Frequently Asked Questions

  • How do I know what size AC unit I need for my home?

    Proper AC sizing depends on your home's square footage, insulation quality, window count, and ceiling height. An oversized unit cycles too frequently, while an undersized unit struggles to cool effectively. At Hyson Mechanical LLC, we perform precise load calculations to match the right system to your home's specific cooling needs.

  • What's the difference between a furnace and a heat pump for New Hampshire winters?

    Furnaces generate heat by burning fuel and work reliably in extreme cold, while heat pumps transfer heat from outside air and are highly efficient in moderate temperatures. Modern cold-climate heat pumps now perform well in New Hampshire winters. At Hyson Mechanical LLC, we help homeowners choose the right heating system based on their home's design and energy goals.

  • How often should I schedule HVAC maintenance?

    HVAC systems should be serviced at least once per year—air conditioners in spring and heating systems in fall. Regular maintenance includes filter changes, performance testing, and inspections that extend equipment life and prevent costly breakdowns. At Hyson Mechanical LLC, we offer comprehensive preventive maintenance programs to keep systems running efficiently year-round.

  • Can a mini-split system heat and cool my home?

    Yes, ductless mini-split systems provide both heating and cooling through a single unit. They offer zoned temperature control, improved energy efficiency, and better air quality without requiring ductwork. Mini-splits are ideal for older homes, additions, or spaces where traditional HVAC installation isn't practical.

  • What are the most common reasons an AC stops working?

    The most frequent AC failures include refrigerant leaks, compressor issues, electrical failures, and faulty thermostats. Broken blower motors and burnt coils also cause sudden system breakdowns. At Hyson Mechanical LLC, we provide 24/7 emergency diagnostics and repairs to quickly restore cooling when systems fail unexpectedly.

  • Is a boiler or furnace better for heating in Sandown NH?

    Boilers heat water and distribute warmth through radiators or radiant floors, offering even, comfortable heat. Furnaces use forced air and heat spaces faster. Both work well in New Hampshire winters when properly sized. At Hyson Mechanical LLC, we assess your home's layout and heating preferences to recommend the best system.

  • What brands of air conditioners do professionals recommend?

    Top-performing AC brands include Concord, Carrier, and Fujitsu, known for reliability, energy efficiency, and consistent cooling performance. Professional installation is essential to ensure optimal operation and warranty coverage. At Hyson Mechanical LLC, we install and service these trusted brands with precise sizing and quality workmanship.

  • How long does a gas line installation take?

    Most residential gas piping projects, such as outdoor grill lines or stove conversions, take one to two days depending on complexity and distance. Complete gas system design and installation may require additional time for permitting and inspections. Professional installation ensures safe, code-compliant gas delivery to all appliances.

  • What happens during an HVAC tune-up?

    An HVAC tune-up includes system inspections, filter changes, coil cleaning, thermostat calibration, and performance testing to identify potential issues. Technicians also check refrigerant levels, electrical connections, and airflow. Regular tune-ups reduce energy costs, improve comfort, and extend equipment lifespan by catching problems early.

  • When should I replace my heating system instead of repairing it?

    Consider replacement if your system is over 15 years old, requires frequent repairs, or no longer heats efficiently. Rising energy bills and uneven temperatures also signal it's time for a new unit. At Hyson Mechanical LLC, we evaluate repair costs versus long-term savings to help homeowners make informed decisions.

  • Do mini-splits work well in cold New Hampshire winters?

    Modern cold-climate mini-splits are designed to heat efficiently even in sub-zero temperatures, making them reliable for New Hampshire winters. They provide zoned heating, reduce energy waste, and maintain comfort without ductwork. At Hyson Mechanical LLC, we install mini-split systems engineered for year-round performance in harsh weather.

  • What should I do if my furnace stops working at night?

    Check your thermostat settings, replace the air filter, and ensure the circuit breaker hasn't tripped. If the furnace still won't start, call for emergency service immediately to prevent frozen pipes or unsafe conditions. At Hyson Mechanical LLC, we offer 24/7 emergency heating repair throughout Sandown and surrounding areas.