When you're comparing hydronic unit heaters, the main challenge isn't finding a heater-it's deciding which model size, condition, and price make sense together. Here are four Dayton options: two are the same 27-3/4"-high 5PV27 model listed at different prices, one is a 24"-high 5PV52 with an airflow figure in the product name, and one is a 20-7/8"-wide 5YH19.
Quick take
The 5PV27 appears twice: one is described as new but with no box and a dent in the fins, and the other is an open-box unit with a detailed specification list. The 5PV52 is the only option with an airflow figure in the title. The 5YH19 is the only option with a width stated in the product name. If you want the lowest listed price, the dented-fin 5PV27 stands out. If you want a written spec set, the open-box 5PV27 is the one. If you want a 24-inch high model with airflow stated up front, the 5PV52 is the direct pick. If width is the main constraint, the 5YH19 fits.
Listed price comparison
| Product | Listed price | Price bar | What stands out |
|---|---|---|---|
| Dayton 5Yh19 Hydronic Unit Heater, 20-7/8" W, 13" D | $1,328.99 | 20-7/8" W, model 5YH19 | |
| Dayton - 5Pv27 Hydronic Unit Heater 27-3/4" H limited shipping see description | $250.00 | New, no box, dent in fins described as not affecting use | |
| Dayton 5Pv52 Hydronic Unit Heater, 24" H, 1400 Cfm | $1,426.99 | 24" H, 1400 CFM | |
| Dayton - 5Pv27 Hydronic Unit Heater 27-3/4" H | $769.00 | Open box, detailed specs |
Decision matrix
- Lowest listed price: the 5PV27 with the dented fin and no box, if the limited-shipping note works for you.
- Most complete specifications: the open-box 5PV27, which includes airflow, output, and connection details.
- Airflow in the product name: the 5PV52, with 24-inch height and a stated CFM.
- Width stated up front: the 5YH19.
Product notes
Dayton - 5Pv27 Hydronic Unit Heater 27-3/4" H limited shipping see description
At $250.00, this is the lowest price in the group. The description says the heater is new but has no box, and the fins have a dent that is described as not affecting use. You still get the 27-3/4" H size shared with the other 5PV27 listing, so the lower price is mainly a function of the described condition and the shipping limitation called out in the title. If you can work with a dented fin and the limited-shipping states are acceptable, this is the most cost-conscious route. If you want a pristine-looking box and no condition notes, this one probably isn't for you.
Dayton - 5Pv27 Hydronic Unit Heater 27-3/4" H
Priced at $769.00, this is the middle listing in the group. The description says it comes from an open box, has never been used or tested, and what you see in the pictures is what arrives. It also provides the most detailed specification set of the four, including 2,200 CFM airflow, 144,000 BtuH output at 2 PSI steam, 104,000 BtuH output at 200°F water, 1-1/2" threaded female NPT connections, and an 18" fan diameter. That makes this the choice if you want more detailed specs. The limitation is the open-box status and the price gap to the other 5PV27 unit.
Dayton 5Pv52 Hydronic Unit Heater, 24" H, 1400 Cfm
At $1,426.99, this is the most expensive of the four. It's also the only one with an airflow figure in the product name: 1400 CFM. The 24-inch height is different from the 27-3/4-inch height shared by the two 5PV27 listings, so if a shorter vertical profile is useful in your space, that difference matters. Because the title carries the key spec, this is the straightforward choice for a buyer who wants that airflow figure up front. The tradeoff is cost: it sits at the top of the range.
Dayton 5Yh19 Hydronic Unit Heater, 20-7/8" W, 13" D
Listed at $1,328.99, the 5YH19 is priced just below the 5PV52. Its distinguishing detail is the width in the product name: 20-7/8" W. That's useful if you're trying to fit the heater into a space where width is the deciding factor. The model number 5YH19 makes it easy to search. The product type is a suspended horizontal hydronic wall and ceiling unit heater, so it belongs in the same application family as the others. The main drawback is price: at $1,328.99 it sits in the upper part of the range.
Final recommendations by use case
- If price is the deciding factor: the 5PV27 with the dented fins gives you the lowest listed price in this set.
- If you want the most specification detail: the open-box 5PV27 is the strongest option.
- If you need a 24-inch high heater with an airflow figure in the product name: the 5PV52 is the direct match.
- If a width stated in the product title is what you need: the 5YH19 is the option.
