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Pros and Cons of Hot Water on Demand

There has been a time in every homeowners life where you get home from a long day at work, and you’re looking forward to a nice hot shower… you turn the taps on, jump in and 30 seconds later you run out of hot water!! What if there was a way to avoid running out of hot water in your home ever again!! Well your in luck! Here is some information to help you decide what system will best fit your needs.


Tankless hot water systems have been around for years and starting to become more popular with the rise in energy costs. There are many great reasons for having a tankless water heater installed in your home. Here are just some of the pros and cons for this system.


  • Space saving in mechanical room
  • Limitless hot water
  • Life span is 20-25 years!!
  • Only heats water when taps are turned on
  • Savings up to 30% on gas bill
  • Good for residences occupied only part time


  • Initial installation price is more compared to hot water tank
  • Possibly having to run a bigger gas line
  • Not instant hot water (will require a recirculation pump if you want instant)
  • Maintenance is required depending on water hardness


  • 0.9% EF rating (90% will be converted into hot water)
  • Condensate lines will have to be run
  • Good for new construction homes
  • Most efficient model
  • Will need to be cautious on input water temp (city water temperature)


  • 0.8 EF rating ( 80% will be converted to hot water)
  • Less to breakdown
  • Requires stainless steel vent pipe
  • No condensate will be required
  • Perfect for a retrofit
  • Will not have hot water during power outage



  • Cheap initial cost of installation
  • Direct replacement from old hot water tank
  • Will not require a new gas line to be run


  • Water is heated in the tank to maintain a constant temperature even when hot water is not being used.
  • Can take up a lot of space in a mechanical room
  • Life span can be from 6 to 10 years
  • Can flood your basement

Some Average pricing

  • Hot water tank replacement: $900 to $1400
  • Tankless hot water system: $2500 to $3500

At Rep-Air Heating And Cooling we provide our customers with many options that will best suit your needs. From heating, cooling and refrigeration. Contact us today for your complimentary quote. and don’t forget to take a look at our website follow us on facebook and instagram for free giveaways!