An air handling unit replacement in Queens involves swapping out an aging AHU cabinet or its major components with new equipment matched to ...
Manhattan · Brooklyn · Queens
Commercial HVAC contractor for New York City buildings
For over 40 years, Irving Haase & Co. has installed, replaced and maintained HVAC systems in commercial spaces and luxury multifamily buildings across New York City.

What we do
Installation, replacement and maintenance for commercial systems
We install, repair and replace in kind the equipment New York buildings run on, and we keep it running with maintenance agreements built around your building.
VRF systems
Installation and replacement of VRF systems for offices and luxury residential buildings.
VRF services →Rooftop & packaged units
Rooftop unit and packaged A/C replacement for commercial buildings.
Rooftop units →Water source heat pumps
Repair and in-kind replacement of water source heat pumps.
Heat pumps →PTAC units
PTAC repair, replacement and winterization for multifamily and commercial buildings.
PTAC services →Computer room AC (CRAC)
CRAC unit replacement for server rooms and other critical spaces.
CRAC units →Maintenance contracts
Preventative maintenance and service agreements tailored to your building's mechanical footprint.
Maintenance contracts →
Why Irving Haase
A mechanical contractor New York building teams return to
Property managers, owners and general contractors call us for projects that need to be done right the first time.
40+ years in NYC
Decades of work in Manhattan, Brooklyn and Queens buildings.
Plan and spec bidding
We bid plan and spec work for commercial renovations and luxury multifamily buildings.
Maintenance built for your building
Custom preventative maintenance and service agreements, matched to your equipment.
SCA projects
We take on prevailing-wage work for the NYC School Construction Authority (SCA).
Service area
Serving Manhattan, Brooklyn and Queens
From the blog
Commercial HVAC guides for NYC buildings
Commercial exhaust fan installation in Queens covers the removal and setup of roof-mounted, wall-mounted, and inline exhaust equipment that ...

Water source heat pumps (WSHP) and variable refrigerant flow (VRF) systems are the two most common choices when NYC property managers and ge...
FAQ
Questions from property managers and building owners
Common questions about maintenance, repairs and replacements. Don't see yours? Call (718) 271-4100.
How often should commercial HVAC systems be serviced?
Most commercial HVAC systems should be professionally maintained two to four times per year, following the manufacturer's recommendations, so cooling is ready before summer and heating is ready before winter.
What is included in a commercial HVAC maintenance agreement?
Our preventive maintenance agreements are customized to the equipment in your building. Visits typically include scheduled inspections, cleaning, adjustments and testing, with every unit maintained to the manufacturer's specifications.
How do I know if equipment should be replaced instead of repaired?
Signs include frequent breakdowns, uneven temperatures, rising energy bills, or equipment older than 10 to 15 years. An inspection shows whether a repair or an in-kind replacement, matched to your existing infrastructure, is the better investment.
Do you bid plan and spec renovation projects?
Yes. We bid tenant fit-outs, white-box renovations and retrofits from your engineer's mechanical drawings and install exactly as drawn, coordinating with the general contractor throughout.
What equipment do you service?
Rooftop and packaged units, VRF systems, water source heat pumps, PTAC units, commercial split and ductless systems, computer room AC (CRAC) units, cooling towers, and exhaust fans, in commercial and luxury apartment buildings across Manhattan, Queens and Brooklyn.
Can HVAC maintenance improve indoor air quality?
Yes. Regular maintenance improves indoor air quality by replacing dirty filters, cleaning system components, and ensuring proper airflow. A well-maintained system reduces dust, allergens, and airborne contaminants for healthier, more comfortable buildings.
Planning an HVAC project?
Tell us about your building and equipment. We'll follow up to scope the work and put together a proposal.