02:18PM | 12/27/01
Member Since: 12/26/01
10 lifetime posts
This may sound strange, but we bought an old house, and don't really understand the heating system we have (no users manuals left behind). This came about when we tried to install a programmable thermostat, and found too many wires/different letters for the standard unit. We then took a closer look.
Aparrently this was all installed 10 years ago.
The furnace is a gas - simple enough. Beside it is a heat/air exchanger (I think that's what it's called - it brings in fresh air from the outside and exhausts air from the inside warming the air slightly from the outside). This unit can be switched on and off by itself and has it's own fan. In front of this is what is labelled a heat pump (there are pipes running to the air conditioning unit sitting outside, but no other pipes running into the ground). We're guessing that the condenser to the Air Conditioner is the unit outside.
My question is - what does all this do (Individually I have a good idea - but all together????)
The original thermostat also has an extra setting labelled EM Heat (what in the buns is that?)
Any information would be greatly appreciated.


03:53AM | 01/02/02
Member Since: 03/13/00
1678 lifetime posts
Yes, the outside unit is the heat pump. They take heat out of the inside air in summer and move it outside, and they run in reverse in winter, taking heat from the outside air and moving it inside. Even when it's cold outside, they can get some heat from the outside air to "move" inside.
The problem is that as it gets colder and colder, they become less and less efficient and have to work really hard to get heat from the cold air.
For that reason, there's a backup method that will kick in when the heat pump can't keep up with its heating requirements. Usually, but not always, this is an electric heat strip. Sounds like you've got a slightly more sophisticated setup.
Heat pumps are most efficient to use in certain climates. For more info about available types of thermostats, search on "heat pump thermostat".

[This message has been edited by rpxlpx (edited January 02, 2002).]



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

A simple banquette piled with pillows and lit from above with a wall sconce is a tempting spot to curl up with a favorite ... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... For windows, doors, and mirrors that could use a little definition, the Naples Etched Glass Border adds a decorative flora... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon