On Fri, 9 Dec 2016 07:02:58 -0800 (PST), Mark H
wrote:

On Thursday, December 8, 2016 at 11:14:06 PM UTC-6, charliesal7 wrote:
I would like to connect a sauna heater in my garage. It is a 240v 23amp
heater. This picture is my box. Will it work?
http://www.homeownershub.com/img/81
http://www.homeownershub.com/img/82

NO it looks like you only have 110 volts split to both fuse holders.
Not to mention the sauna installation WILL require a GFI breaker (at
least according to Ontario code)