- HEP Heat and Air
- Certified Technicians

Certified Technicians
Certified Technicians | Thermostat Upgrades | Heating and Air Conditioning | Greeneville
When East Tennessee temperatures swing from frosty mornings to sweltering afternoons, the right thermostat makes all the difference. HEP’s certified heating and air conditioning technicians in Greeneville specialize in thermostat upgrades that turn inconsistent comfort into precision-controlled bliss. We’ll assess your current system, recommend smart or programmable models that match your lifestyle, and install them to factory specifications—so every room feels just right while your energy bills shrink.
Our team handles everything from seamless Wi-Fi integration to personalized scheduling tutorials, ensuring you get the full benefit of modern climate control technology. Backed by transparent pricing, industry-leading warranties, and HEP’s “Happy, Energetic People” customer service, your new thermostat will quickly pay for itself in convenience and savings. Contact us today and discover how effortless comfort can be.
FAQs
Why should I upgrade my old thermostat instead of keeping the one I already have?
Older mechanical or non-programmable thermostats regulate temperature with simple on/off cycling, which can waste energy and provide uneven comfort. A modern programmable or Wi-Fi smart thermostat offers precise digital temperature control, learning algorithms, remote access from your phone, and energy-use reports. In Greeneville’s four-season climate, those features translate into fewer temperature swings, lower monthly utility bills (often 10-20 %), and longer HVAC life because the system cycles less frequently. Certified technicians also verify correct placement and wiring during an upgrade, eliminating the calibration errors common to aging thermostats.
What thermostat brands and models do your certified technicians recommend for Greeneville homes?
We carry and install leading ENERGY STAR® smart thermostats such as the ecobee Smart Thermostat Premium, Google Nest Learning Thermostat (3rd Gen), and the Honeywell Home T10 Pro. These models are reliable in our region’s humid summers and cool winters, integrate with popular voice assistants, and support advanced features like humidity control and geofencing. For homeowners who prefer a simpler interface, we also stock programmable digital thermostats like the Honeywell VisionPRO 8000. Our technicians will evaluate your HVAC equipment, electrical system, and connectivity needs before recommending the best fit.
How much does a professional thermostat upgrade cost and what does the service include?
Typical pricing in Greeneville ranges from $275–$475 for a standard smart thermostat upgrade, which includes the thermostat itself, installation labor by a certified technician, removal and responsible disposal of the old unit, wiring checks, system calibration, Wi-Fi setup, and a brief homeowner tutorial. Complex jobs—such as adding a C-wire, relocating the thermostat, or integrating multi-zone HVAC—may add $50–$150. We provide upfront, itemized quotes, and we’ll help you apply for any applicable TVA EnergyRight® rebates.
Will a new smart thermostat be compatible with my existing heating and air conditioning system?
In the vast majority of cases, yes. Modern smart thermostats support conventional gas or electric furnaces, heat pumps, dual-fuel systems, and even multi-stage equipment. During our complimentary pre-installation inspection, a certified technician will examine your control board, confirm voltage (24 V low-voltage vs. line-voltage), and check for an available C-wire. If a C-wire is missing, we can usually add one or install a power extender kit during the same visit to ensure full functionality without compromising warranty coverage.
Can upgrading my thermostat really lower my energy bills in Greeneville’s climate?
Absolutely. TVA studies show that households using properly programmed smart thermostats save an average of 8 % on heating and 15 % on cooling costs annually. Greeneville’s climate sees 1,900+ cooling degree days and 3,100+ heating degree days per year, so the savings add up quickly. Features such as adaptive recovery, humidity optimization, and geofencing keep comfort high while trimming run time. Many local customers recoup their investment within the first 18–24 months.
What should I expect on installation day and how long does the process take?
A standard thermostat upgrade takes about 60–90 minutes. Our technician will: 1) shut off power to your HVAC system; 2) remove the old thermostat and backplate; 3) verify and label existing wires; 4) install the new backplate and level it; 5) complete wiring and attach the thermostat; 6) restore power, update firmware, and run a system test; and 7) connect the device to your Wi-Fi network, walk you through the app, and program your initial schedule. We always wear shoe covers, use drop cloths, and leave the workspace clean. If additional wiring or drilling is required, the visit may extend to two hours, but you’ll know beforehand.