Malcolm Drilling

Malcolm Drilling, based in Mukwonago, Wisconsin, is a geotechnical and foundation contractor serving the construction industry since 1962. Timeline: January 2021 to June 2021. H&H Mechanical completed a full HVAC system installation for Malcolm Drilling’s new manufacturing space in Mukwonago, including rooftop HVAC, VAV zoning, make-up air, exhaust, and controls.

Scope of Work

H&H Mechanical Contractors provided and installed:

H&H Mechanical provided and installed:

• 1 Carrier RTU for the office area, with associated supply and return ductwork
• 1 RTU roof curb
• All necessary natural gas piping serving the RTU and unit heaters
• 16 VAV boxes in the office area for zoning
• Carrier BACnet i-Vu control system for HVAC controls throughout the office area
• All associated ductwork and controls for the VAV system
• 3 gas-fired unit heaters
• 1 make-up air (MUA) unit interlocked with the exhaust system
• 1 ductless split system serving the office IT room

Results

This project delivered a complete HVAC and ventilation system for a new manufacturing space, designed to support heavy equipment operations and demanding production conditions. All systems were installed per approved construction documents, manufacturer requirements, and applicable codes.

The scope included a commercial rooftop unit with gas-fired heating and DX cooling, installed on an approved roof curb with coordinated electrical, gas, and condensate connections. Supply, return, and exhaust ductwork was shop-fabricated and installed to SMACNA standards, with air distribution planned for high-bay areas to help maintain temperature uniformity and reduce stratification.

A dedicated mechanical ventilation and exhaust system was installed to help remove heat, fumes, and airborne contaminants generated by drilling and fabrication processes while maintaining building pressurization and indoor air quality. The HVAC system was integrated with programmable controls to support zoning, scheduling, and energy-efficient operation between production and support spaces.

Final startup, testing, adjusting, and balancing (TAB) verified airflow quantities, temperature performance, control sequences, and safety interlocks.