Laars Pool Heater Selection and Sizing Guide

- [POOL SIZING]

- [SPA SIZING]

- [NATURAL GAS PIPE SIZING]

POOL SIZING

Determine your pool’s surface area in square feet.

Rectangular Pool: Area = L x W

Round Pool: Area = R x R x 3.14

Kidney-shaped Pool: Area = (A + B) x L x .45

In the table below, locate the surface area equal to or slightly greater than the pool’s surface area, read to the left and select the appropriate heater.

SPA SIZING: Determine your spa capacity in U.S. gallons (surface area x average depth x 71/2). The reference tables list the time required in minutes to raise the temperature of the spa/hot tub by 30°F. In the table below, locate the spa/ hot tub size in U.S. gallons. Select the desired time to raise the spa/hot tub temperature 30°F, read to the left and select the appropriate heater.

This guide can be adjusted for other temperature rises. For example, if you desire a 15°F increase in temperature, simply divide the time for 30°F rise by the 15°F increase (30/15 =2).
Note: Heat losses and/ or heat absorbed by spa walls or other objects will add to heat-up time.

Spa sizing is based on an insulated and covered spa. Always cover your spa or hot tub when not in use to minimize heat loss and evaporation.

Natural Gas Pipe Size Requirements: Distance from gas meter determines the required gas pipe size for specific heater model/size

Hayward

Hayward

Hayward

Hayward

AquaRite