View Full Version : Unit Heaters for the Shop

11-12-2011, 01:39 PM
Does someone know of a source for a gas fired, fan-type unit heater with
dimensions similar to the following?

15" wide x 24" tall x 24" deep

The nearest match I can find is a Reznor Model F (https://www.rezspec.com/catalog-f.html) (14" W x 30" T x 32" D).
Its height and depth are too large for the available space constraints.

Also, opinions about the following models of unit heaters in the 45k - 60k
BTU capacity are welcomed.

Lennonx LF24 (http://www.lennoxcommercial.com/products/heating/LF24/)
Reznor UDAP (https://www.rezspec.com/catalog-udap.html)
Mr Heater / Big Maxx (http://www.mrheater.com/product.aspx?catid=50&id=117)

11-12-2011, 02:33 PM
Try Grainger. I bought one about that size from them years ago.

11-12-2011, 04:25 PM
I've had the 45K BTU Mr. Heater in my garage for a couple years now and it's been great. I have a 3-1/2 car attached garage with insulated walls and doors. At -20F outside the heater will have the garage at 70 degrees in a about 5 minutes. Wish I'd have installed a heater 20 years ago.

11-12-2011, 04:34 PM
I use one about that same size in my shop. It's a Duo-Therm out of an RV. I run mine on LP. IT's about 22-24K BTU.

11-12-2011, 07:17 PM
I'm in the process of installing a Modine "Hot Dawg" unit heater right now. My ancient GE finally bit the dust and is being replaced by a 45,000 BTU unit heater. It's a nice small package and frees up a considerable amount of much needed floor space.

Here's a site with specs for their heaters.


11-12-2011, 08:00 PM
I have a 50k btu modine hot dawg heater, its about that big

can see it above mill


11-12-2011, 09:48 PM
Where are you located? I have one I believe almost that size I decided not to use.

11-13-2011, 01:51 PM
Where are you located?PM sent.



11-13-2011, 01:58 PM
Arcane & legendboy, thank you for the reminder about Modine. I've seen
their logo on unit heaters but hadn't thought of them while drawing up
my supplier list.

I'll look for a local vendor. How would you rate Modine's design, materials and
build quality. Any opinions about the exchanger, valves or fan motor?


11-13-2011, 02:07 PM
Try Grainger.Thanks for the suggestion.

They still have some types of heaters, but a search last night didn't turn up
something in the vertical or horizontal line of gas fired, fan-type unit heaters.

As mentioned above, life would be simpler if I could find a vertical (portrait?)
oriented heater with dimensions that would fit within the existing envelope.

The alternative is to source a horizontal (landscape) oriented unit similar to
the ones in the links and shown by legendboy. This requires relocation to
a position in the shop that is less satisfactory for a number of reasons.


11-13-2011, 02:19 PM
I use one about that same size in my shop. It's a Duo-Therm out of an RV. I run
mine on LP. IT's about 22-24K BTU.Perhaps Duo-Therm has been absorbed by another organization? Searches
for current product selection are drawing a blank.

LP-only units would be a deal-breaker for my circumstances. 30K BTU
would be the bare minimum for coping with the depths of winter in this climate.
At that capacity, I wouldn't want to open an overhead door in m-January.


11-13-2011, 03:10 PM
How about a home central heating unit. They can be mounted horizontally they are pretty cheap and plentiful. Probably get a good used one for little cost.