Whether you’re confronted with a minor maintenance issue, safety concern, or system failure, don’t hesitate to call 303-678-5576 for expert assistance. 24/7 Emergency Service allows you to get the help you need, whenever you need it. For all repairs, we prioritize your best interests, providing the information, cost-effective recommendations, and honest answers that add up to greater value for your investment. Our experienced HVAC specialists are familiar with all makes and models, and focus on repairs that enhance the reliability and performance of your equipment. When the job is complete, rest assured there will be no mess, damage, or discarded debris for you to deal with, and your furnace will be ready to meet demand. At Welzig Heating & Air, we build on a reputation for excellence each time we answer a call for repair across Boulder, Longmont, Louisville, Lafayette, CO & more.

As the largest heating company in the Northwest, Washington Energy Services has fixed thousands of heating systems. We service most major brands of heating equipment, including York, Bryant, Carrier, Lennox, Coleman and Rheem. Our NATE certified, factory trained service technicians are standing by for furnace service, and also heat pump and air conditioning repair. Home owners from Sea-Tac to Lynnwood trust Washington Energy Services for furnace service and repair. Schedule your service today!


We are famous for being honest and committed with high quality and value to 100% customer satisfaction 7 days a week especially since furnace repair in Denver is popular. The company is generally proud to comment that “All our specialists are drug tested and background checked.” It is also rare and interesting to comment that the techs use shoe covers and floor mats to keep all homes the same way they found them. You won’t find an equal level of commitment that our technicians provide clients anywhere else.
Moreover, our HVAC technicians also offer professional heating repair and maintenance as part of our heating systems service in Federal Way, WA. Whether you find yourself with insufficient heat or a high energy bill, it’s worth keeping a close watch on your heating system, whether you have a furnace or a heat pump. We can keep your heating system in good shape with maintenance.

We are committed to providing you with services that are effective and efficient. We do the job right the first time, but more importantly, we won't charge our customer when we didn’t fix it the first time. For almost 30 years, we have been providing our customers with work from industry-certified technicians. Our team has the skill and knowledge to get the job done right the first time out!


Environmental Protection Agency (EPA) has selected Sears Home Services as a 2018 ENERGY STAR Partner of the Year winner for Sustained Excellence — Retailer and Energy Management. This award is reserved for ENERGY STAR partners demonstrating outstanding leadership and exceptional commitment to the environment by providing consumers with products, services and information that help individuals make sustainable purchasing decisions.
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High-efficiency condensing furnaces (90% AFUE and above) are a bit more complex than conventional furnaces. The main differences between a conventional and condensing furnace is the heat exchanger technology used to extract heat from the combustion process and the method used to exhaust the combustion gases. In these ways, the furnaces are very different. The condensing furnace does not have a significantly more efficient combustion process than does a conventional furnace; both use gas burners with electronic ignition. The difference lies in that the condensing furnace has a more efficient heat extraction process after combustion.
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