The Best HVAC in Theresa, NY

Compare the highest-rated hvac professionals in Theresa, New York. All contractors are licensed, insured, and verified through our rigorous screening process.

#1

North Country Climate Control

4.8
(127 reviews)
Verified

A full-service HVAC contractor specializing in high-efficiency heating and cooling solutions for the harsh Theresa climate. They are known for expert installation of heat pumps, furnaces, and central AC systems, with a strong focus on energy efficiency and reducing heating costs during the long winters. Their technicians are NATE-certified and EPA-certified for refrigerant handling.

11225 US Route 11, Theresa, NY 13691

Specialties & Features

24/7 Emergency Service
Energy Efficient Systems
Heat Pump Installation
Furnace Repair

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#2

Thousand Islands Heating & Cooling

4.6
(94 reviews)
Verified

A family-owned and operated HVAC provider with deep roots in the Theresa community. They excel in servicing all major brands, including Carrier and Trane, and are particularly adept at solving complex heating issues in older homes common to the area. They offer comprehensive maintenance plans to ensure system reliability through the extreme seasonal transitions.

32451 State Highway 411, Theresa, NY 13691

Specialties & Features

HVAC Maintenance Plans
Boiler Service
Older Home Expertise
Ductwork Design

Business Information

Years in Business:22 years
Licensed:Yes
Insured:Yes
#3

Black River HVAC Services

4.5
(78 reviews)
Verified

Known for their responsive 24/7 emergency repair service, Black River HVAC is a go-to for sudden furnace breakdowns during Theresa's cold snaps and AC failures in the humid summers. They provide honest diagnostics, quality repairs, and specialize in duct cleaning and indoor air quality solutions to address local pollen and allergen concerns.

8972 Water Street, Theresa, NY 13691

Specialties & Features

24/7 Emergency Service
Duct Cleaning
Indoor Air Quality
HVAC System Repair

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes

Why These Are the Top HVAC Contractors in Theresa

Theresa, NY, experiences a humid continental climate with very cold, snowy winters and warm, humid summers. This creates a high, year-round demand for reliable HVAC services. Residents prioritize robust heating systems (furnaces, boilers) for winter survival and efficient air conditioning for summer comfort. The local market is competitive among a small number of providers, with a strong emphasis on emergency repair services, system reliability, and energy efficiency to manage high utility costs. Expertise in servicing both newer high-efficiency systems and older units in historic homes is a key differentiator.

High Ratings

4.7+ star average from verified customer reviews

Fully Licensed

All contractors are properly licensed and insured

Proven Experience

10+ years average experience in the industry

Local Experts

Familiar with Theresa regulations and climate

Frequently Asked Questions About HVAC in Theresa

Get answers to common questions about hvac services in Theresa, New York.

1What is the typical cost range for replacing a furnace or central air conditioning system in Theresa, NY?

For a full system replacement in Theresa, homeowners can typically expect to pay between $5,000 and $12,000, depending on the system's efficiency, size (capacity), and complexity of installation. Our cold Northern New York winters and humid summers make proper sizing and high-efficiency equipment (like a 96% AFUE furnace or a 16+ SEER AC) a valuable investment for long-term comfort and energy savings, which can influence the upfront cost.

2When is the best time to schedule HVAC maintenance or replacement in Theresa?

The ideal times are during the shoulder seasons—late spring (April-May) for AC service and early fall (September-October) for furnace service. Scheduling during these periods ensures your system is ready for Theresa's extreme seasons and helps you avoid the high-demand rush in summer and winter, which can lead to longer wait times and potential emergency service fees.

3Are there any local regulations or rebates in Theresa I should know about for HVAC work?

While Theresa follows New York State building and mechanical codes, a key local consideration is that all HVAC contractors must be licensed by Jefferson County. Furthermore, homeowners should inquire about NYSERDA (New York State Energy Research and Development Authority) rebates, which are often available for installing high-efficiency heat pumps or furnaces, helping offset costs while improving home energy performance.

4How do I choose a reliable HVAC contractor in the Theresa area?

Look for a locally established, licensed, and insured contractor with strong references from Theresa or nearby communities like Philadelphia or Evans Mills. A reputable provider will perform a detailed Manual J load calculation specific to our climate to correctly size your system, offer clear written estimates, and provide warranties on both labor and equipment. Checking online reviews and their standing with the BBB is also recommended.

5My heat pump seems inefficient during our coldest weeks. Is this normal for Theresa's climate?

Yes, this is a common concern. While air-source heat pumps are efficient, their capacity drops during sub-freezing temperatures common in Theresa's January and February. Many local homeowners opt for a dual-fuel or hybrid system, which pairs a heat pump with a gas or propane furnace. The heat pump handles moderate cold, and the furnace takes over during extreme cold snaps, providing optimal efficiency and reliability year-round.