![Internal Header Water Heaters E1494956999260](/sites/default/files/migrated/featured/internal-header-water-heaters-e1494956999260.jpg?alternateWidths=/sites/default/files/styles/canvas_parametrized_width--%7Bwidth%7D/public/migrated/featured/internal-header-water-heaters-e1494956999260.jpg.avif%3Fitok%3DNYiDU5cV) # Commercial Solar Water Heaters For buildings that use hot water all day, every day, solar thermal can supply a large share of the load and let the gas or electric heater do the rest. Book in under 2 minutes Pick a service and a time that works for you. Plumbing Heating Air Electric Continue Prefer to talk? [Call (877) 325-0180](tel:8773250180) ## Breadcrumb 1. [Home](/) 2. Commercial Solar Water Heaters ## How commercial solar water heating works Roof-mounted collectors heat a fluid that transfers its heat to a storage tank. The building draws from that pre-heated storage, and the existing water heater or boiler only tops up the temperature. On a North Carolina roof the collectors do most of the work for much of the year, and the backup heater carries the load on cloudy days and at night. Solar thermal suits loads that are steady and large: hotels, laundries, car washes, multifamily buildings, athletic facilities, food processing and healthcare. It suits them far less when the load is small or intermittent, and we will say so. ## What Progressive provides - Load analysis and system sizing against your actual hot water use. - Collector, storage and heat-exchanger design, integrated with your existing [boiler](/commercial/plumbing/water-heaters/boilers) or [water heater](/commercial/plumbing/water-heaters/high-efficiency) as backup. - Installation by licensed plumbers with the roof, structural and electrical work coordinated under one contract. - Freeze protection, controls, and scheduled maintenance of the glycol loop and collectors. ## Frequently asked questions Does solar water heating work in the winter?Yes. Output is lower on short cloudy days, which is why every commercial system keeps a conventional backup heater in the loop. The system is designed for annual savings, not for any single day. What incentives are available?Federal and state incentives for solar thermal change over time. We identify what applies when we quote the project and show the payback with and without incentives. Can solar be added to an existing water heating system?In most cases, yes. Solar pre-heats the water and the existing heater or boiler becomes the backup. **Call (877) 325-0180** or [request a proposal](/contact). Commercial plumbing crews are on call 24/7 across Raleigh, Durham and the Triangle. [ High-Efficiency Commercial Water Heaters If your building runs hot water all day, the fuel bill is the real cost of the heater. Condensing high-efficiency units recover heat that older systems send up the flue. Learn more →](/commercial/plumbing/water-heaters/high-efficiency)[ Commercial Hot Water Boilers For large buildings, a boiler feeding storage tanks is often the most reliable way to deliver domestic hot water. Progressive designs, installs and services these systems as part of our commercial water heating specialty. Learn more →](/commercial/plumbing/water-heaters/boilers)[ Commercial Water Heaters Hot water is not optional in a restaurant, hotel, clinic or apartment building. Progressive has specialized in commercial water heaters since 1983: sizing, installation, repair, maintenance agreements and same-day replacement, with temporary units when you cannot wait. Learn more →](/commercial/plumbing/water-heaters) ### Need an expert today? Same-day service. Flat-rate pricing. Licensed, background-checked technicians. [Call (877) 325-0180](tel:8773250180) [Book Online Now](/webform/book_online/share) ### Facility down? We answer 24/7. Commercial plumbing, HVAC and electrical crews under one roof. Emergency response any hour; maintenance agreements that prevent the next call. [Call (877) 325-0180](tel:8773250180) [Book Online Now](/webform/book_online/share) ### Commercial Plumbing Services - [Water Heaters](/commercial/plumbing/water-heaters) - [Pipe Lining](/commercial/plumbing/pipe-lining) - [Backflow Certification](/commercial/plumbing/backflow-device-certification) - [Sewer Main Repair](/commercial/plumbing/sewer-mains) - [Drain Cleaning](/commercial/plumbing/drain-cleaning) - [Grease Traps](/commercial/plumbing/grease-traps) - [All Commercial Plumbing →](/commercial/plumbing) View more (3) Special offer ### Financing available! Comfort now, pay later. [See details](/promotions) Maintenance agreements ### Scheduled service keeps your building off the emergency list Planned HVAC, plumbing and electrical maintenance for facilities, property managers and businesses. [Ask about an agreement](/contact) Reviews ## Trusted by your neighbors - Review from T. Craig D., Chapel Hill T. Craig D., Chapel Hill ★★★★★ I just wanted to send a note thanking Dwayne Sandy for his careful work while installing my water line and interior plumbing fixtures. … Many thanks for the timely and professional work. - Review from Joshua N. Joshua N. ★★★★★ These two gentlemen in my opinion are great assets to your organization and represent it well. We look forward to a continued relationship with Progressive for all our plumbing needs. - Review from Bhanu Das Bhanu Das ★★★★★ Joe Oliveira stopped by my home, took time to understand the problem that I was having with the unit, went back and discussed the issue with his team of experts and had a detailed work order sent to me with in a day. … Based on the experience that I have had with Progressive Plumbing, Heating & Air, Electrical, I will HIGHLY recommend them for HVAC install and maintenance. ## Serving the Triangle and beyond [All service areas →](/service-areas) - [Apex](/service-areas/apex) - [Cary](/service-areas/cary) - [Chapel Hill](/service-areas/chapel-hill) - [Clayton](/service-areas/clayton) - [Durham](/service-areas/durham) - [Fuquay-Varina](/service-areas/fuquay-varina) - [Garner](/service-areas/garner) - [Holly Springs](/service-areas/holly-springs) - [Knightdale](/service-areas/knightdale) - [Morrisville](/service-areas/morrisville) - [Raleigh](/service-areas/raleigh) - [Rolesville](/service-areas/rolesville) - [Wake Forest](/service-areas/wake-forest) - [Wendell](/service-areas/wendell) - [Zebulon](/service-areas/zebulon) ## Day or night, call Progressive. 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