Condensing Make-up Air Units
Condensing make-up air (MUA) units are the smart way to provide fresh air to common areas in commercial buildings. These high-efficiency units feature high turn-down modulating burners with stainless steel heat exchangers. Choose from three categories of efficiency that include constant speed, 2 speed motor or variable frequency drives (VFD)—a great investment that provides payback for your business year after year.
CONDENSING MAKE-UP AIR UNIT INCENTIVES
for Commercial/Industrial new construction and existing buildings
- Constant Speed
$0.30/CFM per unit
- 2 Speed
$0.35/CFM per unit
- Variable Frequency Drive
$0.40/CFM per unit
Bonus incentives exclusively for units over 5,000 CFM
2 Speed bonus - $1,500
per unit on top of $0.35/CFM incentive
VFD bonus - $2,500
per unit on top of $0.40/CFM incentive
Service Provider Incentive
- ≥ 90% thermal efficiency for new installations and equipment replacements
- Incentive applies to units ≥ 1,500 to ≤ 14,000 CFM
- Buildings with demand control ventilation are not eligible
Work With a Trusted Service Provider
Locate qualified professionals who are experienced with Union Gas programs. These trusted providers are ready to help you assess the best energy-efficient equipment solutions for your business.
Find a Professional
Apply for Equipment Incentives
The process is easy. Simply complete the online application. After you submit it, a Union Gas Energy Conservation Advisor will contact you within 5 business days to review your application and discuss next steps.
More Information About Make-up Air Units
As a part of a heating, ventilating and air-conditioning (HVAC) system, a rooftop condensing make-up air unit (MUA) is a larger air handler that circulates and conditions 100% outside air.
How Condensing Make-up Air Units Work
MUA units are a common form of ventilation. They introduce fresh air into a building and exhaust building air through multiple exhaust fans located all around the building.
MUA units are located on the rooftop of a building and supply 100% outdoor air. As shown in the diagram, the MUA takes in fresh outdoor air and passes it through a bank of filters and dampers to remove contaminants and regulate the amount of air brought in.
The incoming air can then be efficiently heated by an indirect gas-fired heat exchanger. The heated air is then either blown directly into a building space or it can be ducted to target locations.
- Condensing technology offers efficiencies of over 90% compared to the 78%-82% efficiencies of non-condensing MUA units
- High turn-around feature results in better control and comfort
- Energy efficiency lowers operating costs
- Improved air quality creates a more comfortable work environment for employees and customers
MUA units require routine maintenance and inspections. Managers should schedule inspections and maintenance on a semiannual basis with a technician from the manufacturer or service provider.
Most commercial and industrial buildings can benefit from installing a high-efficiency condensing MUA unit including restaurants and commercial kitchens, gymnasiums, auto repair shops, wastewater and sewage treatment facilities, and manufacturing and assembly plants.