NYC HVAC Guides
Straight Talk About HVAC in New York City
No fluff, no generic advice. These guides cover the real decisions NYC building owners, property managers, and contractors face when dealing with through-wall AC, PTAC replacements, and pre-war building HVAC projects.
Faster Availability
Custom NCP Units: Identical to Aerosys, Ready in 2 to 3 Weeks
Aerosys has permanently closed. We custom-build National Comfort Products units to match Aerosys systems with a 36x19 footprint and custom grilles and sleeves, and deliver them in about 2 to 3 weeks.
Read GuideEquipment Selection
PTAC vs Through-the-Wall AC: What NYC Buildings Need to Know
The real differences between PTAC units and through-wall split systems, when each makes sense, and the sleeve compatibility issues that trip up NYC building owners.
Read GuideSizing & Specs
Through-the-Wall AC Sizing Guide for NYC Apartments
How to measure your wall sleeve, match BTU capacity to room size, and avoid the voltage and amperage mistakes that plague NYC building replacements.
Read GuidePre-War Buildings
High-Velocity HVAC for NYC Pre-War Buildings
Why small-duct high-velocity is often the only viable AC option for pre-war apartments, how the installation works, and what the project actually costs.
Read GuideBoard Approval
NYC Co-op and Condo HVAC Approval Guide
What your board actually requires for HVAC work, how alteration agreements work, insurance minimums, and realistic timelines for getting approval.
Read GuideEquipment Guide
Aerosys TTWC Condenser Guide: Models, Specs & NYC Compatibility
Complete breakdown of all 6 Aerosys through-the-wall condenser models. Standard vs LX series, pricing, sizing for NYC apartments, and how they compare to NCP and AboveAir.
Read GuideCommercial Guide
Commercial HVAC in New York City: Systems, Codes & What Building Owners Need to Know
Through-wall condensers, high-velocity systems, Local Law 97 compliance, and DOB permit requirements for NYC offices, hotels, retail, and mixed-use commercial buildings.
Read GuideRetrofit Guide
Fan Wall Retrofit in NYC: Replacing Outdated HVAC in Pre-War & Commercial Buildings
How NYC buildings replace aging central fan systems with modern through-the-wall condensers, high-velocity systems, and fan coil units. Retrofit options, costs, permits, and equipment sizing.
Read GuideBrownstone Guide
Best HVAC Options for NYC Brownstones: A Contractor's Guide
Brownstones have unique HVAC challenges: no ductwork, thick masonry walls, narrow lots, and Landmarks restrictions. High-velocity systems, through-the-wall condensers, and what actually works.
Read GuideReplacement Guide
PTAC Replacement in NYC: Cooperative Village, Kips Bay, Murray Hill & FiDi
Neighborhood-specific PTAC replacement advice for NYC property managers. Through-wall split upgrades, sleeve compatibility, DOB permits, realistic pricing, and timeline by neighborhood.
Read GuideElectrification Guide
Commercial Heat Pumps in NYC: Local Law 97 & the Path to Electrification
How NYC commercial and multifamily buildings electrify with heat pumps to meet Local Law 97 emissions caps: equipment paths, cold-weather performance, costs against avoided penalties, and phased retrofit strategy.
Read GuideRetrofit Guide
Air Handling Unit (AHU) Retrofit & Replacement in NYC
When to retrofit vs replace an aging air handling unit, why EC fan array upgrades are the highest-return move, coil and controls modernization, costs, and permits across Manhattan, Brooklyn, and Queens.
Read GuideVentilation Guide
Dedicated Outdoor Air Systems (DOAS) in NYC
How DOAS decouples ventilation from heating and cooling for better fresh-air control, humidity control, and efficiency. DOAS heat pumps, energy recovery, system integration, and Local Law 97 benefits.
Read GuideSizing Reference
Through-the-Wall AC Sleeve Sizes: Standard Dimensions Chart
The standard through-the-wall AC sleeve sizes 26x16, 26x18, 42x16, and 36x19, with reference charts, how to measure your existing opening, and how to match a replacement unit or condenser.
Read GuideInstallation Guide
High-Velocity AC Installation in NYC: Cost & Contractor Guide
What high-velocity AC installation costs in NYC, how the small-duct install works, and how to choose a qualified high-velocity contractor for brownstones, pre-wars, and buildings without room for ductwork.
Read GuideNeed Help Choosing Equipment?
Send us your sleeve dimensions, room layout, and building specs. We’ll tell you exactly what fits and what it costs. No runaround.