Pool Info: Facts about Pool Heating - Page 2
Laars/ Jandy FAQ (cont.)
By heating your pool, you make it possible to engage more often in swimming exercise because you extend the hours and the season your pool may be used.
A heated pool prevents chilling and the problems caused by the loss of too much body heat. Pediatricians say very young children are especially susceptible to various respiratory infections which may result from repeated chilling, and this is also true of elderly swimmers.
A heated pool is a must for therapeutic benefits and when swimming for relaxation. Doctors and Red Cross swimming experts recommend pool temperatures of from 78° F for recreation and competitive sports swimming, to 90° F or more for certain physical therapy patients.
What are the costs involved in heating a pool?
First, there is the initial or one-time cost of the heater you select and its hook-up or installation charge. Second, there is the monthly fuel cost, which varies with the type of heating system you buy, the use of your pool, the pool water temperature you prefer and other variables. Third, there is the matter of annual or semi-annual maintenance and service.
Operating costs can be kept to a minimum by installing an efficient, properly sized heater; using a good quality pool cover; and, of course, keeping your filter clean and your heating and filtering system well maintained.
We hear a lot of praise for the pool cover. Is it merited?
Most certainly. A good insulating pool cover can reduce heat loss by 50% or more, depending on your location and climate.
A pool that is uncovered can lose up to 5° F overnight; a good cover can cut that loss by half.
Used at night or whenever your pool is not in use, the pool cover can help save fuel costs by cutting heat loss regardless of the type of heating you utilize. And it can even make an unheated pool more "swimmable" by helping to retain the sun’s energy that naturally heats the pool during the daytime.
A pool cover stops water evaporation when it is in place. It isn’t the water loss that’s the big consideration here, it’s the heat loss. Every gallon of water that evaporates from a pool takes with it 6000 BTU’s of heat in the process, and a typical uncovered pool loses 1 to 1½ inches of water a week through evaporation. For a 20 by 40 foot pool, an inch of water amounts to 500 gallons—roughly, a heat loss of more than 30 therms every seven days. (A therm is equal to 100,000 BTU’s).
Besides stopping heat loss, a cover saves on pool chemicals, too, by keeping them from evaporating with the water.
What do I do about heating a spa that’s part of my pool?
One Teledyne Laars/ Jandy heater can serve both your pool and spa. Our Model ESC heater is equipped with a switch that allows you to select either a spa or pool setting, so that with proper plumbing and valving you can heat the spa portion of your pool installation to the temperature you want.
What are the advantages of a separate spa?
Originally these spas were purchased primarily by people with specific physical disabilities requiring hydrotherapy. Today, however, the spa is recognized as a place where anyone can relax and enjoy relief from the stresses of daily activities as well as from aches and pains requiring hydrotherapy. The spa, built as part of the main pool, is walled off with its own water circulation system. Both can use the same filter and heater system with simple controls to switch from one to the other. A spa typically operates at about 100° F and provides a therapeutic whirlpool effect by means of high velocity water jets or bubbles.
It is important to know that use of a spa at high temperatures can be hazardous, particularly in conjunction with alcohol or drugs, or when a person is very young, very old, pregnant, or in poor health. The U.S. Consumer Product Safety Commission can provide guidelines for spa use. Consult your physician as to a safe temperature for you and your family.
What types of heating are available to us?
Several—from the sun itself to gas-fired, oil-fired, electric and elaborate solar heating systems.
The most widely used type is the direct fired natural gas heater because of its low cost, reliability, ease of operation and the wide availability of natural gas. In areas where natural gas is not available, heater models can be furnished equipped to use LP gas or propane gas.
Oil-fired pool heaters are a good choice in areas where natural gas is unavailable but home heating oil is. Electric heaters are generally much less efficient and more costly to operate than natural gas heaters, unless the electricity is hydroelectrically generated.
Used alone, the passive heating technique merely serves to help keep pool temperatures at existing levels by retaining natural solar heat and preventing its loss. It cannot add heat to build up water temperature beyond what the sun supplies. Active solar uses traditional pool motors to move water from the pool through a system of solar collector panels for heating by the sun. This increases the amount of solar heat added to the pool.
Why not go strictly solar? After all, it’s free.
Not exactly—in fact, not by long shot. An adequate solar pool heating system will cost... (continued......)The information on this page is provided by Teledyne Laars/ Jandy, a leader in the Pool Heating Industry, from their brochure "Facts about pool heating"