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    Josh Mitchell

    Josh Mitchell

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    HVAC Technician

    Josh is an experienced HVAC technician and owner of Air Conditioner Lab, an online resource on heating, cooling, and energy efficiency. Josh focuses on enhancing indoor air quality, reducing energy use, and addressing heating and cooling challenges. Through reviews, guides, and tips, Josh and his team provide information on HVAC systems, air purifiers, and other home comfort products.

    Latest articles by Josh Mitchell

    A cozy living room with large rug, upholstered chairs and matching sofas, a glass coffee table, and a large white panelled fireplace. To the left is a blue sideboard. There are bright windows either side with floral curtains.

    7 Things I Tell Every Homeowner About Furnace Maintenance as an HVAC Pro to Avoid a Breakdown on the Coldest Night of the Year

    These are the essential furnace maintenance checks to make right now

    • Luxe cream living room with hardwood floors and rug with paneled walls and bookshelves. There is a cream teddy four-seater sofa, and two single striped green chairs around a brass and glass coffee table. Floor-to-ceiling cabinets are built in, along with full height curtains, giving it a luxe look

      As an HVAC Pro, These Are the 5 Biggest Heat-Loss Mistakes I See in American Homes – Here’s How to Fix Them Fast

      These simple steps will reduce energy bills and boost heat retention by up to 30%

      By Josh Mitchell Published 25 November 25

    • A maximalist seating area with patterned red chairs surrounding a stone coffee table. Yellow drapes cover floor-to-ceiling windows and patio doors behind.

      Your AC could be costing you double if you skipped this simple maintenance task – trust me, I'm a HVAC technician

      Doing it will boost efficiency by 15%

      By Josh Mitchell Published 3 July 25

    • 'Stop annoying chills' and save money – draft proofing your living room will slash energy bills by a third

      Create a cozy, energy-efficient living space our expert advice

      By Josh Mitchell Published 23 December 24

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