With over 10,000 make-up air units sold annually, RuppAir understands the needs and requirements of our customers. We stand behind our systems, bringing 50 years of experience, unparalleled customer service and expert application support to each unique configuration.
RuppAir is uniquely qualified to handle the needs of our engineering customers. We provide instant to scale AutoCAD and PDF drawings for simplified system design and specification. RuppAir offers specific application guides with past expertise. We are committed to helping you configure and design a system that meets all of your needs while optimizing your return on investment.
Resources
SpecBuilder Specifying Software
AutoCAD & Revit Files:
Please contact your local sales representative for a project-specific AutoCAD (.dwg) or Revit file. Product submittal drawings can be found under the Resources tab of your specific product’s page.
Safety:
RuppAir carefully takes all industry-standard safety codes into consideration to ensure a safe design for your client, including ASHRAE 62.1, and ANSI Z83.40.
Common Formulas
Technical White Papers:
Case Studies:
Cost Analyses:
Direct Fired vs. Indirect Fired Heating
Heated Make-Up Air Annual Cost Comparison
RuppAir offers a unique indirect fired unit with a constant 80% efficiency. By modulating both the gas and the air to the heat exchanger, a constant air to fuel ratio is maintained, resulting in energy savings for the user.
| Project Location |
Minneapolis, MN |
| Quantity of Units |
1 |
| Heater CFM |
8,000 CFM |
| Annual Heating Season Degree Days (Per Chart) |
8,500 |
| Average Winter Outside Air Temperature |
-7.6 °F |
| Cost of Electricity/KW-hr |
$0.11 |
| Discharge Air Temperature |
70 °F |
| Cost of Gas/Therm |
$0.61 |
| Hours of Operation Per Day |
18 hrs |
| Days of Operation Per Week |
6 |
| Days of Winter Operation Per Year |
120 days |
Data based on actual figures from Minneapolis, MN.
Indirect fired heater comparison
| |
Rupp indirect fired bent tube (IBT) |
Standard Indirect Fired |
| Average Daily Temperature - Heating Season (°F) |
25 |
25 |
| *Average Heating Season ΔT (°F) |
45 |
45 |
| Average Annual BTU/Hr Output Required |
213.98 |
213,98 |
| Average Annual Heat Exchanger Efficiency (%) |
Constant 80% |
74.7% |
| Average Annual BTU/Hr Input Required |
267,409 |
286,382 |
| Total Therms Utilized/Year |
8,664 |
9,279 |
| Total Gas Consumption Cost/Unit |
$7,018 |
$7,516 |
| Estimated Annual Cost & Energy Savings (%) |
7% |
| Estimated Annual Cost Savings ($) |
$498 |
| Estimated Life Cycle Cost Savings (15 Years) |
$7,470 |
Belt Drive vs. Direct Drive
RuppAir offers a wide variety of direct drive make-up and exhaust fans. These systems are not only easy to balance, but they require little maintenance and offer large energy savings by eliminating belt losses.
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