Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White

Was an excellent buy; good product

So quiet. Nice features.I actually vented it into a utility room outside the heated conditioned space and then extended the exhaust vent through the exterior wall with stainless steel tubing ( 6 feet of 1.5" 304 SS tubing from Zoro cost ~$50 and its ID is 1 mm larger than the Rinnai exhaust pipe OD so its a pretty good slip fit for a tack weld or muffler clamp. The alternative would have been about $400 in Rinnai vent extensions ... I think Rinnai might want to rethink its direct vent furnace extensions. They are so complicated compared to direct vent furnaces that use regular PVC fittings, but I understand that the Rinnai exhaust temp is probably too high for PVC. But a simple factory approved adaptor to standard 1.5" SS 304 tubing would be nice. )

We needed a modern styled, direct vent heater for a 450 sq-ft four season room. One that could be safely vented thru an existing plexiglass window. We found it with this “Rinnai Unit”.Installation instructions were clear, straight forward. The unit is well-constructed, easily serviced with any possible replacement/service parts available online. It has received many compliments on its performance from dinner guests on its exceptionally high heat output and its quite operation.Its automatic variable heat output based on the rooms heating needs, its ease of programing two independent time/temperatures and being able to program it to maintain a minimum room temp just makes a well thought out design and top-of-the-line unit.

This little heater heats my 600 sq, foot, well insulated home but I wouldn't recommend anything bigger.

It works great just a little noisy. Would highly recommend it.

Connect the wire from the R (or Rh) terminal on the thermostat to one of the transformer's "AC" terminals . Connect to the other "AC" terminal:-one of the black wires from the relay and-the wire from the C (common) terminal on the thermostat.So, one side of the transformer AC will have a single wire connected (to R), while the other side will have two wires connected: a black wire from the relay and the C (common) wire leading to the thermostat.Next:• The second black wire from the relay connects directly to the W terminal on the thermostat.

Excellent heater. Keeping our living space very comfortable. I want to put one in our sunroom next.

First off I my GF500 was I thought the shiznit of heaters for our log house but little did I know this Rinnai was so much quieter and puts out an even heat without Turbo sound every cycle like the GF500. When I purchased the optional Rinnai kit for wall thermostat for $89 I can say this is the only heater I found that could do that. My NEST controls everything daily from turning it off at night and warming up in the morning to eco save when nobody is home, plus I can control it remotely so if I am gone can turn it up before I get home, or shut it off if I forget and it will always keep a safety temp to keep house from freezing. E-Faucets put it on sale a few weeks after I bought it for almost $400 less, I called them and they said within 30 days they would refund the difference. They did!!! I am so thrilled and install used the same pipes as my GF500 did so I had it installed in a few hours. I used a couple of floor tiles from Menards to set it on the carpet and it looks professional. AAAAA++++++!!!