Quick Answer: PrecisionTemp is a specialty RV/marine tankless brand, not a mainstream drop-in like Fogatti or Camplux — its current lineup is the RV-550 EC (55,000 BTU/hr max input, $1,290 per PrecisionTemp’s own site) and the TwinTemp-2 ($5,275), which adds two 1,500-watt electric elements and a hydronic loop so one unit heats both your water and the coach’s interior. These are OEM-spec units most often found factory-installed in higher-end diesel pushers, not units most owners shop for by brand name. As of this review, PrecisionTemp’s own site lists all units as temporarily out of stock, though some models remain available through third-party RV parts retailers.
If you’re researching “PrecisionTemp tankless water heater,” you likely either have one already installed in a coach you bought, or you’ve read about the TwinTemp-2’s combined water-and-space-heating trick and want to know if it’s real. It is — but it’s a different product category from the budget drop-in units most RV buying guides cover, and it comes with a correspondingly different price tag.
PrecisionTemp RV-550 EC — full spec breakdown
PrecisionTemp RV-550 EC Tankless Water Heater
- Rated for an 88°F temperature rise per gallon per minute at max burn, and a 26°F rise per gallon per minute at min burn — PrecisionTemp doesn't publish a single GPM max figure the way Rinnai or Rheem do for whole-home units.
- Compact footprint at 13.5" W x 13.5" D x 14.25" H, with freeze protection drawing less than 2 amps on its own circuit.
- Available in both propane and natural-gas versions, per the manufacturer's own product pages.
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The TwinTemp-2: one unit, two jobs
The TwinTemp-2 is PrecisionTemp’s higher-end play: the same 55,000 BTU/hr burner (44,500 BTU/hr output at max, dropping to 15,000/12,500 BTU/hr at low burn) is paired with two 1,500-watt (5,100 BTU) electric elements and a hydronic loop, so it can supply both domestic hot water and space heating for the coach through a single appliance — replacing what would otherwise be a separate water heater and furnace. PrecisionTemp’s own spec page lists the unit at 20.5” W x 16” D x 14” H, running on 12VDC at 4.5 amps plus a 110VAC connection, though the published weight is inconsistent between two figures on the same page (70 lbs and 101 lbs) — worth confirming with PrecisionTemp directly if curb weight matters for your coach’s rough-in. At $5,275, it costs roughly 4x the water-only RV-550 EC, which makes sense once you account for it replacing two separate systems rather than one.
By the numbers
- 55,000 BTU/hr max input, 16,000 BTU/hr min input — PrecisionTemp’s own published spec for the RV-550 EC, putting it in the same BTU range as mainstream drop-in brands like Camplux’s RE264, despite the very different price and installation tier. — PrecisionTemp
- $5,275 for the TwinTemp-2 — roughly 4x the $1,290 RV-550 EC price, reflecting that the TwinTemp-2 replaces both a water heater and a hydronic space-heating furnace in one unit. — PrecisionTemp
- “Temporarily out of stock on all units” — the stock status PrecisionTemp’s own site displayed at the time of this review, with no restock date given — a real availability gap worth checking before assuming any specific model is purchasable today. — PrecisionTemp
How PrecisionTemp compares to mainstream RV drop-in brands
| Brand / model | BTU (max) | Also heats coach interior? | Typical price | Market tier |
|---|---|---|---|---|
| PrecisionTemp RV-550 EC | 55,000 | No | ~$1,290 | OEM / diesel pusher |
| PrecisionTemp TwinTemp-2 | 55,000 | Yes (hydronic) | ~$5,275 | OEM / diesel pusher |
| Fogatti InstaShower 8 Plus | 55,000 | No | ~$510–570 | Aftermarket drop-in |
| Camplux RE264 | 65,000 | No | ~$400–500 | Aftermarket drop-in |
| Girard GSWH-2 (2GWHAM) | 42,000 | No | ~$700–850 | Aftermarket drop-in |
The BTU ratings land in a similar range across brands, but the market tier and feature set don’t: PrecisionTemp targets factory installs in larger coaches where a combined water-and-space-heating appliance is worth the premium, while Fogatti, Camplux, and Girard target owners replacing or upgrading a drop-in unit themselves. See our best RV tankless water heater roundup for the full picks among the aftermarket brands.
Who should actually consider PrecisionTemp
- Diesel pusher and larger coach owners whose rig already came with a PrecisionTemp unit, or who are specifying equipment for a custom build and want one appliance to cover both hot water and space heat.
- Skip the TwinTemp-2 if you just need hot water — at roughly 4x the RV-550 EC’s price, it only makes financial sense if you’re also replacing (or specifying) your space heating in the same purchase.
- Skip PrecisionTemp entirely if you’re upgrading a standard 6-10 gallon tank cutout in a travel trailer — that’s squarely the aftermarket drop-in brands’ territory, not this one. Check our best RV tankless water heater roundup for Fogatti, Camplux, Furrion, and Girard instead.
- Confirm stock before ordering. PrecisionTemp’s own site listed all current units as temporarily out of stock at the time of this review; a third-party RV parts retailer may still have inventory, but check directly rather than assuming availability.
The bottom line
PrecisionTemp isn’t a like-for-like alternative to Fogatti, Camplux, or Girard — it’s a different market tier aimed at larger coaches and OEM installs, built around the RV-550 EC’s 55,000 BTU/hr water-only unit and the TwinTemp-2’s combined water-and-hydronic-heat design. The BTU numbers look similar to mainstream drop-in brands on paper, but the roughly 4x price jump for the TwinTemp-2 reflects real added function (replacing a separate furnace), not just a premium badge. If you already own one, the specs above come straight from PrecisionTemp’s own product pages; if you’re shopping for a travel-trailer upgrade instead, start with our best RV tankless water heater roundup.