Learn about Downflow / Horizontal
Copyright 2008 Alpine Home Air Products www.AlpineHomeAir.com 5
Boilers heat water and circulate the hot water or steam through
pipes to radiators in each room. There is no ductwork con-
nected to boilers, and they aren’t central air conditioning
compatible – they are used for heating only. Some people say
that they like the way the heat feels from a boiler system since
it is radiant; gentle rays of heat come from the room radia-
tors instead of warm air being blown into the room like with a
forced air heater.
Another increasingly
popular way to use
a boiler is for in-oor
heating. Tubing is
placed under the oor
that the hot water
circulates through, which makes the entire oor warm. This is
especially nice if you have tile ooring which is typically cold
to walk on in the winter. Whichever way a boiler is used, with
room radiators or with in-oor tubing, pipes or tubing are re-
quired throughout the home to circulate the boiler’s hot water
or steam. If you have a boiler and piping already, the best home
heater choice for you is to replace it with another boiler.
3) Split-System Heat Pump
A heat pump is a central air conditioner that provides cooling
in the summer, and then runs backwards in the winter to also
provide heating. It operates entirely on electricity and is usually
a low-cost way to heat a home. A split-system heat pump has
two parts, the heat pump which sits outside in the yard, and an
air handler which sits inside the home and connects to duct-
work to distribute the warm or cool air throughout the home.
Heat pumps work best in warmer parts of the country, but can
be used in the North as well when accompanied by a second-
ary source of heat (either an electric heater coil installed in the
air handler or a gas furnace.)
A split-system heat pump is a great choice if you:
You live in the Southern USA•
You want air conditioning too•
Electricity is relatively aordable in your community •
(compared to gas or propane)
You have or will be installing ductwork in the home•
You are replacing a split-system heat pump•
4) Package Units
A packaged unit type of equipment means the entire equip-
ment sits outside the home. The only thing in the home is the
ductwork which exits the home and connects to the packaged
unit. Package units usually come with air conditioning as well
as heating combined in the same equipment. The two types of
packaged units are:
Packaged Heat Pump• s – These run entirely on 220v electric-
ity, and provide both heating and cooling
Gas Pack• s – These run on natural gas or propane for heat, and
220v for air conditioning
Packaged units are a good choice if:
You have no space inside the home for heating equipment•
You live in a mobile or modular home (they blow the air •
properly through these home’s special ducting)
You are replacing an existing packaged unit•
5) Hanging Furnaces
A hanging furnace operates on natural gas or propane, and is
suspended from the ceiling. Hanging furnaces (often called a
“garage furnace”) are used in warehouses, garages, workshops,
and other similar spaces. No ductwork is required, as the unit
blows the warm air directly into the space.
Hanging furnaces are not capable of being connected to a
central air conditioning system, and most manufacturers don’t