Commercial HVAC Installation & Design-Build Services in the Pacific Northwest
TSS HVAC is your full-service partner for commercial HVAC design-build and installation. We deliver custom, energy-efficient systems for properties ranging from 3,000 to 500,000 square feet. Since 1985, businesses across the Pacific Northwest have trusted our team for precise planning, expert engineering, and flawless execution; on time and within budget.
Why Choose TSS HVAC?
Human Support - Always
Real people, 24/7 - no phone trees.
Full Project Lifecycle Support
From design to install, our in-house team handles everything.
HVAC Design-Build
At TSS HVAC, our design-build approach combines HVAC engineering, construction, and installation into one streamlined process. This method simplifies coordination, shortens project timelines, and gives you a single point of accountability from first concept to final commissioning.
More importantly, it sets the foundation for energy-efficient system design from the start. We engineer solutions that align with your performance needs, operational goals, and sustainability standards delivering HVAC systems that are built to perform, built to last, and built to lower your energy costs.
Commercial HVAC Installation & Project Services
System Retrofits & Replacements
New Construction & Major Projects
Commercial cooling is about more than just lowering the temperature; it’s about maintaining air quality and managing humidity in high-traffic environments.
- Variable Refrigerant Flow (VRF): High-efficiency cooling that allows for zoned temperature control across different office sections.
- Rooftop Units (RTU): Space-saving, all-in-one cooling solutions ideal for retail and industrial footprints.
- Data Center Cooling: Specialized precision cooling to protect your most sensitive hardware from heat-related failure.
- Commercial Heat Pumps: Sustainable heating that extracts ambient heat from the air or ground to warm your facility efficiently.
- High-Output Furnaces: Reliable, high-AFUE gas furnaces designed for rapid heating in large, open-concept spaces.
- Boiler Systems: Specialized hydronic heating for consistent, quiet warmth in multi-unit complexes or older infrastructure.
Commercial AC & Heating Installation
- Tailored Cooling: Precision AC for your specific layout.
- Efficient Heating: Furnace and heat pump systems built for PNW winters.
- Transparent Recommendations: Budget-friendly options with no hidden fees.
Energy Efficiency Project Development & Financing
Through our partnership with Climate Efficiency Partners (CEP), we offer performance-based financing for energy upgrades; ideal for ESG-conscious clients.
Benefits for Your Business
Zero Upfront Costs
- Projects financed through energy savings.
Lower Operating Expenses
- High-efficiency systems cut utility bills by 10%–21%, or $0.10–$0.20 per square foot.
Trackable ESG Progress
- Emissions reductions and energy reports built into the service.
Future-Ready Systems
- Smart controls and sustainability baked in from the start.
About Plan & Spec Services
Types of Systems We Install
Single-Split Systems
Ideal for small spaces – one outdoor unit, one indoor unit.
Multi-Split Systems
Rooftop Units (RTUs)
Hybrid Split Systems
30+ Years of Excellence in Commercial HVAC Installation
Since 1985, businesses across the Pacific Northwest have relied on us as their commercial HVAC installation contractors. Our NATE-certified technicians deliver fast, dependable service that keeps systems running efficiently. With long-standing industry affiliations and partnerships with leading brands, we’ve built a reputation for excellence that stands the test of time.
Idaho, Portland, & Seattle
Companies We Support





















Your Reliable Commercial HVAC Team in the Pacific Northwest
Total System Services is one of the most well-established heating, ventilation, and air conditioning service companies in the Pacific Northwest. We offer commercial and governmental HVAC repairs, maintenance, and installation in Idaho, Oregon, and Washington.