North San Diego County HVAC & Plumbing Services
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Frequently Asked Questions

The Help You Need from Our San Diego HVAC Team

At Sherlock Plumbing, Heating & Air, we know that you may have numerous questions regarding your home comfort system. Our team has everything you need to complete routine maintenance, complex repairs, or even total replacements for your heating or cooling system. We take great pride in providing top-quality services and unparalleled workmanship, and we are here to help you get everything you need for an optimal home comfort system.

If you find yourself in need of a highly skilled San Diego heating and AC specialist, call our team at (760) 206-4167 today! We are able to help answer all of your questions.

  • Who will work at my home?

    With our team of background checked and drug tested professionals, you can be confident that your home will remain clean, undamaged and safe. We’ll send you an email or text before your appointment so you know exactly who to expect.

  • Are you a licensed contractor?

    We are a licensed HVAC (C20) and plumbing (C36) contractor serving San Diego County since 2002 – CA license #804383. We are bonded and carry $1,000,000 in liability insurance. We encourage our clients to verify the credentials of any contractor they welcome into their home or business.

  • How do I know if my installation will be done properly?

    We hire and train our technicians with the goal of exceeding industry standards. Additionally, we rely on independent, 3rd party HERS testing companies and city inspectors to verify all our installations for safety and efficiency.

  • What factors are responsible for the range in prices between contractors?

    Not all installations are created equal! We consider each installation to be a custom project based on the needs of each client. Prices vary based on equipment brand, efficiency, and application, existing HVAC system and ducting, electrical and many other factors.

  • What does AFUE refer to?

    This stands for the Annual Fuel Utilization Efficiency, and is a measurement of the efficiency of gas furnaces. The higher the rating, the more efficient the unit is!

  • What does HSPF mean?

    This refers to the Heating Seasonal Performance Factor, which rates the efficiency of heat pump equipment. A higher HSPF rating means a more efficient heat pump unit.

  • What is a SEER rating?

    Air conditioning equipment is rated for efficiency through the Seasonal Energy Efficiency Rating (SEER). High ratings mean an efficient air conditioning system.

  • What do the ratings numbers mean?

    The federal government maintains standardized efficiency ratings of all HVAC equipment to reflect how efficiently the energy is used.

  • What differentiates a package unit and a split system?

    A package unit does not require any external coils, heating units, or air handlers, whereas a split system will utilize components both indoor and outdoor.

  • How do I determine what size unit is best for my home?

    Our team will factor in considerations like climate, house size, how many windows are in the home and their type, how many people are living in the house, and even what kind of insulation your home has to recommend your ideal unit.

  • Does the indoor unit need to be replaced if the outdoor unit is being replaced?

    Yes! Your heating and AC system is designed to operate as a single system – its efficiency depends on it. By keeping the system as a whole up to date, you are ensuring that it is running at maximum efficiency.

  • Can I plant flowers or shrubbery around an outdoor unit?

    You can, but we strongly recommend that you give the unit at least 18 inches of open space between the unit and the plants to allow for circulation. Without this space, you could cause the unit to overheat and need premature maintenance.

  • What should I set my thermostat to, “Auto” or “On”?

    Auto is the preferable setting, as it is the most efficient option because it only operates the fan when the temperature merits it. That said, leaving it set to “on” does mean that the air in your home is being circulated constantly and maintains a consistent and even temperature throughout the house.

  • Should I cover my outdoor unit in the winter?

    No. Heat pumps are in use all year round, and any outdoor unit is built to withstand what the environment has to offer.

  • Why do I need a humidifier?

    This is a way to make dry, heated air more comfortable by injecting water vapor into the home. It is far from a requirement, but it can certainly help make your home more comfortable and efficient.

  • What is duct work?

    If you have a central heating and cooling system, it uses ducting systems to transfer the cool or warm air throughout your home.

  • What are indoor coils?

    This is the device that transfers heat from the indoors to the outdoors – or vice versa.

  • What is a furnace?

    A furnace is an important aspect of a forced-air system. The warmer air is forced through the air ducts in your home, then through the furnace where it is filtered and warmed further.

  • What are evaporator coils?

    These are a critical part of the indoor part of a heat pump. When warm air passes over the coils which contain refrigerant, the refrigerant absorbs heat, then travels outside to release that heat, and circulates that way to regulate indoor temperature.

  • What does downflow mean?

    This describes how the air is moving through a furnace – a “downflow” furnace has its intake at the top, then expels heated air below.

  • What does BTU stand for?

    This is short for “British Thermal Unit” and is a unit of heat required to change the temperature of a pound of water by a degree in Farenheit.

Count on Sherlock to Solve Your Comfort Needs

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