Residential Heating, Ventilation, & Cooling Services

Proudly Serving Customers in Walla Walla, WA & Beyond

Grassi Refrigeration has provided premium HVAC services in Walla Walla, WA, and surrounding communities for over five decades. We are proud to serve both residential and commercial  heating, cooling, ventilation, and irrigation pump clients across the Valley. As one of the area’s premier heating and air conditioning contractors, we are committed to quality services and customer service for you and your family.

We offer a wide range of heating and cooling services to meet your individual comfort needs. Our company is family-owned and operated and is an authorized dealer of Carrier products. Our technicians are factory-trained to ensure you receive the best product installation, service, and repair. We service all makes and models of heating, cooling, and ventilation systems. We are dedicated to keeping your home comfortable year-round and improving its energy efficiency.

Products and Services

Grassi Refrigeration offers HVAC products and services including:

Home Comfort Systems

We are proud to be a dealer for a full line of Carrier Home Comfort Systems. Our trained staff will work with you to find the unit that best suits your home and your comfort needs. Our goal is to make sure you are comfortable year-round. We will design a comprehensive system that satisfies all your needs, including heating, cooling, air filtration, humidification, zoning, and more.


We are proud to service every make, model, and type of heating system. We provide a full range of heating services including new product installation, heating repair, and preventive maintenance services. From oil and gas furnaces to fan coil unit installation and repair, we are proud to carry and maintain a full line of products. Together with you, our heating technicians will help you find the products and service packages that help you stay comfortable in your home, year-round. In addition, we can help you make your heating systems more energy-efficient.

Heat Pumps

A heat pump is a hybrid creation: it provides both heating and cooling benefits. Heat pumps utilize the heat in outdoor air in order to heat your home, and provide customers with greater control over their fuel choices. By including a heat pump in your heating system, you have the option of electricity-fueled heating and cooling, in addition to gas furnace heat. Heat pumps are cost-effective and extremely efficient—at 300% efficiency, you can’t go wrong! Plus, it allows you to heat your home in the winter and cool it in the summer using the same system.

Cooling Services

Grassi Refrigeration carries a full line of air conditioning products to satisfy all of your home cooling needs. This includes central air conditioning units, ductless air conditioners, and fan coil units. Our HVAC technicians have the knowledge and experience to repair, service, and maintain all types of cooling units, and will work with you to ensure you have the product to fit your needs. We supply cooling services to both existing homes and new construction projects. No matter if you live in an apartment or full house our goal is to help you live comfortably in your home while improving its energy efficiency and reducing your energy bills.


A thermostat is used to regulate the temperature of your home heating and cooling systems. As with all of our HVAC services, we offer sales, repair, and maintenance of thermostat units. Upgrading to a programmable thermostat can help increase your home’s energy efficiency. Our technicians will work with you to determine which type of thermostat is compatible with your HVAC system.

Ventilation & Ductwork

Ventilation and ductwork installation go hand-in-hand with the installation of furnaces and air conditioning systems. We offer the design and installation of ductwork systems in residential and commercial structures on a case-by-case basis. We have our own sheet metal shop and warehouse, enabling us to customize our work to the customer and to stock the most commonly used materials and equipment.

Air quality and ventilation are extremely important to a healthy living or working environment. We carry a selection of top-quality heat recovery and ventilation systems. These units pass fresh, outside air through a heat exchanger and into your home, while the old, stale air is passed through the other side of the heat exchanger, transferring energy to the incoming air. This creates a continuous supply of fresh air, purposefully distributed throughout your home. The air can be passed through a highly efficient cleaner to ensure air quality.

Fireplaces & Free Standing Stoves

Adding a fireplace or freestanding stove into your home can increase its energy efficiency, as well as add value to your home. We carry a variety of gas, electric, and propane fireplaces and will help you find the perfect unit to match your home, style, budget, and heating needs. Grassi offers the largest selection of clean-burning, high-efficiency hearth products in Walla Walla.


An air filter plays a vital role in your home’s forced air HVAC system. The air filter cleans the air and removes bacteria and harmful particles. Improving your home’s filtration system is an important first step in improving indoor air quality. Regularly changing your filters also helps your air conditioner and furnace stay cleaner and operate more efficiently. Our pleated, MERV-rated filters are made using Kimberly-Clark cotton-poly blended media and are tested according to ASHRAE standards. Our air conditioning filters and furnace filters are made with heavy-duty beverage board frames to prevent airflow bypass.

Contact us today to learn more about our Filter Loyalty Club!

Financing Options

Planned Service Agreements & Preventive Maintenance

Routine, preventive maintenance is essential to the proper function of air conditioning and heating equipment. Without regular maintenance, your HVAC system may require extensive and costly repairs down the line.

Studies show with regular tune-ups, a unit will maintain up to 95% of its original efficiency. For our customers, this means the cost of an annual tune-up is recovered in the amount you save on your monthly energy bills and reduced repair costs. With proper maintenance and service, your air conditioner will also do a better job of dehumidifying your home.

Peace of Mind

By regularly adjusting and cleaning your heating and cooling systems, we can keep them running at their peak efficiency. In addition, periodic inspections can help us identify potential problems before they become larger issues.

Competent Experts at Your Service

Our HVAC technicians and staff are dependable and factory-trained to ensure your equipment is properly maintained and serviced. We will work with you to schedule service calls that are convenient and easily fit into your busy schedule.

Priority Treatment

Enrolling in a Planned Service Agreement can increase your system reliability but also entitles you to priority treatment in the event of a heating or cooling emergency.


If you move to a new home in the area, you can take your Planned Service Agreement with you.

Price Protection

Your agreement price cannot be raised during the effective dates. In addition, you will receive a 10% discount on parts and labor for needed repairs and will not be charged overtime for after-hours calls.

Price Protection

Your agreement price cannot be raised during the effective dates. In addition, you will receive a 10% discount on parts and labor for needed repairs and will not be charged overtime for after-hours calls.

For more information or to schedule commercial HVAC services in Walla Walla, WA, please contact Grassi Refrigeration at 509-529-9700. We look forward to working with you!

Business Hours:
Monday - Friday: 7:30 am - 4:00 pm

Phone: 509-529-9700
Fax: 509-525-3666

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Heating & Cooling Contractor in Walla Walla WA | Grassi Refrigeration