Having trouble with your home heating and cooling or your generator? Jasper residents can always trust the expert team at A+ Derr Heating & Cooling for their home service needs — we’re even available 24/7 for emergency service if you have a problem where a delay could harm your home or your family.
Contact the team at A+ Derr today to schedule HVAC or generator services or to learn more about the services we offer in the Jasper area.

Top-Rated Air Conditioning
If your air conditioner isn’t keeping you affordably cool through the hottest days of the Jasper summer, don’t fret. Superior comfort using the latest technology and habits is just a phone call away. The experts at A+ Derr offer comprehensive air conditioning services to meet your needs and keep you comfortable:
Signs You Need AC Repairs
The sooner you detect a problem with your air conditioner, the less likely you will need a full replacement or major repairs — and the less likely you will suffer through a day without much-needed AC. Reach out to us when you notice your:
- Power bills increasing disproportionately
- Air conditioner struggling to keep you comfortable
- Air conditioner tripping a circuit breaker
We offer services for central air conditioning, ductless mini-splits, and heat pumps, so you can count on A+ Derr however you keep cool.
Trusted Heating Services
Indiana winters can be quite intense on the coldest days of the year. Make sure you’re outfitted for toasty days with the help of the A+ Derr technicians. We offer these heating services for your comfort and convenience:
Signs You Need Heating Repairs
Like your air conditioner, it’s important to detect heating issues quickly — more importantly, as a faulty heating system can seriously threaten safety and property during a cold spell. Reach out to our team as soon as you notice any of these signs of trouble:
- Short-cycling, where your system turns on and off constantly
- Changes in indoor air quality
- Pilot light going out regularly
Our team can help with any system you use to stay warm, including furnaces, heat pumps, boilers, and more.
Indoor Air Quality Solutions
Maintaining healthy, fresh air in your home isn’t just pleasant; it helps keep you comfortable while spending less money, keeps pests and allergens away, and helps you avoid various illnesses. At A+ Derr, our team can help you maintain the perfect indoor air quality for comfort and health with a combination of solutions.
In addition to air purifiers that neutralize or eliminate various compounds and organisms too small for filtration, we can help with humidifiers and dehumidifiers to maintain ideal humidity for your family. Breathe freely in a home protected from contaminants, irritants, and bad odors.
Whole-Home Generator Installation
Tired of having power outages stacked on top of other situations like storms? Worried about your safety due to a loss of lighting, refrigeration, HVAC, or medical equipment? A whole-house generator installed and maintained by the team at A+ Derr could help you enjoy:
- Reliable access to electricity for the equipment that keeps your home safe and secure
- Increased home value through a worthwhile, convenient upgrade
- Easier use and safety compared to portable generators and battery-powered backup options
Why Choose Us?
At A+ Derr Heating & Cooling, we’ve served our community for four generations. We’re available 24/7 for service when you need it most, delivered by experienced technicians and backed by a 100% satisfaction guarantee. If you’re not happy with a product installed by A+ Derr after the first year, we’ll buy it back.
If you’re ready to learn more about our services or want to schedule a visit in Jasper, contact A+ Derr now and speak with a member of our team.Â
Recent Jobs and Reviews in Jasper, IN
Job Locations and Reviews
Responded to install callback for reported water leak and no cooling concern on recently installed HVAC system. Upon arrival, inspected outdoor heat pump unit and verified all refrigerant line connections, service valves, and condensate drainage were secure with no active leaks present. System tested and confirmed operational with proper cooling function restored.
Successfully completed installation of Navien NPE-240A2 tankless natural gas water heater. Unit was properly mounted, connected to existing gas and water supply lines, and vented according to manufacturer specifications. System was tested for proper operation, flow rate, and temperature output to ensure optimal performance and energy efficiency.
Completed full HVAC system installation including a 2.5-ton, 15.5 SEER Bryant air conditioning unit positioned on concrete pad with proper refrigerant line routing, and a 96% efficiency gas furnace installed in interior utility closet with new ductwork connections and PVC venting. All equipment tested and operational, system financed through third-party provider.
# HVAC Complete System Installation Successfully completed installation of a 2-ton, 18 SEER high-efficiency split system for the upstairs zone. The system features a 99% AFUE upflow gas furnace positioned in a narrow utility closet with white brick walls. Installation included proper placement of the furnace unit with manufacturer specifications verified, white PVC condensate drain and vent piping routed vertically from the unit, and silver flexible supply ductwork configured to fit the confined space. Black flexible return ducting was connected to the upper portion of the furnace to complete the air distribution system. Upon completion of the mechanical installation, performed comprehensive system startup and diagnostic testing using digital manifold gauges. Verified refrigerant charge, operating pressures, and temperature differentials across the evaporator coil to ensure optimal system performance. All readings confirmed proper system operation within manufacturer specifications.
# HVAC Install - Complete System Completed full HVAC system installation including 18 SEER heat pump outdoor unit and 99% AFUE gas furnace with air handler to serve main level and basement zones. Installed new furnace unit in basement mechanical room with proper clearances and ventilation requirements. Configured white PVC condensate drain lines with insulation wrap, routing vertically through ceiling joists to appropriate drainage location. Connected silver flexible ductwork from furnace to existing distribution system, ensuring proper sealing and support. Mounted air handler component above furnace with metallic supply ductwork featuring elbow transitions for optimal airflow distribution. Installed black flexible return ductwork to complete air circulation loop. Positioned all equipment to maintain accessibility around existing laundry appliances and storage areas within the utility space. Ran refrigerant lines between indoor and outdoor units with appropriate insulation and secur
Conducted comprehensive water heater estimate in residential basement utility space. Assessed existing plumbing infrastructure including copper supply lines with age-appropriate patina, PVC drainage systems, and current water heater installation location. Evaluated mechanical room conditions, ductwork clearances, and available space for potential tank or tankless water heater replacement, documenting existing pipe configurations and support systems to provide accurate replacement recommendations.
Completed on-site assessment of existing HVAC system for replacement estimate. Documented current furnace installation in basement utility room, including open inspection of internal components, copper coils, wiring, and mechanical systems. Photographed existing equipment configuration showing dark gray/black furnace unit with associated white PVC venting routed to ceiling, metallic duct connections, and surrounding plumbing infrastructure. Recorded measurements and created detailed upflow system schematic diagram showing proposed replacement layout with furnace, coil, and plenum configurations. Documented existing base dimensions at 9x35 on wood flooring in non-deteriorated condition. Captured comprehensive visual documentation of mechanical room environment including galvanized ductwork, ceiling clearances, and available working space for equipment replacement. Provided customer with Green A+ rated replacement system proposal based on current installation parameters and structural me
Responded to no cooling complaint on 20+ year old residential HVAC system with thermostat reading 74°F despite setpoint of 68°F and reported water accumulation at base of unit. Upon arrival, performed comprehensive system diagnostic including visual inspection of both outdoor condenser units and indoor air handler. Confirmed adequate airflow through supply vents and assessed refrigerant lines for proper insulation and potential leak points. Evaluated condensate drain system to identify source of water pooling at equipment base, checking for blockages in drain line and proper pan drainage. Inspected evaporator coil area for ice formation or frost buildup that could indicate airflow restriction or refrigerant issues. Checked electrical connections, capacitor function, and contactor operation on outdoor units. Measured temperature differential across evaporator coil and assessed system superheat and subcooling values to determine refrigerant charge status. Given the age of the system exce
Conducted comprehensive replacement estimate for residential HVAC system experiencing inadequate heating and cooling performance. Evaluated existing Rheem air handler unit located in utility closet, assessed ductwork configuration including white PVC condensate lines and insulated supply ductwork, and documented current equipment specifications and installation conditions. Provided homeowner with complete system replacement options to address capacity concerns and improve overall comfort performance.
Conducted comprehensive assessment of existing HVAC system and water heater for replacement estimate. Evaluated 35-year-old furnace and air conditioning unit along with 42-year-old water heater, all of which have exceeded their expected service life and require replacement. Documented existing upflow furnace configuration in basement utility room, including measurements and clearances for proper equipment sizing. Provided detailed replacement quotes covering complete HVAC system upgrade, including furnace, air conditioner, and water heater options with both standard tank and tankless configurations to meet homeowner preferences.
Responded to water heater leak that had been active for one to two weeks. Removed and replaced failed unit with new A.O. Smith standard residential tank water heater, model 2741-JR1C-H4R4. Completed full installation including copper piping connections for inlet and outlet lines, water treatment device mounted at top of unit, and proper venting. Tested all connections for leaks, verified proper operation, and ensured unit met manufacturer specifications and code requirements.
Replaced existing sump pump system in basement utility area with new unit, including electrical hookup to ensure proper operation. Installed new check valves on discharge line to prevent backflow, removed and disposed of old sump pump equipment, and verified all connections were secure and functioning correctly per manufacturer specifications.
Completed annual tanked water heater maintenance as part of Bronze service plan. Performed full system flush to remove sediment buildup, inspected all connections and fittings at tank top including supply lines and relief valve, and verified proper operation of heating elements. Delivered replacement nano anode rod for corrosion protection and dropped off battery charger for customer equipment. All plumbing connections, PVC discharge lines, and brass fittings inspected and found secure with no leaks detected. Water heater operating within normal parameters upon completion.
Successfully completed installation of a 2.5-ton, 15.5 SEER Lennox HVAC system at the residential property. Unit was properly mounted on a concrete pad with all necessary line connections through the exterior wall, and system was tested for optimal performance before finalizing the installation.
Inspected drainage issue where waste water was improperly draining into sump pump basin. Evaluated existing plumbing configuration in basement, including PVC waste lines and connections. Removed switch component from tankless water heater system for replacement as requested.
Completed installation of a Lennox 2-ton 15.5 SEER 97% efficiency HVAC system for the upstairs zone. Work included mounting the outdoor condensing unit on a concrete pad adjacent to an existing unit, and installing the indoor air handler/furnace in the utility closet with proper PVC venting connections. All components were properly secured, connected, and tested for optimal performance.
Successfully installed a new NPE-240 tankless water heater on concrete block wall with proper venting, water connections, and gas line installation. Unit features Energy Star certification and digital display panel, with all PVC intake/exhaust pipes and copper water supply lines correctly fitted with appropriate elbows and joints.
Conducted a comprehensive replacement evaluation for a 15-year-old residential HVAC system (both AC and furnace units). System currently operational but approaching end of useful service life. Visual inspection of the basement mechanical area and outdoor condenser unit completed with photo documentation to support replacement recommendation.
Conducted comprehensive HVAC system replacement estimate for a property with non-functioning upstairs unit. Inspected existing equipment including indoor air handler in utility closet and exterior gas meter installation. Documented system configuration and installation space constraints for accurate replacement specifications.
Conducted comprehensive assessment of residential HVAC system for potential replacement, documenting existing equipment condition including deteriorated exterior condenser unit and aging furnace components. Evaluation included inspection of current ductwork configuration and utility connections to determine optimal replacement options, with recommendation for complete system upgrade under the Free Furnace with AC promotional offering.