Re: Buying a New Pool Heater
The consensus here is that the current Hayward heater is to be preferred:
Hayward Universal pool heater (www.hayward-pool.com)
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The prices at Amazon are not the absolute best I've seen but are quite good, and very close to what I've paid wholesale . . . especially when you consider the free shipping and Amazon's excellent return policy. (There may be differences on the return policy for 'installed' items -- I have not investigated this.)
Remember that if you purchase through Amazon, from a 3rd party seller, there is still a warranty but it's definitely more of a problem to follow through, than with Amazon directly. As of June 2013, these links should go only to heaters sold directly by Amazon.
Natural gas models:
Propane models: