What is the Best Whole House Swamp Cooler?

By | March 22, 2021

What is the Best Whole House Swamp Cooler
If you are looking to install a swamp cooler or buy a new unit there are many available to choose from.

First of all, if you currently have one installed be sure it is completely worn out as often old swamp coolers can be repaired.

Once a new swamp cooler is needed there are a few things to consider including type, voltage, and capacity

How Do Swamp Coolers Work?
A swamp cooler also called an evaporative cooler work by the cooling effect of evaporation.

If you have ever gotten out of a swimming pool on a windy day and become cold it works much the same way.

Water is pumped up to the top of the cooler to pads which become soaked in water.

A motor turns a larger blower which blows air into a home pulling air past the wet pads.

As the air passes the wet pads it becomes cold which can cool down a home.
Types of Swamp Coolers

  • Side-Draft
  • Down-Draft

The main two types of whole house swamp coolers are side-draft and down-draft units.

Side-draft units blow air into a home from the side.
What is the Best Whole House Swamp Cooler Side Draft
Side draft units are usually set up to blow cool air in through a window but a hole can also be cut out.

Down-draft units blow air from the bottom down into a home.
What is the Best Whole House Swamp Cooler Down Draft
Down-draft are mounted on the roof and blow cool air into a home.

A side draft can often be easier to install if there is a window available to use.

A mount will be needed to set the cooler on.

Down-draft units have the benefit of being out of the way not taking up space or blocking a window.

They can be harder to mount depending on the type of roof.

Roof mounted units must also be sealed up well as to not leak when it rains.

Both side draft and down draft evaporative coolers work well with the best option depending on the home.

If you are replacing an old unit building the same type will save time and money.

If it is a new install the best location for the unit will vary from home-to-home and will change with the scenario.

Swamp Coolers Voltages

  • 110/120 Volts AC
  • 220/230 Volts AC

The wiring to the unit also needs to be considered with both 110 and 220 volt AC units.

The main blower motor will dictate the voltage type.

If you are replacing an old unit simply be sure to buy the same voltage type.

If this is a new install the type of voltage used will need to be thought out.

A dedicated breaker should be set up for the swamp cooler along with the correct wire gauge.

Sizing a Swamp Cooler
How big a swamp cooler you need is measured by the CFM (Cubic Feet a Minute) of air a unit can output.

For example, a unit that can output 2,000 CFM can cool a space roughly 250-500 square feet.

Of course, other factors need to be considered such as how well insulated a building is and how hot the summers get.

Swamp Cooler Sizing Chart

CFM of Swamp CoolerCooling Capacity
200-750 CFM50-250 Sq Ft
750-2,000 CFM250-500 Sq Ft
2,000-4000 CFM500-1,000 Sq Ft
4,000-7,500 CFM1,000-2,000 Sq Ft
7,500 or Higher CFM2,000-4000 Sq Ft

Swamp Cooler Pad Types

  • Aspen
  • Synthetic Fiber

There is two main types of cooling pads available Aspen and Synthetic Fiber.

Aspen pads use wood shavings which is natural giving a nice clean fresh smell to them.

Synthetic fiber pads usually last longer.

The water supply will have a big impact how long the pads last before needed to be replaced.

For example, a local water supply high in calcium will slowly build up and block the padding.

Pads are often replaced every year although with a good water source can last much longer.

Buying a new swamp cooler can be a real benefit to a home, garage, or any building needing to be cooled.

They cost less to buy and install compared to traditional air conditioning.

The one downside is they don’t work well in humid environments.

For this reason, they are mainly used in desert regions such as the American Southwest.

When buying a new unit for your home be sure to check if you need a side-draft or down-draft unit.

The electrical will also need to be considered with either 110 or 220 volt AC.

Many motors run more efficiently with 220 volts AC but 110 volt AC units work well also.

As always be sure to read the reviews on Amazon, forums, or elsewhere to be sure a unit is a good fit for you.



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