop EnergyPack dedicated outdoor air units with integrated water source heat pumps (WSHP).
  • Unit sizes: 5,500 cfm, 5,200 cfm and 2,835 cfm, with integrated WSHP sizes 4 to 8.5 tons.
  • Excess building relief air and bathroom exhaust air are ducted through an AHRI Certified plate heat exchanger inside the unit.