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Frequently
Asked Questions

When you’ve got questions, we’ve got answers. At Intertherm, we strive to help homeowners like you make the right choice for their homes, right from the start. That’s why we’ve gathered answers to some common customer questions for you below.

Warranty

How do I register my warranty?

You can register your warranty here or visit our warranty page for full details about coverage on all Intertherm products.

How do I file a warranty claim?

A warranty claim is filed by your service repair technician with their distributor. To file a claim, your service repair technician will need your information: name, address, phone number, serial numbers, install/service date, and defective part number.

How long is the warranty coverage?

Most Intertherm products enjoy a standard 1-year warranty right out of the box. However, you can easily extend that coverage by registering your products. The length of time covered by the extended warranty will depend on the product(s) registered. Contact our team if you have further questions.

What does my warranty cover?
The Manufacturer Parts Warranty begins on the date of installation and covers defective parts. All products have a base warranty for parts. Depending on the brand, your warranty could include a labor allowance. Ask your service technician to assist with warranty confirmation and coverage.
What isn’t covered under the warranty?

Equipment ordered from anywhere other than the manufacturer or an authorized dealer is not covered under warranty. Additionally, equipment not matched per the manufacturer’s recommendations may not be covered. For a full list of warranty exclusions, refer to our full warranty statement.

What parts are covered under the warranty?

Our limited parts warranty covers different parts for different durations based on your specific equipment. For more information on specific parts covered, click here.

How can I register my product?

You will need a serial number for each unit that was installed. You must register your products within sixty days of installation or occupancy for an extended warranty. There is no cost to register. You can find the serial number on the unit or contact your service installer for the information. Our product serial numbers begin with a letter and they are thirteen digits long. You can register your product here.

Products

What are the key components of an Intertherm integrated HVAC system?
The key components of an Intertherm integrated HVAC system are the coil, furnace, and condensing unit.
How do I know which product(s) are right for my home?

To find out which product(s) are right for your home, use our product selector tool, speak with a contractor, or visit an authorized Intertherm dealer.

How does an air conditioner work?
Warm air from inside your home is drawn in and blown over a cold evaporator coil where the heat is absorbed by refrigerant. The cooled air is then circulated back into your home as heated evaporated gas is passed through a compressor.
How does a heat pump work?
Heat pumps extract heat from a cool space and move it to a warmer space. These devices can be used to heat your home in winter or cool it in the summer with the reverse process.
How does a furnace work?
Furnaces work by drawing in cool air, heating it, and then recirculating warm air around your home. Furnaces can be powered by gas, oil, or electricity.
What is a split system?
A split HVAC system is a heating or cooling system that uses both interior and exterior components in conjunction to control the temperature in your home.
What is the difference between an air conditioner and a heat pump?

While air conditioners are designed specifically to cool your home, heat pumps are built with capabilities that reverse the process in order to heat your home. To find the right equipment for your needs, use our product selector tool.

What is SEER?
SEER stands for Seasonal Energy Efficiency Ratio. A SEER rating measures how efficient a cooling system is by evaluating its cooling output in relation to the electricity it consumes over a specific period, typically a season. In 2023 the tests used to calculate seasonal efficiency were changed by the Department of Energy. Because the results of the new tests are not directly comparable to the results of the previous tests the efficiency metric was changed from SEER to SEER2. Your service technician can confirm the correct SEER2 rating for your region.
Where can I find my owner’s manual?
Your owner’s manual comes with your equipment at the time of purchase or installation.
Where can I find the serial number?
For furnaces, you can find the serial number on a label inside the equipment. For condensers, the serial number is located on the rating plate on the bottom.
How can I find my warranty information?
Your warranty information can be accessed by entering your unit serial number on our warranty registration page. Our product serial numbers begin with a letter and they are twelve or thirteen digits long. You can find the serial number on the unit or contact your service installer for the information.
How do I leave a review for a product?
To leave a product review, visit the reviews section near the bottom of any of the product pages on this website and click on “Write a Review.” You will also receive an email after purchase with a link to write your own review.

Purchasing/Buying

Where can I buy new and replacement Intertherm products?

Our HVAC equipment is available through a network of authorized dealers and distributors. You can find a dealer near you by using our dealer locator tool or by contacting our team.

Which HVAC system is right for my Home?

You should choose what is most suitable for your home and budget. Consider how various heating and cooling units will influence your indoor temperature, energy consumption and air quality. Discuss these considerations with your service installer and what role your geographic region plays.

How much do Intertherm products cost/how much does an Intertherm system cost?

To determine pricing, reach out to your local contractor, a licensed Intetherm dealer, or contact us directly.

Do you offer financing or rebates?

Intertherm offers rebates on many of our products. To look up more information on rebates you may qualify for, click here for United States rebates or click here for Canadian rebates.

Installation & Maintenance

Do you install HVAC equipment?

While we do not directly install our equipment in homes, we have a network of certified HVAC contractors who are experienced in installing and servicing our systems. You can find a dealer near you by using our dealer locator tool.

Who can install or service my product?
You are welcome to use any service company. Nortek does not have service personnel or preferred service companies, but we do suggest you hire a licensed HVAC technician. Proper installation and maintenance are a large part of the reliability of your system. Choose a company in your area that has the most positive ratings with great customer care service.
What should be included in my installation quote and receipt?
Your quote should include the brand name of the product, the model number(s), the SEER rating, and the unit size (tons or BTU’s) and costs associated with the installation. The date of the installation is day one of warranty. Keep your receipt for proof of warranty and register products that are eligible for extended warranty. Your installation receipt should include the brand name of the product, the serial number(s), the seer rating, the unit size (tons or BTU’s), and the date of installation.
When should I contact a service technician about signs of an HVAC problem?
Contact your service technician when you observe the following issues: bad smells including burning or mold; unusual noises including banging, clanging, buzzing; any and all power issues, including if your unit does not turn on or off or it turns on and off too quickly. It is normal for your unit to run for extended periods of time on hot days.
Is any kind of maintenance required for Intertherm HVAC equipment?
To properly maintain your equipment, a filter change is suggested every six months, along with annual service (inspection and cleaning) by a licensed technician. This ensures top performance, safety, and product longevity.
Air Filters: What size, lifespan, and airflow?
An air filter is a necessary part of your HVAC system that removes any air impurities to protect your furnace – specifically the blower fan – from all the dust, debris, and other pollutants the return duct takes in. It’s important to replace or clean the filters regularly. There are many assorted styles of filters which affect the timeline to replace or clean your filter. We suggest a high-velocity filter. Many factors are considered when choosing the right filter – your service technician is the best resource to properly access the size, lifespan, and proper airflow.
What should I do if my system needs repairs?

If and when your system needs repairs, contact a contractor in your area. To learn more about our Extended Labor Program that could help you save on repairs, click here.

Where can I find parts for my unit?
Intertherm sells at a wholesale level to distributors. Most parts require a licensed technician for purchase. Your service technician can obtain parts at a local distributor.
Why is there ice on my unit?
There are many reasons your air conditioner will ice up. It could be due to insufficient airflow across the evaporator coil. Without proper heat exchange, the evaporator coil will freeze. This may require you to check your air filter. Other reasons include a low refrigerant level, dirty evaporator coil, or mechanical failures like a defective motor or relay. Contact a service technician for proper assistance.

Glossary of HVAC Terms

HVAC
An acronym that stands for Heating, Ventilation, and Air Conditioning. HVAC systems control and move heated and cooled air in homes and buildings. HVAC systems can also filter and clean indoor air, and maintain humidity levels.
Split System
A split HVAC system is a heating or cooling system that uses both interior and exterior components in conjunction to control the temperature in your home.
Air Conditioner
A system that is used to cool down a space by removing heat from the space and moving it to an outside area. The cool air can then move throughout a building via ventilation.
Heat Pump
A device that uses electricity to move heat from one place to another, providing heating and cooling for homes and buildings. Heat pumps are an energy-efficient alternative to air conditioners and furnaces and can be used in any climate.
Ultra Side Discharge
A type of heat pump system that expels air horizontally from the side of its outdoor unit, rather than vertically from the top like traditional HVAC systems.
Mini-split
Also known as a ductless heat pump or mini-split AC, a mini-split is a type of air conditioning system that can heat and cool individual rooms or spaces in homes or buildings without the need for ductwork.
Condenser Coil
A heat exchanger component placed within an air conditioning unit that helps keep a home cool by removing hot air and transferring it outside.
Evaporator Coil
A component that absorbs heat and moisture from the air inside your home, and works with the condenser coil to produce cool air. It’s usually located inside the air handler or attached to the furnace.
Air Handler
A large metal box that’s installed inside the home and works with both the air conditioner and heat pump to circulate warm or cool air throughout a home.
Heat Exchanger
A system that transfers heat between a source and a working fluid, and is used in both heating and cooling processes.
Compressor
A vital component of an air conditioning or heating system that compresses and pumps refrigerant to circulate through the system and remove heat from the air. Also referred to as the “heart” of an HVAC system.
SEER2
An acronym that stands for Seasonal Energy Efficiency Ration 2. SEER2 is a rating that measures the cooling efficiency of air conditioners and heat pumps. Calculated by dividing the cooling output in BTUs by the electrical energy input in watt-hours.
AFUE
An acronym that stands for Annual Fuel Utilization AFUE is a rating that measures how efficiently a furnace or boiler converts fuel into heat over the course of a year.
Energy Star
ENERGY STAR® is a certification that identifies HVAC products meeting energy efficiency guidelines set by the U.S. Environmental Protection Agency (EPA). HVAC systems that carry the ENERGY STAR label are designed to help homeowners reduce energy consumption, lower utility bills, and minimize environmental impact.
Refrigerant
A chemical substance that absorbs heat and transfers it to cool air in air conditioning systems.
A2L

An A2L refrigerant is a type of refrigerant that is classified as non-toxic (“A”) and mildly flammable (“2L”). It is part of a newer generation of refrigerants designed to have a lower environmental impact, particularly by reducing global warming potential (GWP). R454B is Intertherm’s selected A2L refrigerant that will be used in all new products for factory-built homes.

Ductwork
A system or network of ducts responsible for circulating the air around your home.
Ductless System
A heating and cooling system that doesn’t use ductwork. These systems are made up of individual units that are mounted on the walls or ceiling of each room and connected to an outdoor unit by a refrigerant line. The outdoor unit extracts heat from the air and the indoor unit blows the heated or cooled air into the room.
Capacity
Refers to the maximum output of a heating or cooling system, or how well it can heat or cool a given space.
BTUH (British Thermal Units per Hour)
A measurement used to quantify the amount of heat an HVAC system can add or remove from the air in an hour and determine the heating or cooling capacity of the system. The higher the BTUH rating, the more heat the system can transfer in a given time.
Ton
Another unit of measurement for cooling capacity. One ton equals 12,000 BTUH. So while BTUH measures heat transfer per hour, a ton is a larger unit typically used to describe the overall cooling capacity of an HVAC system.
Load Calculation
An analysis that determines the heating and cooling needs of a building. This helps determine the right size of HVAC equipment needed to keep the interior temperature comfortable while using the least amount of energy possible.
AHRI Certification
This certification by the Air Conditioning, Heating, and Refrigeration Institute provides an evaluation of the heating, water heating, ventilation, air conditioning, and commercial refrigeration performance of equipment as advertised by their manufacturers.
Air Filter
An essential component of an HVAC system that cleans the air before it enters the system.
Indoor Air Quality (IAQ)
The quality of air inside homes and buildings, and how it can affect people’s health, comfort, and ability to live or work.
Factory-Built Housing
An umbrella term used to describe the type of prefabricated housing that is constructed in a factory and then transported to a site for installation.
Manufactured Home
A type of prefabricated housing that is constructed in a factory and then transported to a site for permanent installation. They are constructed on a permanent chassis, allowing them to be moved if needed. Manufactured homes have to meet building standards set by the U.S. Department of Housing and Urban Development (HUD).
Modular Home
A type of prefabricated home that is built in sections in a factory and then transported to a site for assembly and installation. Modular homes are placed on permanent foundations and have to meet the same local building codes as traditional site-built homes.
Tiny Home
A small house or mobile home that’s typically less than 500 square feet and designed to be efficient with space and ergonomics.
Single Room HVAC
A system that can heat and cool a single room or area.
Single-Stage Heating
A type of HVAC system that has one level of heat or cold output. It’s the most common type of HVAC system in the United States and is also known as traditional heating and air conditioning equipment.
Two-Stage Heating
A feature in many heating units and furnaces that allows them to operate at two different heat output levels, depending on the temperature. This feature is designed to save energy by running at a lower output on milder days and a higher output on colder days.