Industrial Grade Direct Fired Make Up Air Handlers

Welded Construction Make Up Air Units Ensure Indoor Air Quality (IAQ) in the Most Demanding Workplaces

The RAPID^® 4000-Series is a customizable ultra-efficient direct-fired heating, cooling and pressurization system. Available from 5,000-150,000 CFM.

RAPID^® 4000-Series are extremely durable and long-lasting, creating Rapid’s reputation for industrial-grade quality and long lifespan. Constructed with an external skin welded to an internal welded structural steel framework, energy efficient airfoil fans and heavy-duty fan bearings with an ABMA L-10 rated life of 100,000 hours, energy efficient & low maintenance direct-fired burner and manifold.

Specs

Rapid 4000 Heavy-Duty Construction

IAQ and Comfort Benefits of Make-Up Air

Improved indoor air quality - Helps dilute and expel airborne contaminants making exhaust systems operate more efficiently
Heating and ventilation flexibility - System can be designed to automatically modulate outdoor air, return air and/or discharge air volume to meet application needs
Consistent temperatures and less stratification - Optional cooling effectively reduces indoor air temperatures to help keep people and processes productive
Ease of management and control - Optional computer-based Infinity-Pro Controls provide system information easily and effectively
Cost savings - Heating systems deliver 100% of the heat generated into the building resulting in energy savings

Reliable & Efficient

System that puts 100% of the available heat in the airstream, no exhaust flue = energy savings.
30:1 fully-modulating burner that maintains 100% combustion efficiency
Energy efficient airfoil fan wheel, delivering quieter operation & requiring lower HP motors.
Electric spark ignition system
ETL certifies compliance to the standards ANSI Z83.18 or Z83.4
Unit that uses up to 50% less energy
Remote Control Panel for easy operation and remote temperature adjustment
Electronic fuel modulation providing immediate response
Operation of fan only in warm weather to enjoy free ventilation cooling
Positive low-fire start
High temperature and low temperature automatic shutdown
Fused primary circuits

Ease of Installation/Maintenance Provided

Other Options

Discharge plate or heads with optional motorized blades
Roof curbs, mounting legs and service platforms
Outdoor air filters, filter mix boxes and inlet hoods/plenums (High efficiency filtration available)
Class II and III fan wheels / aluminum wheels and inlet cones
Double-wall, high temperature and stainless steel cabinet construction
Premium-efficiency motors
Low-leakage dampers
Usable with high external static and high gas inlet pressures
Variable frequency drive

The units feature the RAPID^® ICS Digital controls. These controls can monitor, diagnose, log and report on more than thirty functions including temperature, humidity and building pressure. The Windows™ - based system is extremely user-friendly with interactive displays that simplify initial air handler setup and changes to units in operation.

Intelligent Control Features

Conventional Control Features

Evaporative Cooling

RAPID^® 4000-Series evaporative cooling system is an economical solution. It requires no air-cooled condenser, chiller or cooling tower, chilled water pumps or distribution piping/insulation, major motor control center or electrical gear. Operating costs are a fraction of similar-capacity mechanical refrigeration systems.

Evaporative cooling works when warm air passes over specially treated wetted media. The heat passes from the air to the wetted media, causing the water to evaporate and air to cool.

Mechanical Cooling

For situations requiring temperature and humidity levels lower than the performance parameters available with outdoor air alone or with evaporative cooling, RAPID™ 4000-Series offer a broad range of cooling options.

Cooling options can be added by simply installing one of our coil sections equipped with the appropriate cooling coils and a condensing unit or chiller. The versatility afforded by the coil section enables you to utilize DX refrigerant, chilled water or other types of cooling coils in your system.

Reheating After Cooling

If your facility is such that reheating the air after cooling is necessary to maintain comfort levels, an electric, hot-water or steam coil can be installed in the same RAPID® coil section.

Heating coils can also be used as sources of heat instead of the standard direct-fired burner during the heating season. As such, they are more viable for certain kinds of projects, such as locations with a steam boiler plant for the process loads. Another option is to supplement your direct-fired heat with recovered heat by using a heat-recovery coil. Rapid Engineering can readily build units to take advantage of various situations.

Links & Docs

4000-Series Downloads

Model Configurations

The units are available in four different air styles- MUA (100% outside air with a fixed discharge air volume), FR (fixed 80% return air / 20% outside air with a fixed discharge air volume), AM (modulating return air / outside air with a fixed discharge air volume) and VAV (100% outside air with a variable discharge air volume). These four different air styles, along with the availability of evaporative cooling, mechanical cooling, post-cooling reheat and a wide variety of accessories, make these units extremely flexible and able to meet a very diverse range of heating and cooling needs.