That gas heater would have been great for my daughter last month when her grid failed.
I just emailed her the URL.
That UltumateAir unit looks good too. But, after cleaning the our Sanyo's filters
every 3 or 4 weeks, I get the feeling they are doing a pretty good job
of cleaning a lot of gunk out of the indoor air.
They worked great during the tree pollen season this past summer.
Normally, I would have some seriously red, itchy eyes for a few weeks.
But this time I needed very little in the way of eye-drops..
Mary FYI, if your house is really tight, getting fresh air indoors will be important.
Our 1956 home has fresh air designed into it..