If you have any questions at all. 85,000 btu 316l stainless steel pool & spa heat exchanger wood outdoor boiler. This type of heat exchanger is used to heat a swimming pool or spa from any hydronic system such as an outdoor furnace. It can also be used in conjunction with an existing gas, propane or oil fired boiler. Specifically, it is used to keep the pool and boiler water separate while providing an efficient means to transfer heat between the two systems. This model can be used for up to a 7,300 gallon pool at a 1°f/hour heat up rate. These heat exchangers can also be used in traditional indoor boilers, geothermal, solar, biodiesel, and other industrial/manufacturing applications. Constructed with corrugated tubes for optimal efficiency. Less expensive, more durable, and easier to install than brazed plate heat exchangers. Designed to perform at high fluid velocities with low pressure drops. Complete welded construction ensuring strength and durability. Due to high flow rates through the exchanger, it is inherently self cleaning. Stainless steel heat exchangers are. Intended for use with salt water pools. For salt water pools, please see our cupro-nickel or titanium pool heat exchangers. These exchangers are ul listed, whereas other ones that look similar have not undergone the ul approvals process. Constructed using all 316l stainless steel. Boiler (tube) side: 1 fnpt fittings. Pool (shell) side: 1-1/2 fnpt fittings. Shell side ports on same side for easiest installation. Units with opposing side ports are also available. For occasional (weekend & holidays) use we recommend a 2x multiplier to obtain a 2°f/hr heat up rate. Place chlorine in skimmer basket, and if using an auto-chlorinator, be sure to install a check valve between the heat exchanger and the auto-chlorinator. Please note that the. Lower 48 us: free. $9.95 s&h on orders $98.99 and below. (excludes insulated piping systems, please see below). If an item arrives damaged or defective, return it within 7 days of arrival and we will replace it at our expense.The item “85,000 BTU 316L Stainless Steel Pool & Spa Heat Exchanger Wood Outdoor Boiler” is in sale since Tuesday, March 02, 2010. This item is in the category “Home & Garden\Home Improvement\Heating, Cooling & Air\Other”. The seller is “alternativeheat” and is located in Middleport, New York. This item can be shipped worldwide.