I need to install my Dimplex baseboard heater

if you want to risk burning your house down . call an electrician and see what they can do to reduce the line voltage you have .

Try this link: http://www.dimplex.de/en/downloads/installation-instructions.html

Dimplex probably can answer your question.

Call Dimplex directly, they can email you the instructions.

Technical specialists:
1-888-346-7539
Monday - Friday
8:00 a.m. - 4:30 p.m. EST

Tereca, the quickest way to answer your question is for you to Call Dimplex USA, Technical Service at 888-346-7539. And if you have misplaced your Owners Manual, ask them to please send you one. Have the Model Number of your heater handy, when you call.

http://partner.dimplex.com/files/domain4103/7207610100rev00.pdf

Depends on the heater/fixture. All devices of this sort list minimum clearances between sides and combustable materials.

As to will insulation be a problem, depends what you call a problem. Will it need to be removed? Most likely yes if for no other reason then to provide cavity/freespace to install the heater. For a exterior wall application a small baseboard electric heater would be a better solution to the problem or a toekick electric heater under a sink vanity.

12000 btu's per 500 square feet is a good rule of thumb

HONEYWELL WEBSITE:
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.

no does not matter but you must have a ground leg