Commercial Heating, Ventilation & Air Conditioning Services

Quality Services Across the Walla Walla Valley Since 1958

Grassi Refrigeration in Walla Walla, WA is proud to serve area businesses with a range of commercial heating, cooling, refrigeration, and ventilation services. Since 1958, we have been a trusted name in HVAC repair, service, and installation. As a family-owned and operated company, we are dedicated to providing our customers with services they can count on.

Throughout the years, Grassi has been recognized as a top provider of HVAC services across the Walla Walla Valley. In addition to our residential heating and cooling, commercial applications are a large part of our ongoing services. We strive to deliver consistent quality service to a variety of commercial clients including developers, property managers, building owners, designers, and more.

Trusted Commercial HVAC Services

Our team of HVAC technicians have the skills and experience to maintain your existing HVAC systems, retrofit your office building, or work with contractors to provide custom design/build services. From beginning to end, we provide thorough design/build, installation, and maintenance services. We know the right design, construction, and maintenance can make a huge difference in the cost of operating a business.

We provide HVAC system installation, repair, and maintenance service to:





Office Buildings


Retail Buildings

Industrial Sites


And various other applications

Products and Services


No matter what type of heating system your business features, we have the skills and experience to handle all of your repair, maintenance, and heating installation needs. From gas and oil furnaces to fan coil unit repair and installation, we carry and maintain a full line of Carrier products. Our technicians will work with you to find the products and service packages to keep your business or office comfortable for both your employees and customers. Helping you increase the energy efficiency (Link to FAQ) of your commercial HVAC system is also a top priority for us.

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

We are proud to carry a full line of air conditioning products to satisfy all of your commercial cooling needs. Our goal is to help you, your employees, and your customers stay comfortable while reducing your commercial energy bills. Our HVAC technicians and installers service, maintain, and repair all types of cooling units including central air conditioning, fan coil units, and ductless air conditioners. We will work with you to ensure you have the products and applications to fit your needs. We supply cooling services to both existing commercial buildings and new construction projects.


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 commercial building’s energy efficiency. Our technicians will work with you to determine which type of thermostat is compatible with your current HVAC system.

Ventilation & Ductwork

Ventilation and ductwork installation goes 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 office, 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.

Commercial Refrigeration

Grassi Refrigeration is dedicated to meeting your business’s commercial cooling and refrigeration needs. We will work with you to determine what refrigeration units best match your needs and budget. We are committed to quality installation, repair, and maintenance of commercial refrigeration systems. Our technicians have the skills and experience to handle any application, routine repair, or emergency service.

Grassi Refrigeration HVAC Products and Services

Grassi Refrigeration HVAC Products and Services

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 commercial 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.

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