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Home Pentair MegaTherm High Performance Outdoor Commercial Swimming Pool Heater Pump Mounted | Copper Exchanger | 850K BTU Propane Gas | MT0850EP09CBPC
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Pentair MegaTherm High Performance Outdoor Commercial Swimming Pool Heater Pump Mounted | Copper Exchanger | 850K BTU Propane Gas | MT0850EP09CBPC

Pentair MegaTherm High Performance Outdoor Commercial Swimming Pool Heater Pump Mounted | Copper Exchanger | 850K BTU Propane Gas | MT0850EP09CBPC

Parts AvailableParts Available
Platinum Preferred Manufacturer
  • Reliable operation on natural or propane gas
  • Electronic ignition
  • Automatic gas valve
  • Easy-to-service header flanges
  • CSD-1 and other options available
Q & A
High Performance Electronic Ignition Commercial Swimming Pool Heaters
Powerful, efficient, and reliable, MegaTherm swimming pool heaters are designed for commercial, institutional and large residential pools where economical performance and rapid heat-up are required. Available in indoor and outdoor models in both natural and propane. MegaTherm is design certified to the ANSIZ21.56 Standard for Gas-Fired Pool Heaters. (Outdoor 500-1825 units are certified for use without the addition of a draft diverter or external vent. Indoor units incorporate a built-in draft diverter and require only vent piping.) Salt water models (500-1825) are available with cupronickel alloy heat exchanger tubes and bronze headers and header covers. 
Standard Features
  •  Reliable operation on natural or propane gas.
  •  Electronic ignition.
  •  Built-in draft diverter (indoor models) simplifies installation.
  •  Flow switch standard on all models.
  •  Integral pump assures proper water flow (Models 500- 1825).
  •  Automatic gas valve.
  •  Stainless steel burners, with slide-out burner tray for easy maintenance and long life (Models 500-1825).
  •  Galvanized steel jacket with acrylic finish for strength and durability.
  •  High temperature refractory firebox liner to 2000° F for greater efficiency.
  •  Easy-to-service header flanges.
  •  Corrosion-resistant glass-lined or bronze headers.
  •  Integral lined copper tube heat exchanger for higher efficiency.
  •  Electronic temperature control for accuracy. (Models 500- 1825;  model configuration varies slightly by size.)
  •  One-year limited warranty. See warranty for details. 
Brand Pentair
Sub Brand MegaTherm
Model Number 850 E
Item Outdoor Swimming Pool Heater
Type High Performance
Gas Type Natural Gas
Headers Glass-Lined/Bronze
Tubing Material Copper
BTU Input 850,000
Cabinet Width 74.50"
Cabinet Depth 29.75"
Cabinet Height 58"
Ignition Spark 24V
Flue Diameter 14"
Firing Mode On/Off
Gas Connection 1" NPT
Water Connection 2.5" NPT
Voltage Rating 24/120 VAC
Housing Finish Acrylic
BTUH Output 689,000

Brand: Pentair
BTU Rating
Gas Type
Q & A
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Adobe Acrobat PDF Brochure
Adobe Acrobat PDF Installation Instructions

Register your Pentair product online at www.pentair.com.

You've always been able to count on the quality and long service life of Pentair products. Pentair uses state of the art workmanship, materials and manufacturing processes to create the most innovative pool and spa equipment anywhere. And now Pentair products can deliver even more value and peace of mind, because Pentair offers extended warranty coverage on select products that are installed by a qualified installer*.
While the majority of Pentair products are covered by a sixty- (60) day warranty, a select number of products qualify for extended warranty coverage.
Select Bundled Products: applies to purchases and qualified installation of a minimum of a pump and filter, and one or more of the following: heaters, heat pumps, control systems, automatic cleaners, lighting, salt chlorine generators or UV sterilizer**
*Note: Qualified Installer - Defined as a licensed professional who charges a fee for his services, and possesses a business license, contractor's license and/or resale permit. Common examples of a "qualified installer" include: Swimming Pool, Home Repair or Landscape Professional; Plumber or Electrician; General Contractor; Heating and Air Conditioning Specialist.
**Note: Bundled products - must be purchased on the same invoice and installed at the same time. If any product within a bundle is ineligible for the bundled warranty coverage then all products within the same bundle will be disqualified from receiving the three (3) year extended warranty coverage for bundled products.
TradeGrade products must be purchased from a retail store (brick & mortar), pool builder or pool service company to receive a one-year, two-year or three-year warranty. If purchased online will only receive a sixty-day limited warranty. View the list of TradeGrade Products.
Ecommerce (EC) products: Products purchased from an Authorized Pentair Online Reseller (products beginning with EC-) receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty.
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 11/19/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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