We Now Accept Recipient ADVANCING THE STATE OF THE ART. The Hayward H-Series heater incorporates the most advanced heating technology to provide luxuriating comfort, energy efficient operation and long lasting dependability. When you select the patent-pending H-Series you'll turn up the heat in confidence with features that include a rust-resistant water path, a rapid heat combustion chamber, and a direct spark ignition system. You'll be equally impressed with the appearance and user friendliness of the H-Series heater as you are with it's performance. Low-profile in design, the H-Series offers such aesthetic attributes as an integral draft hood, contoured cabinet styling and a control panel that features a LED diagnostic system. GRADUATE TO A HIGHER DEGREE OF COMFORT 1) ULTIMATE durability Unlike other models that use a heavy cast iron or costly bronze assembly, H-Series headers are manufactured from a modern injection-molded polymer process. They are Covered by a 10 Year Warranty. 2) THE perfect Temperature The H-Series features a high performance flow control system that continually monitors and regulates water flow, maintaining internal temperature at a constant level. It's designed to deliver maximum efficiency. 3) GEOMETRY that adds up to TOTAL COMFORT The jet-ported burner system evenly distributes incoming fuel to precise geometric openings on each burner tube. This assures that each flame is in the most fuel efficient position on the tube assembly. The result is superior comfort at all times. Constructed of tough, durable Eugenox, a proprietary steel alloy, H-Series burners can be removed individually or as a complete unit for easy maintenance and cleaning. 4) GET the MOST out of each BTU The patent-pending one inch thick FireTile insulated combustion chamber creates an interlocking shell that is measurably stronger, with improved heat retention capabilities. Unlike older fire brick, FireTile holds the heat in and doesn't allow it to escape, providing 83% thermal efficiency. 5) CONNECT with CPVC The H-Series' ability to cool down quickly after heating your pool or spa to the desired temperature allows for the use of CPVC plumbing connections. This exclusive Hayward capability not only eliminates the need for expensive heat sinks and fireman switches, but also reduces time and cost at installation. As an added benefit, a CPVC connector kit is included with every H-Series heater! MODEL Spa / Tub Size in Gallons   200  300  400  500  600  700  800  900 1,000   Time in Minutes to Raise Spa / Tub Temperature by 30 Degrees F. H-400  9 14  19  23  28 33  37   42 47  H-350   11 16  21  27  32  37  43  48  54 H-300   12 19  25  31  37  44  50  56  62 H-250  15  22  30  37  45  52  60  67  75 H-200  19 28  37  47  56  66  75  84  94 H-150  25 37   50  62  75  87  100  112  125 MODEL # Pool Surface Area MSRP ( List) PRICE H-150 Millivolt 450  $2249.10  $1798.16 H-150 Electronic / Dual  450 $2432.85   $1945.06 H-200 Millivolt 600 $2457.00    $1964.37 H-200 Electronic / Dual 600 $2626.05   $2099.53 H-250 Millivolt 750 $2546.25   $2035.73 H-250 Electronic / Dual 750 $2715.30   $2170.88 H-300 Millivolt 900 $2877.00  $2300.16 H-300 Electronic / Dual  900 $3046.05 $2435.32 H-350 Millivolt 1,050 $3098.55 $2477.11 H-350 Electronic / Dual 1,050 $3267.60  $2612.45 H-400 Millivolt 1,200   $3343.20 $2619.08 H-400 Electronic / Dual 1,200   $3512.25  $2808.05  Indoor Draft Hood      $151.11  High Wind Stack      $151.11