About Klaus & Sons Construction Klaus & Sons Construction was founded in Upland in 1973, and we’ve been providing heating and cooling services in the area ever since. We have a professional, knowledgeable and fully trained staff, so you can trust in the quality of our work. We’re committed to getting the job done quickly – and correctly – 100% of the time. We strive to serve our community with pride and ensure the best customer service possible. Whether it’s something HVAC related or drain cleaning, electrical, attic insulation or bath room remodeling, we have you covered. We carry innovative, high-end Lennox® products that will help your HVAC systems run more efficiently and more reliably than the competition. Pair high-technology products with our outstanding repair and maintenance service, and you’ve found a match made in HVAC heaven. Our friendly technicians make repair challenges look easy – so you’ll be able to get back to a relaxing and comfortable home in no time. Your whole-home comfort is our priority. That’s why we’ve been lucky enough to be run by our third generation and still going strong. At Klaus & Sons Construction, we are customer focused and offer 24-hour service is right here in Upland to meet your heating and cooling service and product replacement needs. Give us a call at 909-982-5698 or schedule an appointment online to learn more how you can stay Efficient and Way Cool.