Canada-Wide Shipping Look for Free Shipping label on select items!
Pick-up Location 3280 Steeles Ave W, Unit #22
Concord, ON • Click for Map & Hours
COVID-19 Notice Our website remains open for business. We offer a curbside pickup and Canada-wide shipping. Our physical locations will remain closed to the public.
Free Local Delivery Available
Shop for Parts
Get Installation Quote

Sta-Rite SR333HD Max-E-Therm Natural Gas Pool Heater 300k BTU

List price: $4,124.13
You save: $624.14 (15%) Get an extra 3-10% off through our Rewards Program
-3% -7% -10%
Price in points: 70000 points
Reward points: 350 points
Contact us for availability
I acknowledge that this product is non refundable and installation of this product must be performed by a certified gas technician; self-installation can void manufacturer's warranty.

Quick Overview

Sta-Rite Max-E-Therm 333 is designed for faster heat-ups and the top-mounted control panel has large a digital display with indicator lights that pinpoint heater or system conditions in case there's a need for troubleshooting. Max-E-Therm features an LED temperature readout with dual thermostat controls, 6-position control panel and PVC union connections. It's very economical in operation due to high energy efficiency. All Sta-Rite Max-E-Therm heaters are certified for low NOx emissions and outperforms industry standards for air pollution exhaust. Max-E-Therm HD heaters are equipped with a curpo-nickel heat exchanger which makes them suitable to operate in saltwater pools.

Sta-Rite Max-E-Therm SR333HD Cupro-Nickel Natural Gas Pool Heater

When you don't have a heater for your pool, the first beautiful days of the summer can be disappointing. Though the weather might be warming up, it can take a while before your pool catches up - cutting your swimming season down significantly. With a reliable heater, you can extend your season by weeks each year, getting more use out of your pool, and encouraging more active fun for your family.

With the Sta-Rite Max-E-Therm heater, you can enjoy a longer summer filled with comfortable time in the pool. Made with a Cupro-Nickel heat exchanger, this Sta-Rite saltwater heater is built to work with chlorine or saltwater pools.

Why choose the Sta-Rite Saltwater Heater?

The Sta-Rite Max-E-Therm Heater is optimized to heat your pool affordably. With an 84% efficiency performance, your Sta-Rite saltwater heater provides you with powerful heating, without massive utility bills. The low emissions ratings exceed standards, making this heater an environmentally-friendly choice.

The Sta-Rite saltwater heater is also incredibly easy to use, with a convenient top-mounted digital display. With a glance, you can see the temperature of your pool, and adjust it as needed. This heater also comes complete with a self-diagnostic system, alerting operators to problems and guiding users through troubleshooting steps. This intuitive system helps pool owners to avoid common heater damage issues, ensuring years of reliable performance.

Comfortable Swimming every day of the Summer

When you choose the Sta-Rite Max-E-Therm Heater, you can provide easy and affordable heating for your pool throughout the whole summer. The swimming season in Canada is short, and adding an efficient heater is one of the best ways to extend the summer, and get more use from your pool. With the Max-E-Therm heater, you can rely on efficient and compact heating for many summers to come - whether you have a chlorine or saltwater pool.

Sta-Rite SR333 HD Features

  • Heavy Duty Cupro-Nickel Heat Exchanger suitable for use in saltwater pools.
  • Lightweight, yet durable construction lets the unit withstand the harshest of utilizations, such as to low pH, high flow and heavy use.
  • Rust-resistant casing - sleek, matte dark housing is made of Dura-Glas - a high-end material that can resist the heat and cold of the elements.
  • Best in class energy efficiency. Standard Copper Heat Exchanger 84% efficient. Heavy-Duty (HD) Cupro-Nickel Heat Exchanger 82% efficient.
  • Lower Operating Costs - 84% efficiency rating of Sta-Rite SR333 means lower energy consumption and in turn lower costs for you.
  • Environmentally Friendly - All SR333 units are low NOx .
  • Compact design - Ideal for retro-fit installations.
  • Simple to Switch - Change gas sources with installation of separate orifice.

For residential use only.

Manufacturer Warranty: 2 Years

Pool Size:
18 x 36'
Dual Voltage
2 Year
Electronic Ignition:
Heater BTU:
300K+ BTU
Heater Fuel:
Natural Gas
Heater Pool Type:
Suitable for Saltwater:
I ordered Sta-Rite Max-E-Therm 333 Model from Toronto Pool Supplies and was instead shipped the 200 model in a 333 box and outer metal casing from the 333 model. It was obviously the manufacturer's defect not Toronto Pool Supplies' fault and I probably would not have even realized it if the technician who came to install the heater did not inform me of this. I contacted Toronto Pool Supplies and they dealt with the manufacturer for me. They shipped me a new heater and Sta-Rite (?) picked up the old one. The whole process took over two weeks but at least there was no problems with it and Toronto Pool Supplies support was very helpful. The new heater (333 Model) works well and I'm happy with it.
Write a review
  • Installation
  • Request a Quote on Installation

    Toronto Pool Services

    Pool Equipment installation services are provided by our partner, Toronto Pool Services.

    All installations are performed by certified technicians and are backed by a one-year labour warranty. By submitting this form you will share your information with our partner and they will provide you with a quote by email. You are under no obligation to purchase the product or the installation service. Product prices on do not include installation costs.

    For more information, visit

    NOTE: Product images are for illustration purposes only and may not exactly match the actual product due to seasonal model, color or design changes. When shopping for parts we strongly recommend to check the SKU or "Part Number" which is listed on each product page. If you are unsure whether this is the correct product or need assistance please contact us.

    Related Products

    Just a quick reminder - Toronto Pool Supplies is an online-only store. Our Concord, ON location is a pickup point, not a retail store and we cannot service walk-in customers. If you want to pick up your items in person please place an order online first and we will email you when it's available for pickup.

    New Hours for 2021 Season: Mon-Wed: 9AM - 5PM / Thu: 9AM-8PM (Extended) / Fri: 9AM-5PM